PROBING THE PHYSICAL PROPERTIES OF z = 4.5 Ly α EMITTERS WITH SPITZER
We present the results from a stellar population modeling analysis of a sample of 162 z = 4.5 and 14 z = 5.7 Ly alpha emitting galaxies (LAEs) in the Bootes field, using deep Spitzer/IRAC data at 3.6 and 4.5 mu m from the Spitzer Ly alpha Survey, along with Hubble Space Telescope NICMOS and WFC3 ima...
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| Veröffentlicht in: | The Astrophysical journal 2015-11, Vol.813 (1), p.78 |
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| creator | Finkelstein, Keely D Finkelstein, Steven L Tilvi, Vithal Malhotra, Sangeeta Rhoads, James E Grogin, Norman A Pirzkal, Norbert Dey, Arjun Jannuzi, Buell T Mobasher, Bahram Pakzad, Sabrina Salmon, Brett Wang, Junxian |
| description | We present the results from a stellar population modeling analysis of a sample of 162 z = 4.5 and 14 z = 5.7 Ly alpha emitting galaxies (LAEs) in the Bootes field, using deep Spitzer/IRAC data at 3.6 and 4.5 mu m from the Spitzer Ly alpha Survey, along with Hubble Space Telescope NICMOS and WFC3 imaging at 1.1 and 1.6 mu m for a subset of the LAEs. This represents one of the largest samples of high-redshift LAEs imaged with Spitzer IRAC. We find that 30/162 (19%) of the z = 4.5 LAEs and 9/14 (64%) of the z = 5.7 LAEs are detected at > or =3 alpha in at least one IRAC band. Individual z = 4.5 IRAC-detected LAEs have a large range of stellar mass, from 5 x 10 super(8)-10 super(11) M sub([middot in circle]). One-third of the IRAC-detected LAEs have older stellar population ages of 100 Myr-1 Gyr, while the remainder have ages |
| doi_str_mv | 10.1088/0004-637X/813/1/78 |
| format | Article |
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This represents one of the largest samples of high-redshift LAEs imaged with Spitzer IRAC. We find that 30/162 (19%) of the z = 4.5 LAEs and 9/14 (64%) of the z = 5.7 LAEs are detected at > or =3 alpha in at least one IRAC band. Individual z = 4.5 IRAC-detected LAEs have a large range of stellar mass, from 5 x 10 super(8)-10 super(11) M sub([middot in circle]). One-third of the IRAC-detected LAEs have older stellar population ages of 100 Myr-1 Gyr, while the remainder have ages <100 Myr. A stacking analysis of IRAC-undetected LAEs shows this population to be primarily low mass (8-20 x 10 super(8) M sub([middot in circle])) and young (64-570 Myr). We find a correlation between stellar mass and the dust-corrected ultraviolet-based star formation rate (SFR) similar to that at lower redshifts, in that higher mass galaxies exhibit higher SFRs. However, the z = 4.5 LAE correlation is elevated 4-5 times in SFR compared to continuum-selected galaxies at similar redshifts. The exception is the most massive LAEs which have SFRs similar to galaxies at lower redshifts suggesting that they may represent a different population of galaxies than the traditional lower-mass LAEs, perhaps with a different mechanism promoting Ly alpha photon escape.</description><identifier>ISSN: 1538-4357</identifier><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/813/1/78</identifier><language>eng</language><publisher>United Kingdom</publisher><subject>Age ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; COMPARATIVE EVALUATIONS ; COMPUTERIZED SIMULATION ; Correlation ; COSMIC DUST ; GALACTIC EVOLUTION ; GALAXIES ; MASS ; PHOTONS ; Physical properties ; POPULATIONS ; RED SHIFT ; SPACE ; STARS ; Stellar mass ; Stellar populations ; TELESCOPES ; ULTRAVIOLET RADIATION</subject><ispartof>The Astrophysical journal, 2015-11, Vol.813 (1), p.78</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c341t-9a18c2291af74070f5e5fd7e4da66e35a571fbdc666edc247a635fd3bb3b62c33</citedby><cites>FETCH-LOGICAL-c341t-9a18c2291af74070f5e5fd7e4da66e35a571fbdc666edc247a635fd3bb3b62c33</cites><orcidid>0000-0003-0792-5877 ; 0000-0001-8514-7105 ; 0000-0001-9440-8872 ; 0000-0002-4928-4003 ; 0000-0002-7453-7279 ; 0000-0002-9226-5350 ; 0000-0002-4419-6434</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22882444$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Finkelstein, Keely D</creatorcontrib><creatorcontrib>Finkelstein, Steven L</creatorcontrib><creatorcontrib>Tilvi, Vithal</creatorcontrib><creatorcontrib>Malhotra, Sangeeta</creatorcontrib><creatorcontrib>Rhoads, James E</creatorcontrib><creatorcontrib>Grogin, Norman A</creatorcontrib><creatorcontrib>Pirzkal, Norbert</creatorcontrib><creatorcontrib>Dey, Arjun</creatorcontrib><creatorcontrib>Jannuzi, Buell T</creatorcontrib><creatorcontrib>Mobasher, Bahram</creatorcontrib><creatorcontrib>Pakzad, Sabrina</creatorcontrib><creatorcontrib>Salmon, Brett</creatorcontrib><creatorcontrib>Wang, Junxian</creatorcontrib><title>PROBING THE PHYSICAL PROPERTIES OF z = 4.5 Ly α EMITTERS WITH SPITZER</title><title>The Astrophysical journal</title><description>We present the results from a stellar population modeling analysis of a sample of 162 z = 4.5 and 14 z = 5.7 Ly alpha emitting galaxies (LAEs) in the Bootes field, using deep Spitzer/IRAC data at 3.6 and 4.5 mu m from the Spitzer Ly alpha Survey, along with Hubble Space Telescope NICMOS and WFC3 imaging at 1.1 and 1.6 mu m for a subset of the LAEs. This represents one of the largest samples of high-redshift LAEs imaged with Spitzer IRAC. We find that 30/162 (19%) of the z = 4.5 LAEs and 9/14 (64%) of the z = 5.7 LAEs are detected at > or =3 alpha in at least one IRAC band. Individual z = 4.5 IRAC-detected LAEs have a large range of stellar mass, from 5 x 10 super(8)-10 super(11) M sub([middot in circle]). One-third of the IRAC-detected LAEs have older stellar population ages of 100 Myr-1 Gyr, while the remainder have ages <100 Myr. A stacking analysis of IRAC-undetected LAEs shows this population to be primarily low mass (8-20 x 10 super(8) M sub([middot in circle])) and young (64-570 Myr). We find a correlation between stellar mass and the dust-corrected ultraviolet-based star formation rate (SFR) similar to that at lower redshifts, in that higher mass galaxies exhibit higher SFRs. However, the z = 4.5 LAE correlation is elevated 4-5 times in SFR compared to continuum-selected galaxies at similar redshifts. The exception is the most massive LAEs which have SFRs similar to galaxies at lower redshifts suggesting that they may represent a different population of galaxies than the traditional lower-mass LAEs, perhaps with a different mechanism promoting Ly alpha photon escape.</description><subject>Age</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>COMPARATIVE EVALUATIONS</subject><subject>COMPUTERIZED SIMULATION</subject><subject>Correlation</subject><subject>COSMIC DUST</subject><subject>GALACTIC EVOLUTION</subject><subject>GALAXIES</subject><subject>MASS</subject><subject>PHOTONS</subject><subject>Physical properties</subject><subject>POPULATIONS</subject><subject>RED SHIFT</subject><subject>SPACE</subject><subject>STARS</subject><subject>Stellar mass</subject><subject>Stellar populations</subject><subject>TELESCOPES</subject><subject>ULTRAVIOLET RADIATION</subject><issn>1538-4357</issn><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkctOg0AYRidGE2v1BVxN4sYNhbkPCxfa0EJSLQGMl80EhiFi2lIZuqhv5Yv4TELqwqWr_5KTb_EdAC6RN0GelK7nedThRDy7EhEXuUIegRFiRDqUMHH8Zz8FZ9a-Dzz2_RGYxcnyLnqYwywMYBy-pNH0dgH7ZxwkWRSkcDmDn_AG0gmDiz38_oLBfZRlQZLCpygLYRpH2WuQnIOTKl9Zc_E7x-BxFmTT0Fks50OiowlFnePnSGqMfZRXgnrCq5hhVSkMLXPODWE5E6gqSs37q9SYipyTHiBFQQqONSFjcHXIbWxXK6vrzug33Ww2RncKYykxpbSnrg_Utm0-dsZ2al1bbVarfGOanVVISI54X4D8B8qZLwTzcY_iA6rbxtrWVGrb1uu83SvkqcGCGlpVgwXVW1BICUl-AHSsc1I</recordid><startdate>20151101</startdate><enddate>20151101</enddate><creator>Finkelstein, Keely D</creator><creator>Finkelstein, Steven L</creator><creator>Tilvi, Vithal</creator><creator>Malhotra, Sangeeta</creator><creator>Rhoads, James E</creator><creator>Grogin, Norman A</creator><creator>Pirzkal, Norbert</creator><creator>Dey, Arjun</creator><creator>Jannuzi, Buell T</creator><creator>Mobasher, Bahram</creator><creator>Pakzad, Sabrina</creator><creator>Salmon, Brett</creator><creator>Wang, Junxian</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0003-0792-5877</orcidid><orcidid>https://orcid.org/0000-0001-8514-7105</orcidid><orcidid>https://orcid.org/0000-0001-9440-8872</orcidid><orcidid>https://orcid.org/0000-0002-4928-4003</orcidid><orcidid>https://orcid.org/0000-0002-7453-7279</orcidid><orcidid>https://orcid.org/0000-0002-9226-5350</orcidid><orcidid>https://orcid.org/0000-0002-4419-6434</orcidid></search><sort><creationdate>20151101</creationdate><title>PROBING THE PHYSICAL PROPERTIES OF z = 4.5 Ly α EMITTERS WITH SPITZER</title><author>Finkelstein, Keely D ; Finkelstein, Steven L ; Tilvi, Vithal ; Malhotra, Sangeeta ; Rhoads, James E ; Grogin, Norman A ; Pirzkal, Norbert ; Dey, Arjun ; Jannuzi, Buell T ; Mobasher, Bahram ; Pakzad, Sabrina ; Salmon, Brett ; Wang, Junxian</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c341t-9a18c2291af74070f5e5fd7e4da66e35a571fbdc666edc247a635fd3bb3b62c33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Age</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>COMPARATIVE EVALUATIONS</topic><topic>COMPUTERIZED SIMULATION</topic><topic>Correlation</topic><topic>COSMIC DUST</topic><topic>GALACTIC EVOLUTION</topic><topic>GALAXIES</topic><topic>MASS</topic><topic>PHOTONS</topic><topic>Physical properties</topic><topic>POPULATIONS</topic><topic>RED SHIFT</topic><topic>SPACE</topic><topic>STARS</topic><topic>Stellar mass</topic><topic>Stellar populations</topic><topic>TELESCOPES</topic><topic>ULTRAVIOLET RADIATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Finkelstein, Keely D</creatorcontrib><creatorcontrib>Finkelstein, Steven L</creatorcontrib><creatorcontrib>Tilvi, Vithal</creatorcontrib><creatorcontrib>Malhotra, Sangeeta</creatorcontrib><creatorcontrib>Rhoads, James E</creatorcontrib><creatorcontrib>Grogin, Norman A</creatorcontrib><creatorcontrib>Pirzkal, Norbert</creatorcontrib><creatorcontrib>Dey, Arjun</creatorcontrib><creatorcontrib>Jannuzi, Buell T</creatorcontrib><creatorcontrib>Mobasher, Bahram</creatorcontrib><creatorcontrib>Pakzad, Sabrina</creatorcontrib><creatorcontrib>Salmon, Brett</creatorcontrib><creatorcontrib>Wang, Junxian</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Finkelstein, Keely D</au><au>Finkelstein, Steven L</au><au>Tilvi, Vithal</au><au>Malhotra, Sangeeta</au><au>Rhoads, James E</au><au>Grogin, Norman A</au><au>Pirzkal, Norbert</au><au>Dey, Arjun</au><au>Jannuzi, Buell T</au><au>Mobasher, Bahram</au><au>Pakzad, Sabrina</au><au>Salmon, Brett</au><au>Wang, Junxian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>PROBING THE PHYSICAL PROPERTIES OF z = 4.5 Ly α EMITTERS WITH SPITZER</atitle><jtitle>The Astrophysical journal</jtitle><date>2015-11-01</date><risdate>2015</risdate><volume>813</volume><issue>1</issue><spage>78</spage><pages>78-</pages><issn>1538-4357</issn><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present the results from a stellar population modeling analysis of a sample of 162 z = 4.5 and 14 z = 5.7 Ly alpha emitting galaxies (LAEs) in the Bootes field, using deep Spitzer/IRAC data at 3.6 and 4.5 mu m from the Spitzer Ly alpha Survey, along with Hubble Space Telescope NICMOS and WFC3 imaging at 1.1 and 1.6 mu m for a subset of the LAEs. This represents one of the largest samples of high-redshift LAEs imaged with Spitzer IRAC. We find that 30/162 (19%) of the z = 4.5 LAEs and 9/14 (64%) of the z = 5.7 LAEs are detected at > or =3 alpha in at least one IRAC band. Individual z = 4.5 IRAC-detected LAEs have a large range of stellar mass, from 5 x 10 super(8)-10 super(11) M sub([middot in circle]). One-third of the IRAC-detected LAEs have older stellar population ages of 100 Myr-1 Gyr, while the remainder have ages <100 Myr. A stacking analysis of IRAC-undetected LAEs shows this population to be primarily low mass (8-20 x 10 super(8) M sub([middot in circle])) and young (64-570 Myr). We find a correlation between stellar mass and the dust-corrected ultraviolet-based star formation rate (SFR) similar to that at lower redshifts, in that higher mass galaxies exhibit higher SFRs. However, the z = 4.5 LAE correlation is elevated 4-5 times in SFR compared to continuum-selected galaxies at similar redshifts. The exception is the most massive LAEs which have SFRs similar to galaxies at lower redshifts suggesting that they may represent a different population of galaxies than the traditional lower-mass LAEs, perhaps with a different mechanism promoting Ly alpha photon escape.</abstract><cop>United Kingdom</cop><doi>10.1088/0004-637X/813/1/78</doi><orcidid>https://orcid.org/0000-0003-0792-5877</orcidid><orcidid>https://orcid.org/0000-0001-8514-7105</orcidid><orcidid>https://orcid.org/0000-0001-9440-8872</orcidid><orcidid>https://orcid.org/0000-0002-4928-4003</orcidid><orcidid>https://orcid.org/0000-0002-7453-7279</orcidid><orcidid>https://orcid.org/0000-0002-9226-5350</orcidid><orcidid>https://orcid.org/0000-0002-4419-6434</orcidid></addata></record> |
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| subjects | Age ASTROPHYSICS, COSMOLOGY AND ASTRONOMY COMPARATIVE EVALUATIONS COMPUTERIZED SIMULATION Correlation COSMIC DUST GALACTIC EVOLUTION GALAXIES MASS PHOTONS Physical properties POPULATIONS RED SHIFT SPACE STARS Stellar mass Stellar populations TELESCOPES ULTRAVIOLET RADIATION |
| title | PROBING THE PHYSICAL PROPERTIES OF z = 4.5 Ly α EMITTERS WITH SPITZER |
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