HST observations of host galaxies in three radio-selected BL lacertae objects
Identifieur interne : 001348 ( PascalFrancis/Corpus ); précédent : 001347; suivant : 001349HST observations of host galaxies in three radio-selected BL lacertae objects
Auteurs : Renato Falomo ; C. Megan Urry ; Joseph E. Pesce ; Riccardo Scarpa ; Mauro Giavalisco ; Aldo TrevesSource :
- The Astrophysical journal [ 0004-637X ] ; 1997-02-10.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We present high-resolution images of three BL Lac objects (0814+425, 1823+568, 2254+074) taken with the WFPC-2 camera on Hubble Space Telescope (HST) as part of a study of BL Lacs from a complete radio-selected sample. In two cases we clearly detect the host galaxies while the third BL Lac (0814+425) is unresolved. The host galaxy of 2254+074 is a moderately bright elliptical, while the inferred luminosity of the host galaxy for 1823+568 is at the high end of the range for previously known BL Lac hosts. The lack of detection of a host galaxy for 0814+425 calls into question the validity of its low reported redshift. Comparison of the HST data with subarcsecond ground-based R-band images shows excellent agreement on the largest scales, while on smaller scales only HST detects the galaxy significantly above the nuclear light. In the case of 2254+074, the high resolution of HST allows us to establish that the host galaxy is an elliptical.
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Format Inist (serveur)
| NO : | PASCAL 97-0566599 AIP |
|---|---|
| ET : | HST observations of host galaxies in three radio-selected BL lacertae objects |
| AU : | FALOMO (Renato); URRY (C. Megan); PESCE (Joseph E.); SCARPA (Riccardo); GIAVALISCO (Mauro); TREVES (Aldo) |
| AF : | Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padua, Italy falomo@astrpd.pd.astro.it (1 aut.); Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 cmu@stsci.edu pesce@kepler.stsci.edu (2 aut.); Department of Astronomy, Padua University, Vicolo dell'Osservatorio 5, 35122 Padua, Italy (4 aut.); Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 riccardo@astrpd.pd.astro.it scarpa@stsci.edu (4 aut.); Carnegie Observatories, 813 Santa Barbara Street, Pasadena, California 91101-1292 mauro@ociw.edu (5 aut.); SISSA/ISAS, via Beirut 2-4, 34014 Trieste, Italy treves@astmiu.uni.mi.astro.it (6 aut.) |
| DT : | Publication en série; Niveau analytique |
| SO : | The Astrophysical journal; ISSN 0004-637X; Coden ASJOAB; Etats-Unis; Da. 1997-02-10; Vol. 476; No. 1; Pp. 113-119 |
| LA : | Anglais |
| EA : | We present high-resolution images of three BL Lac objects (0814+425, 1823+568, 2254+074) taken with the WFPC-2 camera on Hubble Space Telescope (HST) as part of a study of BL Lacs from a complete radio-selected sample. In two cases we clearly detect the host galaxies while the third BL Lac (0814+425) is unresolved. The host galaxy of 2254+074 is a moderately bright elliptical, while the inferred luminosity of the host galaxy for 1823+568 is at the high end of the range for previously known BL Lac hosts. The lack of detection of a host galaxy for 0814+425 calls into question the validity of its low reported redshift. Comparison of the HST data with subarcsecond ground-based R-band images shows excellent agreement on the largest scales, while on smaller scales only HST detects the galaxy significantly above the nuclear light. In the case of 2254+074, the high resolution of HST allows us to establish that the host galaxy is an elliptical. |
| CC : | 001E03D54C; 001E03D52E; 001E03A85K |
| FD : | 9854C; 9852E; 9585K; Etude expérimentale; Etude théorique; Objet BL Lacertae; Photométrie astronomique; Brillance; Modélisation |
| ED : | Experimental study; Theoretical study; BL Lacertae objects; Astronomical photometry; Brightness; Modelling |
| LO : | INIST-512 |
| ID : | 97-0566599 |
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Megan" last="Urry">C. Megan Urry</name><affiliation><inist:fA14 i1="02"><s1>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 cmu@stsci.edu pesce@kepler.stsci.edu</s1><sZ>2 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Pesce, Joseph E" sort="Pesce, Joseph E" uniqKey="Pesce J" first="Joseph E." last="Pesce">Joseph E. Pesce</name></author><author><name sortKey="Scarpa, Riccardo" sort="Scarpa, Riccardo" uniqKey="Scarpa R" first="Riccardo" last="Scarpa">Riccardo Scarpa</name><affiliation><inist:fA14 i1="03"><s1>Department of Astronomy, Padua University, Vicolo dell'Osservatorio 5, 35122 Padua, Italy</s1><sZ>4 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="04"><s1>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 riccardo@astrpd.pd.astro.it scarpa@stsci.edu</s1><sZ>4 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Giavalisco, Mauro" sort="Giavalisco, Mauro" uniqKey="Giavalisco M" first="Mauro" last="Giavalisco">Mauro Giavalisco</name><affiliation><inist:fA14 i1="05"><s1>Carnegie Observatories, 813 Santa Barbara Street, Pasadena, California 91101-1292 mauro@ociw.edu</s1><sZ>5 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Treves, Aldo" sort="Treves, Aldo" uniqKey="Treves A" first="Aldo" last="Treves">Aldo Treves</name><affiliation><inist:fA14 i1="06"><s1>SISSA/ISAS, via Beirut 2-4, 34014 Trieste, Italy treves@astmiu.uni.mi.astro.it</s1><sZ>6 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">The Astrophysical journal</title><title level="j" type="abbreviated">Astrophys. j.</title><idno type="ISSN">0004-637X</idno><imprint><date when="1997-02-10">1997-02-10</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The Astrophysical journal</title><title level="j" type="abbreviated">Astrophys. j.</title><idno type="ISSN">0004-637X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Astronomical photometry</term><term>BL Lacertae objects</term><term>Brightness</term><term>Experimental study</term><term>Modelling</term><term>Theoretical study</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>9854C</term><term>9852E</term><term>9585K</term><term>Etude expérimentale</term><term>Etude théorique</term><term>Objet BL Lacertae</term><term>Photométrie astronomique</term><term>Brillance</term><term>Modélisation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present high-resolution images of three BL Lac objects (0814+425, 1823+568, 2254+074) taken with the WFPC-2 camera on Hubble Space Telescope (HST) as part of a study of BL Lacs from a complete radio-selected sample. In two cases we clearly detect the host galaxies while the third BL Lac (0814+425) is unresolved. The host galaxy of 2254+074 is a moderately bright elliptical, while the inferred luminosity of the host galaxy for 1823+568 is at the high end of the range for previously known BL Lac hosts. The lack of detection of a host galaxy for 0814+425 calls into question the validity of its low reported redshift. Comparison of the HST data with subarcsecond ground-based R-band images shows excellent agreement on the largest scales, while on smaller scales only HST detects the galaxy significantly above the nuclear light. In the case of 2254+074, the high resolution of HST allows us to establish that the host galaxy is an elliptical.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0004-637X</s0></fA01><fA02 i1="01"><s0>ASJOAB</s0></fA02><fA03 i2="1"><s0>Astrophys. j.</s0></fA03><fA05><s2>476</s2></fA05><fA06><s2>1</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>HST observations of host galaxies in three radio-selected BL lacertae objects</s1></fA08><fA11 i1="01" i2="1"><s1>FALOMO (Renato)</s1></fA11><fA11 i1="02" i2="1"><s1>URRY (C. Megan)</s1></fA11><fA11 i1="03" i2="1"><s1>PESCE (Joseph E.)</s1></fA11><fA11 i1="04" i2="1"><s1>SCARPA (Riccardo)</s1></fA11><fA11 i1="05" i2="1"><s1>GIAVALISCO (Mauro)</s1></fA11><fA11 i1="06" i2="1"><s1>TREVES (Aldo)</s1></fA11><fA14 i1="01"><s1>Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padua, Italy falomo@astrpd.pd.astro.it</s1><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 cmu@stsci.edu pesce@kepler.stsci.edu</s1><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Department of Astronomy, Padua University, Vicolo dell'Osservatorio 5, 35122 Padua, Italy</s1><sZ>4 aut.</sZ></fA14><fA14 i1="04"><s1>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 riccardo@astrpd.pd.astro.it scarpa@stsci.edu</s1><sZ>4 aut.</sZ></fA14><fA14 i1="05"><s1>Carnegie Observatories, 813 Santa Barbara Street, Pasadena, California 91101-1292 mauro@ociw.edu</s1><sZ>5 aut.</sZ></fA14><fA14 i1="06"><s1>SISSA/ISAS, via Beirut 2-4, 34014 Trieste, Italy treves@astmiu.uni.mi.astro.it</s1><sZ>6 aut.</sZ></fA14><fA20><s1>113-119</s1></fA20><fA21><s1>1997-02-10</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>512</s2></fA43><fA44><s0>8100</s0><s1>© 1997 American Institute of Physics. All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>97-0566599</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>The Astrophysical journal</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>We present high-resolution images of three BL Lac objects (0814+425, 1823+568, 2254+074) taken with the WFPC-2 camera on Hubble Space Telescope (HST) as part of a study of BL Lacs from a complete radio-selected sample. In two cases we clearly detect the host galaxies while the third BL Lac (0814+425) is unresolved. The host galaxy of 2254+074 is a moderately bright elliptical, while the inferred luminosity of the host galaxy for 1823+568 is at the high end of the range for previously known BL Lac hosts. The lack of detection of a host galaxy for 0814+425 calls into question the validity of its low reported redshift. Comparison of the HST data with subarcsecond ground-based R-band images shows excellent agreement on the largest scales, while on smaller scales only HST detects the galaxy significantly above the nuclear light. 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Megan); PESCE (Joseph E.); SCARPA (Riccardo); GIAVALISCO (Mauro); TREVES (Aldo)</AU><AF>Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padua, Italy falomo@astrpd.pd.astro.it (1 aut.); Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 cmu@stsci.edu pesce@kepler.stsci.edu (2 aut.); Department of Astronomy, Padua University, Vicolo dell'Osservatorio 5, 35122 Padua, Italy (4 aut.); Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218 riccardo@astrpd.pd.astro.it scarpa@stsci.edu (4 aut.); Carnegie Observatories, 813 Santa Barbara Street, Pasadena, California 91101-1292 mauro@ociw.edu (5 aut.); SISSA/ISAS, via Beirut 2-4, 34014 Trieste, Italy treves@astmiu.uni.mi.astro.it (6 aut.)</AF><DT>Publication en série; Niveau analytique</DT><SO>The Astrophysical journal; ISSN 0004-637X; Coden ASJOAB; Etats-Unis; Da. 1997-02-10; Vol. 476; No. 1; Pp. 113-119</SO><LA>Anglais</LA><EA>We present high-resolution images of three BL Lac objects (0814+425, 1823+568, 2254+074) taken with the WFPC-2 camera on Hubble Space Telescope (HST) as part of a study of BL Lacs from a complete radio-selected sample. In two cases we clearly detect the host galaxies while the third BL Lac (0814+425) is unresolved. The host galaxy of 2254+074 is a moderately bright elliptical, while the inferred luminosity of the host galaxy for 1823+568 is at the high end of the range for previously known BL Lac hosts. The lack of detection of a host galaxy for 0814+425 calls into question the validity of its low reported redshift. Comparison of the HST data with subarcsecond ground-based R-band images shows excellent agreement on the largest scales, while on smaller scales only HST detects the galaxy significantly above the nuclear light. In the case of 2254+074, the high resolution of HST allows us to establish that the host galaxy is an elliptical.</EA><CC>001E03D54C; 001E03D52E; 001E03A85K</CC><FD>9854C; 9852E; 9585K; Etude expérimentale; Etude théorique; Objet BL Lacertae; Photométrie astronomique; Brillance; Modélisation</FD><ED>Experimental study; Theoretical study; BL Lacertae objects; Astronomical photometry; Brightness; Modelling</ED><LO>INIST-512</LO><ID>97-0566599</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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