LUMINOUS AND HIGH STELLAR MASS CANDIDATE GALAXIES AT z ≃ 8 DISCOVERED IN THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY
Identifieur interne : 009456 ( Main/Merge ); précédent : 009455; suivant : 009457LUMINOUS AND HIGH STELLAR MASS CANDIDATE GALAXIES AT z ≃ 8 DISCOVERED IN THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY
Auteurs : HAOJING YAN [États-Unis] ; Steven L. Finkelstein [États-Unis] ; Kuang-Han Huang [États-Unis] ; Russell E. Ryan [États-Unis] ; Henry C. Ferguson [États-Unis] ; Anton M. Koekemoer [États-Unis] ; Norman A. Grogin [États-Unis] ; Mark Dickinson [États-Unis] ; Jeffrey A. Newman [États-Unis] ; Rachel S. Somerville [États-Unis] ; Romeel Dave [États-Unis] ; S. M. Faber [États-Unis] ; Casey Papovich [États-Unis] ; YICHENG GUO [États-Unis] ; Mauro Giavalisco [États-Unis] ; Kyoung-Soo Lee [États-Unis] ; Naveen Reddy [États-Unis] ; Asantha R. Cooray [États-Unis] ; Brian D. Siana [États-Unis] ; Nimish P. Hathi [États-Unis] ; Giovanni G. Fazio [États-Unis] ; Matthew Ashby [États-Unis] ; Benjamin J. Weiner [États-Unis] ; Ray A. Lucas [États-Unis] ; Avishai Dekel [Israël] ; Laura Pentericci [Italie] ; Christopher J. Conselice [Royaume-Uni] ; Dale D. Kocevski [États-Unis] ; Kamson Lai [États-Unis]Source :
- The Astrophysical journal [ 0004-637X ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cosmologie.
English descriptors
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Abstract
One key goal of the Hubble Space Telescope Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey is to track galaxy evolution back to z ≃ 8. Its two-tiered "wide and deep" strategy bridges significant gaps in existing near-infrared surveys. Here we report on z ≃ 8 galaxy candidates selected as F105W-band dropouts in one of its deep fields, which covers 50.1 arcmin2 to 4 ks depth in each of three near-infrared bands in the Great Observatories Origins Deep Survey southern field. Two of our candidates have J < 26.2 mag, and are > 1 mag brighter than any previously known F105W-dropouts. We derive constraints on the bright end of the rest-frame ultraviolet luminosity function of galaxies at z ≃ 8, and show that the number density of such very bright objects is higher than expected from the previous Schechter luminosity function estimates at this redshift. Another two candidates are securely detected in Spitzer Infrared Array Camera images, which are the first such individual detections at z ≃ 8. Their derived stellar masses are on the order of a few x 109 M◦., from which we obtain the first measurement of the high-mass end of the galaxy stellar mass function at z ≃ 8. The high number density of very luminous and very massive galaxies at z ≃ 8, if real, could imply a large stellar-to-halo mass ratio and an efficient conversion of baryons to stars at such an early time.
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IN 47907</s2><s3>USA</s3><sZ>16 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>West Lafayette. IN 47907</wicri:noRegion></affiliation></author><author><name sortKey="Reddy, Naveen" sort="Reddy, Naveen" uniqKey="Reddy N" first="Naveen" last="Reddy">Naveen Reddy</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Department of Physics & Astronomy, University of California</s1><s2>Riverside, CA 92521</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Riverside, CA 92521</wicri:noRegion></affiliation></author><author><name sortKey="Cooray, Asantha R" sort="Cooray, Asantha R" uniqKey="Cooray A" first="Asantha R." last="Cooray">Asantha R. Cooray</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Department of Physics & Astronomy, University of California</s1><s2>Irvine, CA 92697</s2><s3>USA</s3><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Irvine, CA 92697</wicri:noRegion></affiliation></author><author><name sortKey="Siana, Brian D" sort="Siana, Brian D" uniqKey="Siana B" first="Brian D." last="Siana">Brian D. Siana</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Department of Physics & Astronomy, University of California</s1><s2>Riverside, CA 92521</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Riverside, CA 92521</wicri:noRegion></affiliation></author><author><name sortKey="Hathi, Nimish P" sort="Hathi, Nimish P" uniqKey="Hathi N" first="Nimish P." last="Hathi">Nimish P. Hathi</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Observatories of the Carnegie Institution for Science</s1><s2>Pasadena, CA 91101</s2><s3>USA</s3><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Observatories of the Carnegie Institution for Science</wicri:noRegion></affiliation></author><author><name sortKey="Fazio, Giovanni G" sort="Fazio, Giovanni G" uniqKey="Fazio G" first="Giovanni G." last="Fazio">Giovanni G. Fazio</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Harvard-Smithsonian Center for Astrophysics</s1><s2>Cambridge, MA02138</s2><s3>USA</s3><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Harvard-Smithsonian Center for Astrophysics</wicri:noRegion></affiliation></author><author><name sortKey="Ashby, Matthew" sort="Ashby, Matthew" uniqKey="Ashby M" first="Matthew" last="Ashby">Matthew Ashby</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Harvard-Smithsonian Center for Astrophysics</s1><s2>Cambridge, MA02138</s2><s3>USA</s3><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Harvard-Smithsonian Center for Astrophysics</wicri:noRegion></affiliation></author><author><name sortKey="Weiner, Benjamin J" sort="Weiner, Benjamin J" uniqKey="Weiner B" first="Benjamin J." last="Weiner">Benjamin J. Weiner</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Steward Observatory, University of Arizona</s1><s2>Tucson, AZ 85721</s2><s3>USA</s3><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Tucson, AZ 85721</wicri:noRegion></affiliation></author><author><name sortKey="Lucas, Ray A" sort="Lucas, Ray A" uniqKey="Lucas R" first="Ray A." last="Lucas">Ray A. Lucas</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Space Telescope Science Institute</wicri:noRegion></affiliation></author><author><name sortKey="Dekel, Avishai" sort="Dekel, Avishai" uniqKey="Dekel A" first="Avishai" last="Dekel">Avishai Dekel</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>Racah Institute of Physics, The Hebrew University of Jerusalem</s1><s2>Jerusalem 91904</s2><s3>ISR</s3><sZ>25 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Jerusalem 91904</wicri:noRegion></affiliation></author><author><name sortKey="Pentericci, Laura" sort="Pentericci, Laura" uniqKey="Pentericci L" first="Laura" last="Pentericci">Laura Pentericci</name><affiliation wicri:level="1"><inist:fA14 i1="19"><s1>INAF Osservatorio Astronomico di Roma</s1><s2>00040 Monteporzio (RM)</s2><s3>ITA</s3><sZ>26 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>INAF Osservatorio Astronomico di Roma</wicri:noRegion></affiliation></author><author><name sortKey="Conselice, Christopher J" sort="Conselice, Christopher J" uniqKey="Conselice C" first="Christopher J." last="Conselice">Christopher J. Conselice</name><affiliation wicri:level="4"><inist:fA14 i1="20"><s1>Centre for Astronomy and Particle Theory, University of Nottingham, University Park</s1><s2>Nottingham, NG7 2RD</s2><s3>GBR</s3><sZ>27 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Nottingham, NG7 2RD</wicri:noRegion><orgName type="university">Université de Nottingham</orgName><placeName><settlement type="city">Nottingham</settlement><region type="nation">Angleterre</region><region type="région" nuts="1">Nottinghamshire</region></placeName></affiliation></author><author><name sortKey="Kocevski, Dale D" sort="Kocevski, Dale D" uniqKey="Kocevski D" first="Dale D." last="Kocevski">Dale D. Kocevski</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>University of California Observatories/Lick Observatory, University of California</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>12 aut.</sZ><sZ>28 aut.</sZ><sZ>29 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation></author><author><name sortKey="Lai, Kamson" sort="Lai, Kamson" uniqKey="Lai K" first="Kamson" last="Lai">Kamson Lai</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>University of California Observatories/Lick Observatory, University of California</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>12 aut.</sZ><sZ>28 aut.</sZ><sZ>29 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">13-0045230</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 13-0045230 INIST</idno><idno type="RBID">Pascal:13-0045230</idno><idno type="wicri:Area/PascalFrancis/Corpus">002952</idno><idno type="wicri:Area/PascalFrancis/Curation">001F52</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">003170</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">003170</idno><idno type="wicri:doubleKey">0004-637X:2012:Haojing Yan:luminous:and:high</idno><idno type="wicri:Area/Main/Merge">009456</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">LUMINOUS AND HIGH STELLAR MASS CANDIDATE GALAXIES AT z ≃ 8 DISCOVERED IN THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY</title><author><name sortKey="Haojing Yan" sort="Haojing Yan" uniqKey="Haojing Yan" last="Haojing Yan">HAOJING YAN</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics & Astronomy, University of Missouri</s1><s2>Columbia, MO 65211</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Columbia, MO 65211</wicri:noRegion></affiliation></author><author><name sortKey="Finkelstein, Steven L" sort="Finkelstein, Steven L" uniqKey="Finkelstein S" first="Steven L." last="Finkelstein">Steven L. Finkelstein</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Department of Astronomy, The University of Texas at Austin</s1><s2>Austin, TX 78712</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">Austin (Texas)</settlement><region type="state">Texas</region></placeName><orgName type="university">Université du Texas à Austin</orgName></affiliation></author><author><name sortKey="Huang, Kuang Han" sort="Huang, Kuang Han" uniqKey="Huang K" first="Kuang-Han" last="Huang">Kuang-Han Huang</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Physics & Astronomy, Johns Hopkins University</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</wicri:noRegion></affiliation></author><author><name sortKey="Ryan, Russell E" sort="Ryan, Russell E" uniqKey="Ryan R" first="Russell E." last="Ryan">Russell E. Ryan</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Space Telescope Science Institute</wicri:noRegion></affiliation></author><author><name sortKey="Ferguson, Henry C" sort="Ferguson, Henry C" uniqKey="Ferguson H" first="Henry C." last="Ferguson">Henry C. Ferguson</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Space Telescope Science Institute</wicri:noRegion></affiliation></author><author><name sortKey="Koekemoer, Anton M" sort="Koekemoer, Anton M" uniqKey="Koekemoer A" first="Anton M." last="Koekemoer">Anton M. Koekemoer</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Space Telescope Science Institute</wicri:noRegion></affiliation></author><author><name sortKey="Grogin, Norman A" sort="Grogin, Norman A" uniqKey="Grogin N" first="Norman A." last="Grogin">Norman A. Grogin</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Space Telescope Science Institute</wicri:noRegion></affiliation></author><author><name sortKey="Dickinson, Mark" sort="Dickinson, Mark" uniqKey="Dickinson M" first="Mark" last="Dickinson">Mark Dickinson</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>National Optical Astronomy Observatory</s1><s2>Tucson. AZ 85719</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>National Optical Astronomy Observatory</wicri:noRegion></affiliation></author><author><name sortKey="Newman, Jeffrey A" sort="Newman, Jeffrey A" uniqKey="Newman J" first="Jeffrey A." last="Newman">Jeffrey A. Newman</name><affiliation wicri:level="4"><inist:fA14 i1="06"><s1>Department of Physics and Astronomy, University of Pittsburgh</s1><s2>Pittsburgh, PA 15260</s2><s3>USA</s3><sZ>9 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName><orgName type="university">Université de Pittsburgh</orgName></affiliation></author><author><name sortKey="Somerville, Rachel S" sort="Somerville, Rachel S" uniqKey="Somerville R" first="Rachel S." last="Somerville">Rachel S. Somerville</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Physics & Astronomy Department, Rutgers University</s1><s2>Piscataway, NJ 08854</s2><s3>USA</s3><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">New Brunswick (New Jersey)</settlement><region type="state">New Jersey</region></placeName><orgName type="university">Université Rutgers</orgName></affiliation></author><author><name sortKey="Dave, Romeel" sort="Dave, Romeel" uniqKey="Dave R" first="Romeel" last="Dave">Romeel Dave</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Astronomy Department, The University of Arizona</s1><s2>Tucson, AZ 85721</s2><s3>USA</s3><sZ>11 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Tucson, AZ 85721</wicri:noRegion></affiliation></author><author><name sortKey="Faber, S M" sort="Faber, S M" uniqKey="Faber S" first="S. M." last="Faber">S. M. Faber</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>University of California Observatories/Lick Observatory, University of California</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>12 aut.</sZ><sZ>28 aut.</sZ><sZ>29 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation></author><author><name sortKey="Papovich, Casey" sort="Papovich, Casey" uniqKey="Papovich C" first="Casey" last="Papovich">Casey Papovich</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University</s1><s2>College Station, TX 77843-4242</s2><s3>USA</s3><sZ>13 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>College Station, TX 77843-4242</wicri:noRegion></affiliation></author><author><name sortKey="Yicheng Guo" sort="Yicheng Guo" uniqKey="Yicheng Guo" last="Yicheng Guo">YICHENG GUO</name><affiliation wicri:level="4"><inist:fA14 i1="11"><s1>Department of Astronomy, University of Massachusetts</s1><s2>Amherst, MA 01003</s2><s3>USA</s3><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">Amherst (Massachusetts)</settlement><region type="state">Massachusetts</region></placeName><orgName type="university">Université du Massachusetts</orgName></affiliation></author><author><name sortKey="Giavalisco, Mauro" sort="Giavalisco, Mauro" uniqKey="Giavalisco M" first="Mauro" last="Giavalisco">Mauro Giavalisco</name><affiliation wicri:level="4"><inist:fA14 i1="11"><s1>Department of Astronomy, University of Massachusetts</s1><s2>Amherst, MA 01003</s2><s3>USA</s3><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">Amherst (Massachusetts)</settlement><region type="state">Massachusetts</region></placeName><orgName type="university">Université du Massachusetts</orgName></affiliation></author><author><name sortKey="Lee, Kyoung Soo" sort="Lee, Kyoung Soo" uniqKey="Lee K" first="Kyoung-Soo" last="Lee">Kyoung-Soo Lee</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>Department of Physics, Purdue University</s1><s2>West Lafayette. IN 47907</s2><s3>USA</s3><sZ>16 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>West Lafayette. IN 47907</wicri:noRegion></affiliation></author><author><name sortKey="Reddy, Naveen" sort="Reddy, Naveen" uniqKey="Reddy N" first="Naveen" last="Reddy">Naveen Reddy</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Department of Physics & Astronomy, University of California</s1><s2>Riverside, CA 92521</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Riverside, CA 92521</wicri:noRegion></affiliation></author><author><name sortKey="Cooray, Asantha R" sort="Cooray, Asantha R" uniqKey="Cooray A" first="Asantha R." last="Cooray">Asantha R. Cooray</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Department of Physics & Astronomy, University of California</s1><s2>Irvine, CA 92697</s2><s3>USA</s3><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Irvine, CA 92697</wicri:noRegion></affiliation></author><author><name sortKey="Siana, Brian D" sort="Siana, Brian D" uniqKey="Siana B" first="Brian D." last="Siana">Brian D. Siana</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Department of Physics & Astronomy, University of California</s1><s2>Riverside, CA 92521</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Riverside, CA 92521</wicri:noRegion></affiliation></author><author><name sortKey="Hathi, Nimish P" sort="Hathi, Nimish P" uniqKey="Hathi N" first="Nimish P." last="Hathi">Nimish P. Hathi</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Observatories of the Carnegie Institution for Science</s1><s2>Pasadena, CA 91101</s2><s3>USA</s3><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Observatories of the Carnegie Institution for Science</wicri:noRegion></affiliation></author><author><name sortKey="Fazio, Giovanni G" sort="Fazio, Giovanni G" uniqKey="Fazio G" first="Giovanni G." last="Fazio">Giovanni G. Fazio</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Harvard-Smithsonian Center for Astrophysics</s1><s2>Cambridge, MA02138</s2><s3>USA</s3><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Harvard-Smithsonian Center for Astrophysics</wicri:noRegion></affiliation></author><author><name sortKey="Ashby, Matthew" sort="Ashby, Matthew" uniqKey="Ashby M" first="Matthew" last="Ashby">Matthew Ashby</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Harvard-Smithsonian Center for Astrophysics</s1><s2>Cambridge, MA02138</s2><s3>USA</s3><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Harvard-Smithsonian Center for Astrophysics</wicri:noRegion></affiliation></author><author><name sortKey="Weiner, Benjamin J" sort="Weiner, Benjamin J" uniqKey="Weiner B" first="Benjamin J." last="Weiner">Benjamin J. Weiner</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Steward Observatory, University of Arizona</s1><s2>Tucson, AZ 85721</s2><s3>USA</s3><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Tucson, AZ 85721</wicri:noRegion></affiliation></author><author><name sortKey="Lucas, Ray A" sort="Lucas, Ray A" uniqKey="Lucas R" first="Ray A." last="Lucas">Ray A. Lucas</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Space Telescope Science Institute</wicri:noRegion></affiliation></author><author><name sortKey="Dekel, Avishai" sort="Dekel, Avishai" uniqKey="Dekel A" first="Avishai" last="Dekel">Avishai Dekel</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>Racah Institute of Physics, The Hebrew University of Jerusalem</s1><s2>Jerusalem 91904</s2><s3>ISR</s3><sZ>25 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Jerusalem 91904</wicri:noRegion></affiliation></author><author><name sortKey="Pentericci, Laura" sort="Pentericci, Laura" uniqKey="Pentericci L" first="Laura" last="Pentericci">Laura Pentericci</name><affiliation wicri:level="1"><inist:fA14 i1="19"><s1>INAF Osservatorio Astronomico di Roma</s1><s2>00040 Monteporzio (RM)</s2><s3>ITA</s3><sZ>26 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>INAF Osservatorio Astronomico di Roma</wicri:noRegion></affiliation></author><author><name sortKey="Conselice, Christopher J" sort="Conselice, Christopher J" uniqKey="Conselice C" first="Christopher J." last="Conselice">Christopher J. Conselice</name><affiliation wicri:level="4"><inist:fA14 i1="20"><s1>Centre for Astronomy and Particle Theory, University of Nottingham, University Park</s1><s2>Nottingham, NG7 2RD</s2><s3>GBR</s3><sZ>27 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Nottingham, NG7 2RD</wicri:noRegion><orgName type="university">Université de Nottingham</orgName><placeName><settlement type="city">Nottingham</settlement><region type="nation">Angleterre</region><region type="région" nuts="1">Nottinghamshire</region></placeName></affiliation></author><author><name sortKey="Kocevski, Dale D" sort="Kocevski, Dale D" uniqKey="Kocevski D" first="Dale D." last="Kocevski">Dale D. Kocevski</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>University of California Observatories/Lick Observatory, University of California</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>12 aut.</sZ><sZ>28 aut.</sZ><sZ>29 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation></author><author><name sortKey="Lai, Kamson" sort="Lai, Kamson" uniqKey="Lai K" first="Kamson" last="Lai">Kamson Lai</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>University of California Observatories/Lick Observatory, University of California</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>12 aut.</sZ><sZ>28 aut.</sZ><sZ>29 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></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="2012">2012</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>Baryon star</term><term>Cosmology</term><term>Galaxies</term><term>Galaxy evolution</term><term>High density</term><term>Infrared surveys</term><term>Luminosity function</term><term>Mass function</term><term>Mass ratio</term><term>Red shift</term><term>Spatial observatory</term><term>Stellar mass</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Masse stellaire</term><term>Galaxies</term><term>Observatoire spatial</term><term>Evolution galaxies</term><term>Etude IR</term><term>Fonction luminosité</term><term>Déplacement vers le rouge</term><term>Fonction masse</term><term>Densité élevée</term><term>Rapport masse</term><term>Etoile baryon</term><term>Cosmologie</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cosmologie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">One key goal of the Hubble Space Telescope Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey is to track galaxy evolution back to z ≃ 8. Its two-tiered "wide and deep" strategy bridges significant gaps in existing near-infrared surveys. Here we report on z ≃ 8 galaxy candidates selected as F105W-band dropouts in one of its deep fields, which covers 50.1 arcmin<sup>2</sup> to 4 ks depth in each of three near-infrared bands in the Great Observatories Origins Deep Survey southern field. Two of our candidates have J < 26.2 mag, and are > 1 mag brighter than any previously known F105W-dropouts. We derive constraints on the bright end of the rest-frame ultraviolet luminosity function of galaxies at z ≃ 8, and show that the number density of such very bright objects is higher than expected from the previous Schechter luminosity function estimates at this redshift. Another two candidates are securely detected in Spitzer Infrared Array Camera images, which are the first such individual detections at z ≃ 8. Their derived stellar masses are on the order of a few x 10<sup>9</sup> M<sub>◦.</sub>, from which we obtain the first measurement of the high-mass end of the galaxy stellar mass function at z ≃ 8. The high number density of very luminous and very massive galaxies at z ≃ 8, if real, could imply a large stellar-to-halo mass ratio and an efficient conversion of baryons to stars at such an early time.</div></front></TEI><affiliations><list><country><li>Israël</li><li>Italie</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Angleterre</li><li>Massachusetts</li><li>New Jersey</li><li>Nottinghamshire</li><li>Pennsylvanie</li><li>Texas</li></region><settlement><li>Amherst (Massachusetts)</li><li>Austin (Texas)</li><li>New Brunswick (New Jersey)</li><li>Nottingham</li><li>Pittsburgh</li></settlement><orgName><li>Université Rutgers</li><li>Université de Nottingham</li><li>Université de Pittsburgh</li><li>Université du Massachusetts</li><li>Université du Texas à Austin</li></orgName></list><tree><country name="États-Unis"><noRegion><name sortKey="Haojing Yan" sort="Haojing Yan" uniqKey="Haojing Yan" last="Haojing Yan">HAOJING YAN</name></noRegion><name sortKey="Ashby, Matthew" sort="Ashby, Matthew" uniqKey="Ashby M" first="Matthew" last="Ashby">Matthew Ashby</name><name sortKey="Cooray, Asantha R" sort="Cooray, Asantha R" uniqKey="Cooray A" first="Asantha R." last="Cooray">Asantha R. Cooray</name><name sortKey="Dave, Romeel" sort="Dave, Romeel" uniqKey="Dave R" first="Romeel" last="Dave">Romeel Dave</name><name sortKey="Dickinson, Mark" sort="Dickinson, Mark" uniqKey="Dickinson M" first="Mark" last="Dickinson">Mark Dickinson</name><name sortKey="Faber, S M" sort="Faber, S M" uniqKey="Faber S" first="S. M." last="Faber">S. M. Faber</name><name sortKey="Fazio, Giovanni G" sort="Fazio, Giovanni G" uniqKey="Fazio G" first="Giovanni G." last="Fazio">Giovanni G. Fazio</name><name sortKey="Ferguson, Henry C" sort="Ferguson, Henry C" uniqKey="Ferguson H" first="Henry C." last="Ferguson">Henry C. Ferguson</name><name sortKey="Finkelstein, Steven L" sort="Finkelstein, Steven L" uniqKey="Finkelstein S" first="Steven L." last="Finkelstein">Steven L. Finkelstein</name><name sortKey="Giavalisco, Mauro" sort="Giavalisco, Mauro" uniqKey="Giavalisco M" first="Mauro" last="Giavalisco">Mauro Giavalisco</name><name sortKey="Grogin, Norman A" sort="Grogin, Norman A" uniqKey="Grogin N" first="Norman A." last="Grogin">Norman A. Grogin</name><name sortKey="Hathi, Nimish P" sort="Hathi, Nimish P" uniqKey="Hathi N" first="Nimish P." last="Hathi">Nimish P. Hathi</name><name sortKey="Huang, Kuang Han" sort="Huang, Kuang Han" uniqKey="Huang K" first="Kuang-Han" last="Huang">Kuang-Han Huang</name><name sortKey="Kocevski, Dale D" sort="Kocevski, Dale D" uniqKey="Kocevski D" first="Dale D." last="Kocevski">Dale D. Kocevski</name><name sortKey="Koekemoer, Anton M" sort="Koekemoer, Anton M" uniqKey="Koekemoer A" first="Anton M." last="Koekemoer">Anton M. Koekemoer</name><name sortKey="Lai, Kamson" sort="Lai, Kamson" uniqKey="Lai K" first="Kamson" last="Lai">Kamson Lai</name><name sortKey="Lee, Kyoung Soo" sort="Lee, Kyoung Soo" uniqKey="Lee K" first="Kyoung-Soo" last="Lee">Kyoung-Soo Lee</name><name sortKey="Lucas, Ray A" sort="Lucas, Ray A" uniqKey="Lucas R" first="Ray A." last="Lucas">Ray A. Lucas</name><name sortKey="Newman, Jeffrey A" sort="Newman, Jeffrey A" uniqKey="Newman J" first="Jeffrey A." last="Newman">Jeffrey A. Newman</name><name sortKey="Papovich, Casey" sort="Papovich, Casey" uniqKey="Papovich C" first="Casey" last="Papovich">Casey Papovich</name><name sortKey="Reddy, Naveen" sort="Reddy, Naveen" uniqKey="Reddy N" first="Naveen" last="Reddy">Naveen Reddy</name><name sortKey="Ryan, Russell E" sort="Ryan, Russell E" uniqKey="Ryan R" first="Russell E." last="Ryan">Russell E. Ryan</name><name sortKey="Siana, Brian D" sort="Siana, Brian D" uniqKey="Siana B" first="Brian D." last="Siana">Brian D. Siana</name><name sortKey="Somerville, Rachel S" sort="Somerville, Rachel S" uniqKey="Somerville R" first="Rachel S." last="Somerville">Rachel S. Somerville</name><name sortKey="Weiner, Benjamin J" sort="Weiner, Benjamin J" uniqKey="Weiner B" first="Benjamin J." last="Weiner">Benjamin J. Weiner</name><name sortKey="Yicheng Guo" sort="Yicheng Guo" uniqKey="Yicheng Guo" last="Yicheng Guo">YICHENG GUO</name></country><country name="Israël"><noRegion><name sortKey="Dekel, Avishai" sort="Dekel, Avishai" uniqKey="Dekel A" first="Avishai" last="Dekel">Avishai Dekel</name></noRegion></country><country name="Italie"><noRegion><name sortKey="Pentericci, Laura" sort="Pentericci, Laura" uniqKey="Pentericci L" first="Laura" last="Pentericci">Laura Pentericci</name></noRegion></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Conselice, Christopher J" sort="Conselice, Christopher J" uniqKey="Conselice C" first="Christopher J." last="Conselice">Christopher J. 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|texte= LUMINOUS AND HIGH STELLAR MASS CANDIDATE GALAXIES AT z ≃ 8 DISCOVERED IN THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY
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