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SHARDS: stellar populations and star formation histories of a mass-selected sample of 0.65 < z < 1.1 galaxies
We report on results from the analysis of a stellar mass-selected (log (M */M) ≥ 9.0) sample of 1644 galaxies at 0.65 < z < 1.1 with ultradeep (mAB < 26.5) optical medium-band (R ∼ 50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of...
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Published in: | Monthly notices of the Royal Astronomical Society 2013-09, Vol.434 (3), p.2136-2152 |
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creator | Hernán-Caballero, Antonio Alonso-Herrero, Almudena Pérez-González, Pablo G. Cardiel, Nicolás Cava, Antonio Ferreras, Ignacio Barro, Guillermo Tresse, Laurence Daddi, Emanuele Cenarro, Javier Conselice, Christopher J. Guzmán, Rafael Gallego, Jesús |
description | We report on results from the analysis of a stellar mass-selected (log (M
*/M) ≥ 9.0) sample of 1644 galaxies at 0.65 < z < 1.1 with ultradeep (mAB < 26.5) optical medium-band (R ∼ 50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of SHARDS allows us to consistently measure the strength of the 4000 Å spectral break [D
n
(4000), an excellent age indicator for the stellar populations of quiescent galaxies] for all galaxies at z ∼ 0.9 down to log (M
*/M) ∼ 9. The D
n
(4000) index cannot be resolved from broad-band photometry, and measurements from optical spectroscopic surveys are typically limited to galaxies at least 10 times more massive. When combined with the rest-frame U − V colour, (U − V)
r
, D
n
(4000) provides a powerful diagnostic of the extinction affecting the stellar population that is relatively insensitive to degeneracies with age, metallicity or star formation history. We use this novel approach to estimate de-reddened colours and light-weighted stellar ages for individual sources. We explore the relationships linking stellar mass, (U − V)
r
, and D
n
(4000) for the sources in the sample, and compare them to those found in local galaxies. The main results are: (a) both D
n
(4000) and (U − V)
r
correlate with M
*. The dispersion in D
n
(4000) values at a given M
* increases with M
*, while the dispersion for (U − V)
r
decreases due to the higher average extinction prevalent in massive star-forming galaxies. (b) For massive galaxies, we find a smooth transition between the blue cloud and red sequence in the intrinsic U − V colour, in contrast with other recent results. (c) At a fixed stellar age, we find a positive correlation between extinction and stellar mass. (d) The fraction of sources with declining or halted star formation increases steeply with the stellar mass, from ∼5 per cent at log (M
*/M) = 9.0-9.5 to ∼80 per cent at log (M
*/M) > 11, in agreement with downsizing scenarios. |
doi_str_mv | 10.1093/mnras/stt1165 |
format | article |
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*/M) ≥ 9.0) sample of 1644 galaxies at 0.65 < z < 1.1 with ultradeep (mAB < 26.5) optical medium-band (R ∼ 50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of SHARDS allows us to consistently measure the strength of the 4000 Å spectral break [D
n
(4000), an excellent age indicator for the stellar populations of quiescent galaxies] for all galaxies at z ∼ 0.9 down to log (M
*/M) ∼ 9. The D
n
(4000) index cannot be resolved from broad-band photometry, and measurements from optical spectroscopic surveys are typically limited to galaxies at least 10 times more massive. When combined with the rest-frame U − V colour, (U − V)
r
, D
n
(4000) provides a powerful diagnostic of the extinction affecting the stellar population that is relatively insensitive to degeneracies with age, metallicity or star formation history. We use this novel approach to estimate de-reddened colours and light-weighted stellar ages for individual sources. We explore the relationships linking stellar mass, (U − V)
r
, and D
n
(4000) for the sources in the sample, and compare them to those found in local galaxies. The main results are: (a) both D
n
(4000) and (U − V)
r
correlate with M
*. The dispersion in D
n
(4000) values at a given M
* increases with M
*, while the dispersion for (U − V)
r
decreases due to the higher average extinction prevalent in massive star-forming galaxies. (b) For massive galaxies, we find a smooth transition between the blue cloud and red sequence in the intrinsic U − V colour, in contrast with other recent results. (c) At a fixed stellar age, we find a positive correlation between extinction and stellar mass. (d) The fraction of sources with declining or halted star formation increases steeply with the stellar mass, from ∼5 per cent at log (M
*/M) = 9.0-9.5 to ∼80 per cent at log (M
*/M) > 11, in agreement with downsizing scenarios.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stt1165</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Comparative analysis ; Correlation analysis ; Measurement ; Star & galaxy formation</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2013-09, Vol.434 (3), p.2136-2152</ispartof><rights>2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2013</rights><rights>Copyright Oxford University Press, UK Sep 21, 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c337t-ed40527c574fbcfc233f4e3f32a1c6d9855c253e867cc1b5e7f65f4e26b05cfd3</citedby><cites>FETCH-LOGICAL-c337t-ed40527c574fbcfc233f4e3f32a1c6d9855c253e867cc1b5e7f65f4e26b05cfd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stt1165$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Hernán-Caballero, Antonio</creatorcontrib><creatorcontrib>Alonso-Herrero, Almudena</creatorcontrib><creatorcontrib>Pérez-González, Pablo G.</creatorcontrib><creatorcontrib>Cardiel, Nicolás</creatorcontrib><creatorcontrib>Cava, Antonio</creatorcontrib><creatorcontrib>Ferreras, Ignacio</creatorcontrib><creatorcontrib>Barro, Guillermo</creatorcontrib><creatorcontrib>Tresse, Laurence</creatorcontrib><creatorcontrib>Daddi, Emanuele</creatorcontrib><creatorcontrib>Cenarro, Javier</creatorcontrib><creatorcontrib>Conselice, Christopher J.</creatorcontrib><creatorcontrib>Guzmán, Rafael</creatorcontrib><creatorcontrib>Gallego, Jesús</creatorcontrib><title>SHARDS: stellar populations and star formation histories of a mass-selected sample of 0.65 < z < 1.1 galaxies</title><title>Monthly notices of the Royal Astronomical Society</title><addtitle>Mon. Not. R. Astron. Soc</addtitle><description>We report on results from the analysis of a stellar mass-selected (log (M
*/M) ≥ 9.0) sample of 1644 galaxies at 0.65 < z < 1.1 with ultradeep (mAB < 26.5) optical medium-band (R ∼ 50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of SHARDS allows us to consistently measure the strength of the 4000 Å spectral break [D
n
(4000), an excellent age indicator for the stellar populations of quiescent galaxies] for all galaxies at z ∼ 0.9 down to log (M
*/M) ∼ 9. The D
n
(4000) index cannot be resolved from broad-band photometry, and measurements from optical spectroscopic surveys are typically limited to galaxies at least 10 times more massive. When combined with the rest-frame U − V colour, (U − V)
r
, D
n
(4000) provides a powerful diagnostic of the extinction affecting the stellar population that is relatively insensitive to degeneracies with age, metallicity or star formation history. We use this novel approach to estimate de-reddened colours and light-weighted stellar ages for individual sources. We explore the relationships linking stellar mass, (U − V)
r
, and D
n
(4000) for the sources in the sample, and compare them to those found in local galaxies. The main results are: (a) both D
n
(4000) and (U − V)
r
correlate with M
*. The dispersion in D
n
(4000) values at a given M
* increases with M
*, while the dispersion for (U − V)
r
decreases due to the higher average extinction prevalent in massive star-forming galaxies. (b) For massive galaxies, we find a smooth transition between the blue cloud and red sequence in the intrinsic U − V colour, in contrast with other recent results. (c) At a fixed stellar age, we find a positive correlation between extinction and stellar mass. (d) The fraction of sources with declining or halted star formation increases steeply with the stellar mass, from ∼5 per cent at log (M
*/M) = 9.0-9.5 to ∼80 per cent at log (M
*/M) > 11, in agreement with downsizing scenarios.</description><subject>Comparative analysis</subject><subject>Correlation analysis</subject><subject>Measurement</subject><subject>Star & galaxy formation</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouK4evQe8eOluPpq0FS_LrrrCguDquWTTRLu0Tc2koP56sx93D8PAM8_MwIvQNSUTSgo-bTuvYAohUCrFCRpRLkXCCilP0YgQLpI8o_QcXQBsCSEpZ3KE2vVy9rpY32EIpmmUx73rh0aF2nWAVVdFHqF1vt0z_FlDcL42gJ3FCrcKIAHTGB1MdFXbN2Y3IRMp8D3-jUUnFH-oRn3HpUt0ZlUD5urYx-j98eFtvkxWL0_P89kq0ZxnITFVSgTLtMhSu9FWM85tarjlTFEtqyIXQjPBTS4zrelGmMxKEQ0mN0RoW_Exujnc7b37GgyEcusG38WXJU1ZzmmRZzxaycHS3gF4Y8ve163yPyUl5S7Rcp9oeUw0-rcH3w39P-ofCGt4IA</recordid><startdate>20130921</startdate><enddate>20130921</enddate><creator>Hernán-Caballero, Antonio</creator><creator>Alonso-Herrero, Almudena</creator><creator>Pérez-González, Pablo G.</creator><creator>Cardiel, Nicolás</creator><creator>Cava, Antonio</creator><creator>Ferreras, Ignacio</creator><creator>Barro, Guillermo</creator><creator>Tresse, Laurence</creator><creator>Daddi, Emanuele</creator><creator>Cenarro, Javier</creator><creator>Conselice, Christopher J.</creator><creator>Guzmán, Rafael</creator><creator>Gallego, Jesús</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20130921</creationdate><title>SHARDS: stellar populations and star formation histories of a mass-selected sample of 0.65 < z < 1.1 galaxies</title><author>Hernán-Caballero, Antonio ; Alonso-Herrero, Almudena ; Pérez-González, Pablo G. ; Cardiel, Nicolás ; Cava, Antonio ; Ferreras, Ignacio ; Barro, Guillermo ; Tresse, Laurence ; Daddi, Emanuele ; Cenarro, Javier ; Conselice, Christopher J. ; Guzmán, Rafael ; Gallego, Jesús</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-ed40527c574fbcfc233f4e3f32a1c6d9855c253e867cc1b5e7f65f4e26b05cfd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Comparative analysis</topic><topic>Correlation analysis</topic><topic>Measurement</topic><topic>Star & galaxy formation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hernán-Caballero, Antonio</creatorcontrib><creatorcontrib>Alonso-Herrero, Almudena</creatorcontrib><creatorcontrib>Pérez-González, Pablo G.</creatorcontrib><creatorcontrib>Cardiel, Nicolás</creatorcontrib><creatorcontrib>Cava, Antonio</creatorcontrib><creatorcontrib>Ferreras, Ignacio</creatorcontrib><creatorcontrib>Barro, Guillermo</creatorcontrib><creatorcontrib>Tresse, Laurence</creatorcontrib><creatorcontrib>Daddi, Emanuele</creatorcontrib><creatorcontrib>Cenarro, Javier</creatorcontrib><creatorcontrib>Conselice, Christopher J.</creatorcontrib><creatorcontrib>Guzmán, Rafael</creatorcontrib><creatorcontrib>Gallego, Jesús</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Hernán-Caballero, Antonio</au><au>Alonso-Herrero, Almudena</au><au>Pérez-González, Pablo G.</au><au>Cardiel, Nicolás</au><au>Cava, Antonio</au><au>Ferreras, Ignacio</au><au>Barro, Guillermo</au><au>Tresse, Laurence</au><au>Daddi, Emanuele</au><au>Cenarro, Javier</au><au>Conselice, Christopher J.</au><au>Guzmán, Rafael</au><au>Gallego, Jesús</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SHARDS: stellar populations and star formation histories of a mass-selected sample of 0.65 < z < 1.1 galaxies</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><stitle>Mon. Not. R. Astron. Soc</stitle><date>2013-09-21</date><risdate>2013</risdate><volume>434</volume><issue>3</issue><spage>2136</spage><epage>2152</epage><pages>2136-2152</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>We report on results from the analysis of a stellar mass-selected (log (M
*/M) ≥ 9.0) sample of 1644 galaxies at 0.65 < z < 1.1 with ultradeep (mAB < 26.5) optical medium-band (R ∼ 50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of SHARDS allows us to consistently measure the strength of the 4000 Å spectral break [D
n
(4000), an excellent age indicator for the stellar populations of quiescent galaxies] for all galaxies at z ∼ 0.9 down to log (M
*/M) ∼ 9. The D
n
(4000) index cannot be resolved from broad-band photometry, and measurements from optical spectroscopic surveys are typically limited to galaxies at least 10 times more massive. When combined with the rest-frame U − V colour, (U − V)
r
, D
n
(4000) provides a powerful diagnostic of the extinction affecting the stellar population that is relatively insensitive to degeneracies with age, metallicity or star formation history. We use this novel approach to estimate de-reddened colours and light-weighted stellar ages for individual sources. We explore the relationships linking stellar mass, (U − V)
r
, and D
n
(4000) for the sources in the sample, and compare them to those found in local galaxies. The main results are: (a) both D
n
(4000) and (U − V)
r
correlate with M
*. The dispersion in D
n
(4000) values at a given M
* increases with M
*, while the dispersion for (U − V)
r
decreases due to the higher average extinction prevalent in massive star-forming galaxies. (b) For massive galaxies, we find a smooth transition between the blue cloud and red sequence in the intrinsic U − V colour, in contrast with other recent results. (c) At a fixed stellar age, we find a positive correlation between extinction and stellar mass. (d) The fraction of sources with declining or halted star formation increases steeply with the stellar mass, from ∼5 per cent at log (M
*/M) = 9.0-9.5 to ∼80 per cent at log (M
*/M) > 11, in agreement with downsizing scenarios.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stt1165</doi><tpages>17</tpages><oa>free_for_read</oa></addata></record> |
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language | eng |
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source | Open Access: Oxford University Press Open Journals |
subjects | Comparative analysis Correlation analysis Measurement Star & galaxy formation |
title | SHARDS: stellar populations and star formation histories of a mass-selected sample of 0.65 < z < 1.1 galaxies |
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