TY - JOUR
T1 - Global star formation rate density over 0.7 < z < 1.9
AU - Shim, Hyunjin
AU - Colbert, James
AU - Teplitz, Harry
AU - Henry, Alaina
AU - Malkan, Mattew
AU - McCarthy, Patrick
AU - Yan, Lin
PY - 2009/5/1
Y1 - 2009/5/1
N2 - 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 arcmin2 from which we select 80 galaxies with likely redshifted Hα emission lines. In several cases, a somewhat weaker [OIII] doublet emission is also detected. The Hα luminosity range of the emission-line galaxy sample is 4.4 × 10 41 < L(Hα) < 1.5 × 1043 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) × 1042 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.
AB - 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 arcmin2 from which we select 80 galaxies with likely redshifted Hα emission lines. In several cases, a somewhat weaker [OIII] doublet emission is also detected. The Hα luminosity range of the emission-line galaxy sample is 4.4 × 10 41 < L(Hα) < 1.5 × 1043 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) × 1042 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.
KW - Galaxies: evolution
KW - Galaxies: high-redshift
KW - Galaxies: luminosity function, mass function
KW - Galaxies: starburst
UR - http://www.scopus.com/inward/record.url?scp=70350608528&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/696/1/785
DO - 10.1088/0004-637X/696/1/785
M3 - Article
AN - SCOPUS:70350608528
SN - 0004-637X
VL - 696
SP - 785
EP - 796
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
ER -