A SUBSTANTIAL POPULATION OF MASSIVE QUIESCENT GALAXIES AT z ∼ 4 FROM ZFOURGE
We report the likely identification of a substantial population of massive M ~ 10[sup 11] M galaxies at z ~ 4 with suppressed star formation rates (SFRs), selected on rest-frame optical to near-IR colors from the FourStar Galaxy Evolution Survey (ZFOURGE). The observed spectral energy distributions...
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| Veröffentlicht in: | Astrophysical journal. Letters 2014-03, Vol.783 (1), p.1-7 |
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| container_title | Astrophysical journal. Letters |
| container_volume | 783 |
| creator | Straatman, Caroline M S Labbe, Ivo Spitler, Lee R Allen, Rebecca Altieri, Bruno Brammer, Gabriel B Dickinson, Mark van Dokkum, Pieter Inami, Hanae Glazebrook, Karl |
| description | We report the likely identification of a substantial population of massive M ~ 10[sup 11] M galaxies at z ~ 4 with suppressed star formation rates (SFRs), selected on rest-frame optical to near-IR colors from the FourStar Galaxy Evolution Survey (ZFOURGE). The observed spectral energy distributions show pronounced breaks, sampled by a set of near-IR medium-bandwidth filters, resulting in tightly constrained photometric redshifts. Fitting stellar population models suggests large Balmer/4000A breaks, relatively old stellar populations, large stellar masses, and low SFRs, with a median specific SFR of 2.9 [+ or -]1.8 10[sup -11] yr[sup -1]. Ultradeep Herschel/PACS 100 mu m, 160 mu m and Spitzer/MIPS 24 mu m data reveal no dust-obscured SFR activity for 15/19(79%) galaxies. The study suggests that most of the star formation in the progenitors of quiescent z ~ 4 galaxies was obscured by dust. |
| doi_str_mv | 10.1088/2041-8205/783/1/L14 |
| format | Article |
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Letters</jtitle><date>2014-03-01</date><risdate>2014</risdate><volume>783</volume><issue>1</issue><spage>1</spage><epage>7</epage><pages>1-7</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We report the likely identification of a substantial population of massive M ~ 10[sup 11] M galaxies at z ~ 4 with suppressed star formation rates (SFRs), selected on rest-frame optical to near-IR colors from the FourStar Galaxy Evolution Survey (ZFOURGE). The observed spectral energy distributions show pronounced breaks, sampled by a set of near-IR medium-bandwidth filters, resulting in tightly constrained photometric redshifts. Fitting stellar population models suggests large Balmer/4000A breaks, relatively old stellar populations, large stellar masses, and low SFRs, with a median specific SFR of 2.9 [+ or -]1.8 10[sup -11] yr[sup -1]. Ultradeep Herschel/PACS 100 mu m, 160 mu m and Spitzer/MIPS 24 mu m data reveal no dust-obscured SFR activity for 15/19(79%) galaxies. 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| source | IOP Publishing Free Content; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; IOPscience extra; Alma/SFX Local Collection |
| subjects | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Breaking COLOR COSMIC DUST COSMOLOGY DENSITY DETECTION ENERGY SPECTRA FILTERS GALACTIC EVOLUTION GALAXIES MASS Photometry Progenitors (astrophysics) RED SHIFT Spectral energy distribution Star formation STARS Stellar mass Stellar populations ULTRAVIOLET RADIATION |
| title | A SUBSTANTIAL POPULATION OF MASSIVE QUIESCENT GALAXIES AT z ∼ 4 FROM ZFOURGE |
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