A far‐infrared view of the Lockman hole from ISO 95‐μm observations – II. Optical identifications and insights into the nature of the far‐infrared sources
Identifieur interne : 000710 ( Main/Corpus ); précédent : 000709; suivant : 000711A far‐infrared view of the Lockman hole from ISO 95‐μm observations – II. Optical identifications and insights into the nature of the far‐infrared sources
Auteurs : G. Rodighiero ; D. Fadda ; A. Franceschini ; C. LariSource :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2005-02.
English descriptors
Abstract
We present the optical identifications of a 95‐μm ISOPHOT sample in the Lockman hole over an area of approximately half a deg2. The Rodighiero et al. catalogue includes 36 sources, making up a complete flux‐limited sample for S95 μm≥ 100 mJy. Reliable sources were detected, with decreasing but well‐controlled completeness, down to S95 μm≃ 20 mJy. We have combined mid‐infrared (IR) and radio catalogues in this area to identify the potential optical counterparts of the far‐IR sources. We found 14 radio and 13 15‐μm associations, 10 of which have both associations. For the 11 sources with spectroscopic redshift, we have performed a spectrophotometric analysis of the observed spectral energy distributions (SEDs). Four of these 95‐μm sources have been classified as faint IR (FIR) galaxies (LFIR < 1.e11 L⊙), six as luminous IR galaxies (LIRGs) and only one as an ultraluminous IR galaxy (ULIRG). We have discussed the redshift distribution of these objects, comparing our results with evolutionary model predictions 95 and 175 μm. Given their moderate distances (the bulk of the closest spectroscopically identified objects lying at z < 0.2), their luminosities and star formation rates (SFR; median value ∼ 10 M⊙ yr−1), the sources unveiled by ISOPHOT at 95 μm seem to correspond to the low redshift (z < 0.3) FIRBACK 175‐μm population, composed of dusty, star‐forming galaxies with moderate SFRs. We computed and compared different SFR estimators, and found that the SF derived from the bolometric IR luminosity is well correlated with that computed from the radio and mid‐IR fluxes.
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DOI: 10.1111/j.1365-2966.2004.08547.x
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Rodighiero</name><affiliation><mods:affiliation>Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I‐35122 Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Fadda, D" sort="Fadda, D" uniqKey="Fadda D" first="D." last="Fadda">D. Fadda</name><affiliation><mods:affiliation>Caltech, SIRTF Science Center, MC 220‐6, Pasadena, CA 91126, USA</mods:affiliation></affiliation></author><author><name sortKey="Franceschini, A" sort="Franceschini, A" uniqKey="Franceschini A" first="A." last="Franceschini">A. Franceschini</name><affiliation><mods:affiliation>Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I‐35122 Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Lari, C" sort="Lari, C" uniqKey="Lari C" first="C." last="Lari">C. 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The Rodighiero et al. catalogue includes 36 sources, making up a complete flux‐limited sample for S95 μm≥ 100 mJy. Reliable sources were detected, with decreasing but well‐controlled completeness, down to S95 μm≃ 20 mJy. We have combined mid‐infrared (IR) and radio catalogues in this area to identify the potential optical counterparts of the far‐IR sources. We found 14 radio and 13 15‐μm associations, 10 of which have both associations. For the 11 sources with spectroscopic redshift, we have performed a spectrophotometric analysis of the observed spectral energy distributions (SEDs). Four of these 95‐μm sources have been classified as faint IR (FIR) galaxies (LFIR < 1.e11 L⊙), six as luminous IR galaxies (LIRGs) and only one as an ultraluminous IR galaxy (ULIRG). We have discussed the redshift distribution of these objects, comparing our results with evolutionary model predictions 95 and 175 μm. Given their moderate distances (the bulk of the closest spectroscopically identified objects lying at z < 0.2), their luminosities and star formation rates (SFR; median value ∼ 10 M⊙ yr−1), the sources unveiled by ISOPHOT at 95 μm seem to correspond to the low redshift (z < 0.3) FIRBACK 175‐μm population, composed of dusty, star‐forming galaxies with moderate SFRs. We computed and compared different SFR estimators, and found that the SF derived from the bolometric IR luminosity is well correlated with that computed from the radio and mid‐IR fluxes.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>G. Rodighiero</name><affiliations><json:string>Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I‐35122 Padova, Italy</json:string></affiliations></json:item><json:item><name>D. 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Telephone (0131) 226 7232 Fax (0131) 226 3803</pubPlace><date type="published" when="2005-02"></date><biblScope unit="volume">357</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="449">449</biblScope><biblScope unit="page" to="460">460</biblScope></imprint></monogr><idno type="istex">71CEC35C40DACB47ED2D7CF7DA84C4DBF02CB3CB</idno><idno type="DOI">10.1111/j.1365-2966.2004.08547.x</idno><idno type="ArticleID">MNR8547</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2005</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>We present the optical identifications of a 95‐μm ISOPHOT sample in the Lockman hole over an area of approximately half a deg2. The Rodighiero et al. catalogue includes 36 sources, making up a complete flux‐limited sample for S95 μm≥ 100 mJy. Reliable sources were detected, with decreasing but well‐controlled completeness, down to S95 μm≃ 20 mJy. We have combined mid‐infrared (IR) and radio catalogues in this area to identify the potential optical counterparts of the far‐IR sources. We found 14 radio and 13 15‐μm associations, 10 of which have both associations. For the 11 sources with spectroscopic redshift, we have performed a spectrophotometric analysis of the observed spectral energy distributions (SEDs). Four of these 95‐μm sources have been classified as faint IR (FIR) galaxies (LFIR < 1.e11 L⊙), six as luminous IR galaxies (LIRGs) and only one as an ultraluminous IR galaxy (ULIRG). We have discussed the redshift distribution of these objects, comparing our results with evolutionary model predictions 95 and 175 μm. Given their moderate distances (the bulk of the closest spectroscopically identified objects lying at z < 0.2), their luminosities and star formation rates (SFR; median value ∼ 10 M⊙ yr−1), the sources unveiled by ISOPHOT at 95 μm seem to correspond to the low redshift (z < 0.3) FIRBACK 175‐μm population, composed of dusty, star‐forming galaxies with moderate SFRs. 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Received 2004 October 21; in original form 2004 June 16</unparsedEditorialHistory><countGroup><count type="figureTotal" number="11"></count><count type="tableTotal" number="2"></count><count type="formulaTotal" number="78"></count><count type="referenceTotal" number="34"></count><count type="linksCrossRef" number="110"></count></countGroup><titleGroup><title type="main">A far‐infrared view of the Lockman hole from <i>ISO</i> 95‐μm observations – II. Optical identifications and insights into the nature of the far‐infrared sources</title><title type="shortAuthors"><i>G. Rodighiero et al.</i></title><title type="short"><i>Optical identifications of the far‐IR sources</i></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1" corresponding="yes"><personName><givenNames>G.</givenNames><familyName>Rodighiero</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>D.</givenNames><familyName>Fadda</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a1"><personName><givenNames>A.</givenNames><familyName>Franceschini</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>C.</givenNames><familyName>Lari</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="IT"><unparsedAffiliation>Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I‐35122 Padova, Italy</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="US"><unparsedAffiliation>Caltech, SIRTF Science Center, MC 220‐6, Pasadena, CA 91126, USA</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="IT"><unparsedAffiliation>Istituto di Radioastronomia del CNR, via Gobetti 101, I‐40129 Bologna, Italy</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">galaxies: evolution</keyword><keyword xml:id="k2">galaxies: fundamental parameters</keyword><keyword xml:id="k3">infrared: galaxies</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">ABSTRACT</title><p>We present the optical identifications of a 95‐μm ISOPHOT sample in the Lockman hole over an area of approximately half a deg<sup>2</sup>. The Rodighiero et al. catalogue includes 36 sources, making up a complete flux‐limited sample for <span type="mathematics"><i>S</i><sub>95 μm</sub>≥ 100 mJy</span>. Reliable sources were detected, with decreasing but well‐controlled completeness, down to <span type="mathematics"><i>S</i><sub>95 μm</sub>≃ 20 mJy</span>. We have combined mid‐infrared (IR) and radio catalogues in this area to identify the potential optical counterparts of the far‐IR sources. We found 14 radio and 13 15‐μm associations, 10 of which have both associations. For the 11 sources with spectroscopic redshift, we have performed a spectrophotometric analysis of the observed spectral energy distributions (SEDs). Four of these 95‐μm sources have been classified as faint IR (FIR) galaxies <span type="mathematics">(<i>L</i><sub>FIR</sub> < 1.<i>e</i>11 L<sub>⊙</sub>)</span>, six as luminous IR galaxies (LIRGs) and only one as an ultraluminous IR galaxy (ULIRG). We have discussed the redshift distribution of these objects, comparing our results with evolutionary model predictions 95 and 175 μm. Given their moderate distances (the bulk of the closest spectroscopically identified objects lying at <span type="mathematics"><i>z</i> < 0.2</span>), their luminosities and star formation rates (SFR; median value <span type="mathematics">∼ 10 M<sub>⊙</sub> yr<sup>−1</sup></span>), the sources unveiled by ISOPHOT at 95 μm seem to correspond to the low redshift <span type="mathematics">(<i>z</i> < 0.3)</span> FIRBACK 175‐μm population, composed of dusty, star‐forming galaxies with moderate SFRs. We computed and compared different SFR estimators, and found that the SF derived from the bolometric IR luminosity is well correlated with that computed from the radio and mid‐IR fluxes.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>A far‐infrared view of the Lockman hole from ISO 95‐μm observations – II. Optical identifications and insights into the nature of the far‐infrared sources</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Optical identifications of the far‐IR sources</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>A far‐infrared view of the Lockman hole from ISO 95‐μm observations – II. Optical identifications and insights into the nature of the far‐infrared sources</title></titleInfo><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Rodighiero</namePart><affiliation>Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I‐35122 Padova, Italy</affiliation><description>Correspondence: E‐mail: </description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Fadda</namePart><affiliation>Caltech, SIRTF Science Center, MC 220‐6, Pasadena, CA 91126, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Franceschini</namePart><affiliation>Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I‐35122 Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Lari</namePart><affiliation>Istituto di Radioastronomia del CNR, via Gobetti 101, I‐40129 Bologna, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Science Ltd</publisher><place><placeTerm type="text">23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone (0131) 226 7232 Fax (0131) 226 3803</placeTerm></place><dateIssued encoding="w3cdtf">2005-02</dateIssued><edition>Accepted 2004 October 24. Received 2004 October 21; in original form 2004 June 16</edition><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">11</extent><extent unit="tables">2</extent><extent unit="formulas">78</extent><extent unit="references">34</extent></physicalDescription><abstract lang="en">We present the optical identifications of a 95‐μm ISOPHOT sample in the Lockman hole over an area of approximately half a deg2. The Rodighiero et al. catalogue includes 36 sources, making up a complete flux‐limited sample for S95 μm≥ 100 mJy. Reliable sources were detected, with decreasing but well‐controlled completeness, down to S95 μm≃ 20 mJy. We have combined mid‐infrared (IR) and radio catalogues in this area to identify the potential optical counterparts of the far‐IR sources. We found 14 radio and 13 15‐μm associations, 10 of which have both associations. For the 11 sources with spectroscopic redshift, we have performed a spectrophotometric analysis of the observed spectral energy distributions (SEDs). Four of these 95‐μm sources have been classified as faint IR (FIR) galaxies (LFIR < 1.e11 L⊙), six as luminous IR galaxies (LIRGs) and only one as an ultraluminous IR galaxy (ULIRG). We have discussed the redshift distribution of these objects, comparing our results with evolutionary model predictions 95 and 175 μm. Given their moderate distances (the bulk of the closest spectroscopically identified objects lying at z < 0.2), their luminosities and star formation rates (SFR; median value ∼ 10 M⊙ yr−1), the sources unveiled by ISOPHOT at 95 μm seem to correspond to the low redshift (z < 0.3) FIRBACK 175‐μm population, composed of dusty, star‐forming galaxies with moderate SFRs. We computed and compared different SFR estimators, and found that the SF derived from the bolometric IR luminosity is well correlated with that computed from the radio and mid‐IR fluxes.</abstract><subject lang="en"><genre>keywords</genre><topic>galaxies: evolution</topic><topic>galaxies: fundamental parameters</topic><topic>infrared: galaxies</topic></subject><relatedItem type="host"><titleInfo><title>Monthly Notices of the Royal Astronomical Society</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0035-8711</identifier><identifier type="eISSN">1365-2966</identifier><identifier type="DOI">10.1111/(ISSN)1365-2966</identifier><identifier type="PublisherID">MNR</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>357</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>449</start><end>460</end></extent></part></relatedItem><identifier type="istex">71CEC35C40DACB47ED2D7CF7DA84C4DBF02CB3CB</identifier><identifier type="DOI">10.1111/j.1365-2966.2004.08547.x</identifier><identifier type="ArticleID">MNR8547</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Science Ltd</recordOrigin></recordInfo></mods></metadata><enrichments><json:item><type>multicat</type><uri>https://api.istex.fr/document/71CEC35C40DACB47ED2D7CF7DA84C4DBF02CB3CB/enrichments/multicat</uri></json:item></enrichments><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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|texte= A far‐infrared view of the Lockman hole from ISO 95‐μm observations – II. Optical identifications and insights into the nature of the far‐infrared sources
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