Shim, Hyunjin and Colbert, James and Teplitz, Harry and Henry, Alaina and Malkan, Mattew and McCarthy, Patrick and Yan, Lin (2009) Global Star Formation Rate Density over 0.7 < z < 1.9. Astrophysical Journal, 696 (1). pp. 785-796. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20090828-100223529
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We determine the global star formation rate (SFR) density at 0.7 < z < 1.9 using emission-line-selected galaxies identified in Hubble Space Telescope-Near Infrared Camera and Multi-Object Spectrograph (HST-NICMOS) grism spectroscopy observations. Observing in a pure parallel mode throughout HST Cycles 12 and 13, our survey covers ~104 arcmin^2 from which we select 80 galaxies with likely redshifted Hα emission lines. In several cases, a somewhat weaker [O III] doublet emission is also detected. The Hα luminosity range of the emission-line galaxy sample is 4.4 × 10^(41) < L(Hα) < 1.5 × 10^(43) erg s^(–1). In this range, the luminosity function is well described by a Schechter function with φ* = (4.24 ± 3.55) × 10^(–3) Mpc^(–3), L* = (2.88 ± 1.58) × 10^(42) erg s^(–1), and α = –1.39 ± 0.43. We derive a volume-averaged SFR density of 0.138 ± 0.058 M⊙ yr^(–1) Mpc^(–3) at z = 1.4 without an extinction correction. Subdividing the redshift range, we find SFR densities of 0.088 ± 0.056 M⊙ yr^(–1) Mpc^(–3) at z = 1.1 and 0.265 ± 0.174 M⊙ yr^(–1) Mpc^(–3) at z = 1.6. The overall star formation rate density is consistent with previous studies using Hα when the same average extinction correction is applied, confirming that the cosmic peak of star formation occurs at z > 1.5.
|Additional Information:||© 2009 The American Astronomical Society. Received 2008 September 13; accepted 2009 February 3; published 2009 April 20. We would like to thank the anonymous referee for valuable comments. This work was supported by the Spitzer Visiting Graduate Student Fellowship program. H. Shim was supported in part by the Korea Science and Engineering Foundation (KOSEF) grant No. 2009-0063616, funded by the Korea government (MEST).|
|Subject Keywords:||galaxies: evolution; galaxies: high-redshift; galaxies: luminosity function, mass function; galaxies: starburst|
|Official Citation:||Global Star Formation Rate Density over 0.7 < z < 1.9 Hyunjin Shim, James Colbert, Harry Teplitz, Alaina Henry, Mattew Malkan, Patrick McCarthy, and Lin Yan 2009 ApJ 696 785-796 doi: 10.1088/0004-637X/696/1/785.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||28 Aug 2009 23:07|
|Last Modified:||26 Dec 2012 11:16|
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