A multiply imaged, submillimetre‐selected ultraluminous infrared galaxy in a galaxy group at z∼ 2.5
Identifieur interne : 000053 ( France/Analysis ); précédent : 000052; suivant : 000054A multiply imaged, submillimetre‐selected ultraluminous infrared galaxy in a galaxy group at z∼ 2.5
Auteurs : Jean-Paul Kneib [États-Unis, France] ; Paul P. Van Der Werf [Pays-Bas] ; Kirsten Kraiberg Knudsen [Pays-Bas] ; Ian Smail ; Andrew Blain [États-Unis] ; Dave Frayer [États-Unis] ; Vicki Barnard [États-Unis] ; Rob IvisonSource :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2004-04.
English descriptors
- KwdEn :
Abstract
We present observations of a remarkable submillimetre‐selected galaxy, SMM J16359+6612. This distant galaxy lies behind the core of a massive cluster of galaxies, A 2218, and is gravitationally lensed by the foreground cluster into three discrete images which were identified in deep submillimetre maps of the cluster core at both 450 and 850 μm. Subsequent follow‐up investigations using deep optical and near‐infrared (NIR) images identify a faint counterpart to each of the three images, with similar red optical–NIR colours and Hubble Space Telescope morphologies. By exploiting a detailed mass model for the cluster lens we estimate that the combined images of this galaxy are magnified by a factor of ∼45, implying that this galaxy would have unlensed magnitudes Ks= 22.9 and I= 26.1, and an unlensed 850‐μm flux density of only 0.8 mJy. Moreover, the highly constrained lens model predicted the redshift of SMM J16359+6612 to be z= 2.6 ± 0.4. We confirm this estimate using deep optical and NIR Keck spectroscopy, measuring a redshift of z= 2.516. SMM J16359+6612 is the faintest submillimetre (submm)‐selected galaxy so far identified with a precise redshift. Thanks to the large gravitational magnification of this source, we identify three sub‐components in this submm galaxy, which are also seen in the Near Infrared Spectrograph (NIRSPEC) data, arguing for either a strong dust (lane) absorption or a merger. Interestingly, there are two other highly amplified galaxies at almost identical redshifts in this field (although neither is a strong submm emitter). The three galaxies lie within a ∼100‐kpc region on the background sky, suggesting this submm galaxy is located in a dense high‐redshift group.
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DOI: 10.1111/j.1365-2966.2004.07618.x
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Van Der Werf</name></author><author><name sortKey="Kraiberg Knudsen, Kirsten" sort="Kraiberg Knudsen, Kirsten" uniqKey="Kraiberg Knudsen K" first="Kirsten" last="Kraiberg Knudsen">Kirsten Kraiberg Knudsen</name></author><author><name sortKey="Smail, Ian" sort="Smail, Ian" uniqKey="Smail I" first="Ian" last="Smail">Ian Smail</name></author><author><name sortKey="Blain, Andrew" sort="Blain, Andrew" uniqKey="Blain A" first="Andrew" last="Blain">Andrew Blain</name></author><author><name sortKey="Frayer, Dave" sort="Frayer, Dave" uniqKey="Frayer D" first="Dave" last="Frayer">Dave Frayer</name></author><author><name sortKey="Barnard, Vicki" sort="Barnard, Vicki" uniqKey="Barnard V" first="Vicki" last="Barnard">Vicki Barnard</name></author><author><name sortKey="Ivison, Rob" sort="Ivison, Rob" uniqKey="Ivison R" first="Rob" last="Ivison">Rob Ivison</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:0B4D65D241C48AB69DEC6B87357AD0E607E0E024</idno><date when="2004" year="2004">2004</date><idno type="doi">10.1111/j.1365-2966.2004.07618.x</idno><idno type="url">https://api.istex.fr/document/0B4D65D241C48AB69DEC6B87357AD0E607E0E024/fulltext/pdf</idno><idno type="wicri:Area/Main/Corpus">000486</idno><idno type="wicri:Area/Main/Curation">000486</idno><idno type="wicri:Area/Main/Exploration">000348</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Exploration">000348</idno><idno type="wicri:Area/France/Extraction">000053</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">A multiply imaged, submillimetre‐selected ultraluminous infrared galaxy in a galaxy group at z∼ 2.5</title><author><name sortKey="Kneib, Jean Aul" sort="Kneib, Jean Aul" uniqKey="Kneib J" first="Jean-Paul" last="Kneib">Jean-Paul Kneib</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Caltech‐Astronomy, MC105‐24, Pasadena, CA 91125</wicri:regionArea><wicri:noRegion>CA 91125</wicri:noRegion></affiliation><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Observatoire Midi‐Pyrénées, CNRS‐UMR5572, 14 Avenue E. 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A'ohoku Place, Hilo, HI 96720</wicri:regionArea><wicri:noRegion>HI 96720</wicri:noRegion></affiliation></author><author><name sortKey="Ivison, Rob" sort="Ivison, Rob" uniqKey="Ivison R" first="Rob" last="Ivison">Rob Ivison</name><affiliation><wicri:noCountry code="subField">3HJ</wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j">Monthly Notices of the Royal Astronomical Society</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone (0131) 226 7232 Fax (0131) 226 3803</pubPlace><date type="published" when="2004-04">2004-04</date><biblScope unit="volume">349</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="1211">1211</biblScope><biblScope unit="page" to="1217">1217</biblScope></imprint><idno type="ISSN">0035-8711</idno></series><idno type="istex">0B4D65D241C48AB69DEC6B87357AD0E607E0E024</idno><idno type="DOI">10.1111/j.1365-2966.2004.07618.x</idno><idno type="ArticleID">MNR7618</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>cosmology: observations</term><term>galaxies: clusters: individual: A 2218</term><term>galaxies: evolution</term><term>galaxies: individual: SMM J16359+6612</term><term>galaxies: starburst</term><term>infrared: galaxies</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present observations of a remarkable submillimetre‐selected galaxy, SMM J16359+6612. This distant galaxy lies behind the core of a massive cluster of galaxies, A 2218, and is gravitationally lensed by the foreground cluster into three discrete images which were identified in deep submillimetre maps of the cluster core at both 450 and 850 μm. Subsequent follow‐up investigations using deep optical and near‐infrared (NIR) images identify a faint counterpart to each of the three images, with similar red optical–NIR colours and Hubble Space Telescope morphologies. By exploiting a detailed mass model for the cluster lens we estimate that the combined images of this galaxy are magnified by a factor of ∼45, implying that this galaxy would have unlensed magnitudes Ks= 22.9 and I= 26.1, and an unlensed 850‐μm flux density of only 0.8 mJy. Moreover, the highly constrained lens model predicted the redshift of SMM J16359+6612 to be z= 2.6 ± 0.4. We confirm this estimate using deep optical and NIR Keck spectroscopy, measuring a redshift of z= 2.516. SMM J16359+6612 is the faintest submillimetre (submm)‐selected galaxy so far identified with a precise redshift. Thanks to the large gravitational magnification of this source, we identify three sub‐components in this submm galaxy, which are also seen in the Near Infrared Spectrograph (NIRSPEC) data, arguing for either a strong dust (lane) absorption or a merger. Interestingly, there are two other highly amplified galaxies at almost identical redshifts in this field (although neither is a strong submm emitter). 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Van Der Werf</name></noRegion><name sortKey="Kraiberg Knudsen, Kirsten" sort="Kraiberg Knudsen, Kirsten" uniqKey="Kraiberg Knudsen K" first="Kirsten" last="Kraiberg Knudsen">Kirsten Kraiberg Knudsen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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