The ionized gas in the CALIFA early-type galaxies: I. Mapping two representative cases: NGC 6762 and NGC 5966
Identifieur interne : 005831 ( Main/Exploration ); précédent : 005830; suivant : 005832The ionized gas in the CALIFA early-type galaxies: I. Mapping two representative cases: NGC 6762 and NGC 5966
Auteurs : C. Kehrig [Allemagne, Espagne] ; A. Monreal-Ibero [Espagne] ; P. Papaderos [Portugal] ; J. M. Vilchez [Espagne] ; J. M. Gomes [Portugal] ; J. Masegosa [Espagne] ; S. F. Sanchez [Espagne] ; M. D. Lehnert [France] ; R. Cid Fernandes [Espagne, Brésil] ; J. Bland-Hawthorn [Australie] ; D. J. Bomans [Allemagne] ; I. Marquez [Espagne] ; D. Mast [Espagne] ; J. A. L. Aguerri [Espagne] ; A. R. Lopez-Sanchez [Australie] ; R. A. Marino [Espagne] ; A. Pasquali [Allemagne] ; I. Perez [Espagne] ; M. M. Roth [Allemagne] ; P. Sanchez-Blazquez [Espagne] ; B. Ziegler [Autriche]Source :
- Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Gaz ionisé, Galaxies premier type, Galaxies lenticulaires, Spectrométrie, Continuum, Brillance surface, Modèle, Lumière stellaire, Spectre émission, Raie émission, Ionisation, Morphologie, Ellipsoïde, Disque tournant, Galaxies raies émission, Excitation, Photoionisation, Etoile Be, Galaxies elliptiques.
- Wicri :
- topic : Spectrométrie.
English descriptors
- KwdEn :
Abstract
As part of the ongoing CALIFA survey, we have conducted a thorough bidimensional analysis of the ionized gas in two E/S0 galaxies, NGC 6762 and NGC 5966, aiming to shed light on the nature of their warm ionized ISM. Specifically, we present optical (3745-7300 Å) integral field spectroscopy obtained with the PMAS/PPAK integral field spectrophotometer. Its wide field-of-view (1' × 1') covers the entire optical extent of each galaxy down to faint continuum surface brightnesses. To recover the nebular lines, we modeled and subtracted the underlying stellar continuum from the observed spectra using the STARLIGHT spectral synthesis code. The pure emission-line spectra were used to investigate the gas properties and determine the possible sources of ionization. We show the advantages of IFU data in interpreting the complex nature of the ionized gas in NGC 6762 and NGC 5966. In NGC 6762, the ionized gas and stellar emission display similar morphologies, while the emission line morphology is elongated in NGC 5966, spanning ∼6 kpc, and is oriented roughly orthogonal to the major axis of the stellar continuum ellipsoid. Whereas gas and stars are kinematically aligned in NGC 6762, the gas is kinematically decoupled from the stars in NGC 5966. A decoupled rotating disk or an "ionization cone" are two possible interpretations of the elongated ionized gas structure in NGC 5966. The latter would be the first "ionization cone" of such a dimension detected within a weak emission-line galaxy. Both galaxies have weak emission-lines relative to the continuum [EW(Hα)? 3 Å] and have very low excitation, log([OIII]h 5007/Hβ) ?0.5. Based on optical diagnostic ratios ([OIII]h 5007/Hβ, [NII]λ6584/Hα, [SII]λ16717, 6731/Hα, [OI]λ6300/Hα), both objects contain a LINER nucleus and an extended LINER-like gas emission. The emission line ratios do not vary significantly with radius or aperture, which indicates that the nebular properties are spatially homogeneous. The gas emission in NGC 6762 can be best explained by photoionization by pAGB stars without the need of invoking any other excitation mechanism. In the case of NGC 5966, the presence of a nuclear ionizing source seems to be required to shape the elongated gas emission feature in the "ionization cone" scenario, although ionization by pAGB stars cannot be ruled out. Further study of this object is needed to clarify the nature of its elongated gas structure.
Affiliations:
- Allemagne, Australie, Autriche, Brésil, Espagne, France, Portugal
- Andalousie, Bade-Wurtemberg, Canaries, Communauté de Madrid, District de Karlsruhe, Nouvelle-Galles du Sud, Santa Catarina, Vienne (Autriche)
- Grenade (Espagne), Heidelberg, Madrid, Sydney, Vienne (Autriche)
- Université complutense de Madrid, Université de Grenade, Université de Sydney
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Sanchez</name><affiliation wicri:level="2"><inist:fA14 i1="04"><s1>Centro Astronómico Hispano Alemán, Calar Alto (CSIC-MPG), C/ Jesus Durbán Remón 2</s1><s2>04004 Almería</s2><s3>ESP</s3><sZ>7 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Lehnert, M D" sort="Lehnert, M D" uniqKey="Lehnert M" first="M. D." last="Lehnert">M. D. Lehnert</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>GEPI, Observatoire de Paris, UMR 8111, CNRS, Université Paris Diderot, 5 place Jules Janssen</s1><s2>92190 Meudon</s2><s3>FRA</s3><sZ>8 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>92190 Meudon</wicri:noRegion><wicri:noRegion>5 place Jules Janssen</wicri:noRegion><wicri:noRegion>92190 Meudon</wicri:noRegion></affiliation></author><author><name sortKey="Cid Fernandes, R" sort="Cid Fernandes, R" uniqKey="Cid Fernandes R" first="R." last="Cid Fernandes">R. Cid Fernandes</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="06"><s1>Departamento de Física-CFM, Universidade Federal de Santa Catarina, CP 476, 88040-900</s1><s2>Florianopolis, SC</s2><s3>BRA</s3><sZ>9 aut.</sZ></inist:fA14><country>Brésil</country><placeName><region type="state">Santa Catarina</region></placeName></affiliation></author><author><name sortKey="Bland Hawthorn, J" sort="Bland Hawthorn, J" uniqKey="Bland Hawthorn J" first="J." last="Bland-Hawthorn">J. Bland-Hawthorn</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Sydney Institute for Astronomy, School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>10 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author><author><name sortKey="Bomans, D J" sort="Bomans, D J" uniqKey="Bomans D" first="D. J." last="Bomans">D. J. Bomans</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Astronomical Institute of the Ruhr-University Bochum, Universitaetsstr. 150</s1><s2>44801 Bochum</s2><s3>DEU</s3><sZ>11 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>44801 Bochum</wicri:noRegion><wicri:noRegion>Universitaetsstr. 150</wicri:noRegion><wicri:noRegion>44801 Bochum</wicri:noRegion></affiliation></author><author><name sortKey="Marquez, I" sort="Marquez, I" uniqKey="Marquez I" first="I." last="Marquez">I. Marquez</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Mast, D" sort="Mast, D" uniqKey="Mast D" first="D." last="Mast">D. Mast</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="04"><s1>Centro Astronómico Hispano Alemán, Calar Alto (CSIC-MPG), C/ Jesus Durbán Remón 2</s1><s2>04004 Almería</s2><s3>ESP</s3><sZ>7 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Aguerri, J A L" sort="Aguerri, J A L" uniqKey="Aguerri J" first="J. A. L." last="Aguerri">J. A. L. Aguerri</name><affiliation wicri:level="2"><inist:fA14 i1="09"><s1>Astrofísica de Canarias (IAC), vía Lactea s/n</s1><s2>38200 La Laguna</s2><s3>ESP</s3><sZ>14 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Canaries</region></placeName></affiliation></author><author><name sortKey="Lopez Sanchez, A R" sort="Lopez Sanchez, A R" uniqKey="Lopez Sanchez A" first="A. R." last="Lopez-Sanchez">A. R. Lopez-Sanchez</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Australian Astronomical Observatory, PO Box 296, Epping</s1><s2>Sydney NSW 1710</s2><s3>AUS</s3><sZ>15 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney NSW 1710</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Department of Physics and Astronomy, Macquarie University</s1><s2>Sydney NSW 2109</s2><s3>AUS</s3><sZ>15 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney NSW 2109</wicri:noRegion></affiliation></author><author><name sortKey="Marino, R A" sort="Marino, R A" uniqKey="Marino R" first="R. A." last="Marino">R. A. Marino</name><affiliation wicri:level="4"><inist:fA14 i1="12"><s1>Departamento de Astrofísica y CC. de la Atmósfera, Facultad de CC. Fisicas, Universidad Complutense de Madrid, Avda. Complutense s/n</s1><s2>28040 Madrid</s2><s3>ESP</s3><sZ>16 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté de Madrid</region><settlement type="city">Madrid</settlement></placeName><orgName type="university">Université complutense de Madrid</orgName></affiliation></author><author><name sortKey="Pasquali, A" sort="Pasquali, A" uniqKey="Pasquali A" first="A." last="Pasquali">A. Pasquali</name><affiliation wicri:level="3"><inist:fA14 i1="13"><s1>Astronomisches Rechen Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, Moenchhofstrasse 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>17 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Perez, I" sort="Perez, I" uniqKey="Perez I" first="I." last="Perez">I. Perez</name><affiliation wicri:level="4"><inist:fA14 i1="14"><s1>Dep. Física Teórica y del Cosmos, Campus de Fuentenueva, Universidad de Granada</s1><s2>18071 Granada</s2><s3>ESP</s3><sZ>18 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region><settlement type="city">Grenade (Espagne)</settlement></placeName><orgName type="university">Université de Grenade</orgName></affiliation></author><author><name sortKey="Roth, M M" sort="Roth, M M" uniqKey="Roth M" first="M. M." last="Roth">M. M. Roth</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Leibniz-Institut für Astrophysik Potsdam, innoFSPEC Potsdam, An der Sternwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sternwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Sanchez Blazquez, P" sort="Sanchez Blazquez, P" uniqKey="Sanchez Blazquez P" first="P." last="Sanchez-Blazquez">P. Sanchez-Blazquez</name><affiliation wicri:level="2"><inist:fA14 i1="15"><s1>Departamento de Física Teórica, Universidad Autonoma de Madrid, Cantoblanco</s1><s2>28049 Madrid</s2><s3>ESP</s3><sZ>20 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Ziegler, B" sort="Ziegler, B" uniqKey="Ziegler B" first="B." last="Ziegler">B. Ziegler</name><affiliation wicri:level="3"><inist:fA14 i1="16"><s1>University of Vienna, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>21 aut.</sZ></inist:fA14><country>Autriche</country><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0314065</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 12-0314065 INIST</idno><idno type="RBID">Pascal:12-0314065</idno><idno type="wicri:Area/PascalFrancis/Corpus">001215</idno><idno type="wicri:Area/PascalFrancis/Curation">004D02</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000C71</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000C71</idno><idno type="wicri:doubleKey">0004-6361:2012:Kehrig C:the:ionized:gas</idno><idno type="wicri:Area/Main/Merge">005B06</idno><idno type="wicri:Area/Main/Curation">005831</idno><idno type="wicri:Area/Main/Exploration">005831</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">The ionized gas in the CALIFA early-type galaxies: I. Mapping two representative cases: NGC 6762 and NGC 5966</title><author><name sortKey="Kehrig, C" sort="Kehrig, C" uniqKey="Kehrig C" first="C." last="Kehrig">C. Kehrig</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Leibniz-Institut für Astrophysik Potsdam, innoFSPEC Potsdam, An der Sternwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sternwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Monreal Ibero, A" sort="Monreal Ibero, A" uniqKey="Monreal Ibero A" first="A." last="Monreal-Ibero">A. Monreal-Ibero</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Papaderos, P" sort="Papaderos, P" uniqKey="Papaderos P" first="P." last="Papaderos">P. Papaderos</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Centro de Astrofísica and Faculdade de Ciências, Rua das Estrelas 4150-762 Porto</s1><s3>PRT</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Centro de Astrofísica and Faculdade de Ciências, Rua das Estrelas 4150-762 Porto</wicri:noRegion></affiliation></author><author><name sortKey="Vilchez, J M" sort="Vilchez, J M" uniqKey="Vilchez J" first="J. M." last="Vilchez">J. M. Vilchez</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Gomes, J M" sort="Gomes, J M" uniqKey="Gomes J" first="J. M." last="Gomes">J. M. Gomes</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Centro de Astrofísica and Faculdade de Ciências, Rua das Estrelas 4150-762 Porto</s1><s3>PRT</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Portugal</country><wicri:noRegion>Centro de Astrofísica and Faculdade de Ciências, Rua das Estrelas 4150-762 Porto</wicri:noRegion></affiliation></author><author><name sortKey="Masegosa, J" sort="Masegosa, J" uniqKey="Masegosa J" first="J." last="Masegosa">J. Masegosa</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Sanchez, S F" sort="Sanchez, S F" uniqKey="Sanchez S" first="S. F." last="Sanchez">S. F. Sanchez</name><affiliation wicri:level="2"><inist:fA14 i1="04"><s1>Centro Astronómico Hispano Alemán, Calar Alto (CSIC-MPG), C/ Jesus Durbán Remón 2</s1><s2>04004 Almería</s2><s3>ESP</s3><sZ>7 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Lehnert, M D" sort="Lehnert, M D" uniqKey="Lehnert M" first="M. D." last="Lehnert">M. D. Lehnert</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>GEPI, Observatoire de Paris, UMR 8111, CNRS, Université Paris Diderot, 5 place Jules Janssen</s1><s2>92190 Meudon</s2><s3>FRA</s3><sZ>8 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>92190 Meudon</wicri:noRegion><wicri:noRegion>5 place Jules Janssen</wicri:noRegion><wicri:noRegion>92190 Meudon</wicri:noRegion></affiliation></author><author><name sortKey="Cid Fernandes, R" sort="Cid Fernandes, R" uniqKey="Cid Fernandes R" first="R." last="Cid Fernandes">R. Cid Fernandes</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="06"><s1>Departamento de Física-CFM, Universidade Federal de Santa Catarina, CP 476, 88040-900</s1><s2>Florianopolis, SC</s2><s3>BRA</s3><sZ>9 aut.</sZ></inist:fA14><country>Brésil</country><placeName><region type="state">Santa Catarina</region></placeName></affiliation></author><author><name sortKey="Bland Hawthorn, J" sort="Bland Hawthorn, J" uniqKey="Bland Hawthorn J" first="J." last="Bland-Hawthorn">J. Bland-Hawthorn</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Sydney Institute for Astronomy, School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>10 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author><author><name sortKey="Bomans, D J" sort="Bomans, D J" uniqKey="Bomans D" first="D. J." last="Bomans">D. J. Bomans</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Astronomical Institute of the Ruhr-University Bochum, Universitaetsstr. 150</s1><s2>44801 Bochum</s2><s3>DEU</s3><sZ>11 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>44801 Bochum</wicri:noRegion><wicri:noRegion>Universitaetsstr. 150</wicri:noRegion><wicri:noRegion>44801 Bochum</wicri:noRegion></affiliation></author><author><name sortKey="Marquez, I" sort="Marquez, I" uniqKey="Marquez I" first="I." last="Marquez">I. Marquez</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Mast, D" sort="Mast, D" uniqKey="Mast D" first="D." last="Mast">D. Mast</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004</s1><s2>18080 Granada</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>9 aut.</sZ><sZ>12 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="04"><s1>Centro Astronómico Hispano Alemán, Calar Alto (CSIC-MPG), C/ Jesus Durbán Remón 2</s1><s2>04004 Almería</s2><s3>ESP</s3><sZ>7 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Aguerri, J A L" sort="Aguerri, J A L" uniqKey="Aguerri J" first="J. A. L." last="Aguerri">J. A. L. Aguerri</name><affiliation wicri:level="2"><inist:fA14 i1="09"><s1>Astrofísica de Canarias (IAC), vía Lactea s/n</s1><s2>38200 La Laguna</s2><s3>ESP</s3><sZ>14 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Canaries</region></placeName></affiliation></author><author><name sortKey="Lopez Sanchez, A R" sort="Lopez Sanchez, A R" uniqKey="Lopez Sanchez A" first="A. R." last="Lopez-Sanchez">A. R. Lopez-Sanchez</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Australian Astronomical Observatory, PO Box 296, Epping</s1><s2>Sydney NSW 1710</s2><s3>AUS</s3><sZ>15 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney NSW 1710</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Department of Physics and Astronomy, Macquarie University</s1><s2>Sydney NSW 2109</s2><s3>AUS</s3><sZ>15 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney NSW 2109</wicri:noRegion></affiliation></author><author><name sortKey="Marino, R A" sort="Marino, R A" uniqKey="Marino R" first="R. A." last="Marino">R. A. Marino</name><affiliation wicri:level="4"><inist:fA14 i1="12"><s1>Departamento de Astrofísica y CC. de la Atmósfera, Facultad de CC. Fisicas, Universidad Complutense de Madrid, Avda. Complutense s/n</s1><s2>28040 Madrid</s2><s3>ESP</s3><sZ>16 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté de Madrid</region><settlement type="city">Madrid</settlement></placeName><orgName type="university">Université complutense de Madrid</orgName></affiliation></author><author><name sortKey="Pasquali, A" sort="Pasquali, A" uniqKey="Pasquali A" first="A." last="Pasquali">A. Pasquali</name><affiliation wicri:level="3"><inist:fA14 i1="13"><s1>Astronomisches Rechen Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, Moenchhofstrasse 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>17 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Perez, I" sort="Perez, I" uniqKey="Perez I" first="I." last="Perez">I. Perez</name><affiliation wicri:level="4"><inist:fA14 i1="14"><s1>Dep. Física Teórica y del Cosmos, Campus de Fuentenueva, Universidad de Granada</s1><s2>18071 Granada</s2><s3>ESP</s3><sZ>18 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Andalousie</region><settlement type="city">Grenade (Espagne)</settlement></placeName><orgName type="university">Université de Grenade</orgName></affiliation></author><author><name sortKey="Roth, M M" sort="Roth, M M" uniqKey="Roth M" first="M. M." last="Roth">M. M. Roth</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Leibniz-Institut für Astrophysik Potsdam, innoFSPEC Potsdam, An der Sternwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sternwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Sanchez Blazquez, P" sort="Sanchez Blazquez, P" uniqKey="Sanchez Blazquez P" first="P." last="Sanchez-Blazquez">P. Sanchez-Blazquez</name><affiliation wicri:level="2"><inist:fA14 i1="15"><s1>Departamento de Física Teórica, Universidad Autonoma de Madrid, Cantoblanco</s1><s2>28049 Madrid</s2><s3>ESP</s3><sZ>20 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Ziegler, B" sort="Ziegler, B" uniqKey="Ziegler B" first="B." last="Ziegler">B. Ziegler</name><affiliation wicri:level="3"><inist:fA14 i1="16"><s1>University of Vienna, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>21 aut.</sZ></inist:fA14><country>Autriche</country><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Be stars</term><term>Continuum</term><term>Early type galaxies</term><term>Ellipsoid</term><term>Elliptical galaxies</term><term>Emission line</term><term>Emission line galaxies</term><term>Emission spectra</term><term>Excitation</term><term>Ionization</term><term>Ionized gases</term><term>Lenticular galaxies</term><term>Models</term><term>Morphology</term><term>Photoionization</term><term>Rotating disk</term><term>Spectroscopy</term><term>Star light</term><term>Surface brightness</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Gaz ionisé</term><term>Galaxies premier type</term><term>Galaxies lenticulaires</term><term>Spectrométrie</term><term>Continuum</term><term>Brillance surface</term><term>Modèle</term><term>Lumière stellaire</term><term>Spectre émission</term><term>Raie émission</term><term>Ionisation</term><term>Morphologie</term><term>Ellipsoïde</term><term>Disque tournant</term><term>Galaxies raies émission</term><term>Excitation</term><term>Photoionisation</term><term>Etoile Be</term><term>Galaxies elliptiques</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Spectrométrie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">As part of the ongoing CALIFA survey, we have conducted a thorough bidimensional analysis of the ionized gas in two E/S0 galaxies, NGC 6762 and NGC 5966, aiming to shed light on the nature of their warm ionized ISM. Specifically, we present optical (3745-7300 Å) integral field spectroscopy obtained with the PMAS/PPAK integral field spectrophotometer. Its wide field-of-view (1' × 1') covers the entire optical extent of each galaxy down to faint continuum surface brightnesses. To recover the nebular lines, we modeled and subtracted the underlying stellar continuum from the observed spectra using the STARLIGHT spectral synthesis code. The pure emission-line spectra were used to investigate the gas properties and determine the possible sources of ionization. We show the advantages of IFU data in interpreting the complex nature of the ionized gas in NGC 6762 and NGC 5966. In NGC 6762, the ionized gas and stellar emission display similar morphologies, while the emission line morphology is elongated in NGC 5966, spanning ∼6 kpc, and is oriented roughly orthogonal to the major axis of the stellar continuum ellipsoid. Whereas gas and stars are kinematically aligned in NGC 6762, the gas is kinematically decoupled from the stars in NGC 5966. A decoupled rotating disk or an "ionization cone" are two possible interpretations of the elongated ionized gas structure in NGC 5966. The latter would be the first "ionization cone" of such a dimension detected within a weak emission-line galaxy. Both galaxies have weak emission-lines relative to the continuum [EW(Hα)? 3 Å] and have very low excitation, log([OIII]<ov type="dot" pos="below">h</ov>5007/Hβ) ?0.5. Based on optical diagnostic ratios ([OIII]<ov type="dot" pos="below">h</ov>5007/Hβ, [NII]λ6584/Hα, [SII]λ16717, 6731/Hα, [OI]λ6300/Hα), both objects contain a LINER nucleus and an extended LINER-like gas emission. The emission line ratios do not vary significantly with radius or aperture, which indicates that the nebular properties are spatially homogeneous. The gas emission in NGC 6762 can be best explained by photoionization by pAGB stars without the need of invoking any other excitation mechanism. In the case of NGC 5966, the presence of a nuclear ionizing source seems to be required to shape the elongated gas emission feature in the "ionization cone" scenario, although ionization by pAGB stars cannot be ruled out. Further study of this object is needed to clarify the nature of its elongated gas structure.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>Autriche</li><li>Brésil</li><li>Espagne</li><li>France</li><li>Portugal</li></country><region><li>Andalousie</li><li>Bade-Wurtemberg</li><li>Canaries</li><li>Communauté de Madrid</li><li>District de Karlsruhe</li><li>Nouvelle-Galles du Sud</li><li>Santa Catarina</li><li>Vienne (Autriche)</li></region><settlement><li>Grenade (Espagne)</li><li>Heidelberg</li><li>Madrid</li><li>Sydney</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université complutense de Madrid</li><li>Université de Grenade</li><li>Université de Sydney</li></orgName></list><tree><country name="Allemagne"><noRegion><name sortKey="Kehrig, C" sort="Kehrig, C" uniqKey="Kehrig C" first="C." last="Kehrig">C. Kehrig</name></noRegion><name sortKey="Bomans, D J" sort="Bomans, D J" uniqKey="Bomans D" first="D. J." last="Bomans">D. J. Bomans</name><name sortKey="Pasquali, A" sort="Pasquali, A" uniqKey="Pasquali A" first="A." last="Pasquali">A. Pasquali</name><name sortKey="Roth, M M" sort="Roth, M M" uniqKey="Roth M" first="M. M." last="Roth">M. M. Roth</name></country><country name="Espagne"><region name="Andalousie"><name sortKey="Kehrig, C" sort="Kehrig, C" uniqKey="Kehrig C" first="C." last="Kehrig">C. Kehrig</name></region><name sortKey="Aguerri, J A L" sort="Aguerri, J A L" uniqKey="Aguerri J" first="J. A. L." last="Aguerri">J. A. L. Aguerri</name><name sortKey="Cid Fernandes, R" sort="Cid Fernandes, R" uniqKey="Cid Fernandes R" first="R." last="Cid Fernandes">R. Cid Fernandes</name><name sortKey="Marino, R A" sort="Marino, R A" uniqKey="Marino R" first="R. A." last="Marino">R. A. Marino</name><name sortKey="Marquez, I" sort="Marquez, I" uniqKey="Marquez I" first="I." last="Marquez">I. Marquez</name><name sortKey="Masegosa, J" sort="Masegosa, J" uniqKey="Masegosa J" first="J." last="Masegosa">J. Masegosa</name><name sortKey="Mast, D" sort="Mast, D" uniqKey="Mast D" first="D." last="Mast">D. Mast</name><name sortKey="Mast, D" sort="Mast, D" uniqKey="Mast D" first="D." last="Mast">D. Mast</name><name sortKey="Monreal Ibero, A" sort="Monreal Ibero, A" uniqKey="Monreal Ibero A" first="A." last="Monreal-Ibero">A. Monreal-Ibero</name><name sortKey="Perez, I" sort="Perez, I" uniqKey="Perez I" first="I." last="Perez">I. Perez</name><name sortKey="Sanchez Blazquez, P" sort="Sanchez Blazquez, P" uniqKey="Sanchez Blazquez P" first="P." last="Sanchez-Blazquez">P. Sanchez-Blazquez</name><name sortKey="Sanchez, S F" sort="Sanchez, S F" uniqKey="Sanchez S" first="S. F." last="Sanchez">S. F. Sanchez</name><name sortKey="Vilchez, J M" sort="Vilchez, J M" uniqKey="Vilchez J" first="J. M." last="Vilchez">J. M. Vilchez</name></country><country name="Portugal"><noRegion><name sortKey="Papaderos, P" sort="Papaderos, P" uniqKey="Papaderos P" first="P." last="Papaderos">P. Papaderos</name></noRegion><name sortKey="Gomes, J M" sort="Gomes, J M" uniqKey="Gomes J" first="J. M." last="Gomes">J. M. Gomes</name></country><country name="France"><noRegion><name sortKey="Lehnert, M D" sort="Lehnert, M D" uniqKey="Lehnert M" first="M. D." last="Lehnert">M. D. Lehnert</name></noRegion></country><country name="Brésil"><region name="Santa Catarina"><name sortKey="Cid Fernandes, R" sort="Cid Fernandes, R" uniqKey="Cid Fernandes R" first="R." last="Cid Fernandes">R. Cid Fernandes</name></region></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Bland Hawthorn, J" sort="Bland Hawthorn, J" uniqKey="Bland Hawthorn J" first="J." last="Bland-Hawthorn">J. Bland-Hawthorn</name></region><name sortKey="Lopez Sanchez, A R" sort="Lopez Sanchez, A R" uniqKey="Lopez Sanchez A" first="A. R." last="Lopez-Sanchez">A. R. Lopez-Sanchez</name><name sortKey="Lopez Sanchez, A R" sort="Lopez Sanchez, A R" uniqKey="Lopez Sanchez A" first="A. R." last="Lopez-Sanchez">A. R. Lopez-Sanchez</name></country><country name="Autriche"><region name="Vienne (Autriche)"><name sortKey="Ziegler, B" sort="Ziegler, B" uniqKey="Ziegler B" first="B." last="Ziegler">B. Ziegler</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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