J/ApJ/696/785 Global SFR density over 0.7<z<1.9 (Shim+, 2009)
Global star formation rate density over 0.7<z<1.9.
Shim H., Colbert J., Teplitz H., Henry A., Malkan M., McCarthy P., Yan L.
<Astrophys. J., 696, 785-796 (2009)>
=2009ApJ...696..785S 2009ApJ...696..785S
ADC_Keywords: Galaxies, spectra ; Redshifts ; Photometry, HST ; Infrared sources
Keywords: galaxies: evolution - galaxies: high-redshift - galaxies: luminosity
function, mass function - galaxies: starburst
Abstract:
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
∼104arcmin2 from which we select 80 galaxies with likely redshifted
Hα emission lines. In several cases, a somewhat weaker [OIII]
doublet emission is also detected.
Description:
All of the data presented in this study have been obtained using
camera 3 of NICMOS onboard HST, taken in the pure parallel mode with
the G141 grism and the broadband F110W/F160W filters, between 2003
October and 2004 July (Cycle 12), 2004 July and 2005 January (Cycle
13).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 87 80 Emission-line objects from the NICMOS grism survey
--------------------------------------------------------------------------------
See also:
J/ApJ/677/169 : Hα galaxies at z=0.84 (Villar+, 2008)
J/ApJS/175/128 : Hα emitting galaxies in COSMOS-2 field (Shioya+, 2008)
J/AJ/127/2002 : Star Formation Rate of NFGS galaxies (Kewley+, 2004)
J/ApJS/146/209 : STIS emission-line galaxies observations (Teplitz+, 2003)
J/ApJ/549/820 : Hα flux of ACCG 114 galaxies (Couch+, 2001)
J/A+A/379/798 : ELAIS Hα emitting galaxies (Pascual+, 2001)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 20 A20 --- [SCT2009] Object name (1)
22 A1 --- f_[SCT2009] [e] Near-edge objects (2)
24- 25 I2 h RAh Hour of right ascension (J2000)
27- 28 I2 min RAm Minute of right ascension (J2000)
30- 34 F5.2 s RAs Second of right ascension (J2000)
36 A1 --- DE- Declination sign (J2000)
37- 38 I2 deg DEd Degree of declination (J2000)
40- 41 I2 arcmin DEm Arcminute of declination (J2000)
43- 46 F4.1 arcsec DEs Arcsecond of declination (J2000)
48- 52 F5.3 --- z Spectroscopic redshift (3)
54- 59 F6.3 10-19W/m2 FHa Hα emission line flux (4)
61- 63 I3 0.1nm Wave Observed wavelength
65- 69 F5.2 mag F110W ? HST/NICMOS F110W AB magnitude (J-band) (5)
71- 75 F5.2 mag F160W ? HST/NICMOS F160W AB magnitude (H-band) (5)
77- 81 F5.2 [10-7W] logLHa Log of Hα luminosity (6)
83- 87 F5.1 Msun/yr SFR Star formation rate (6)
--------------------------------------------------------------------------------
Note (1): We assign the suffix a, b, or c to identify different objects
in one field.
Note (2): 'e' indicates objects that do not have either F110W/F160W
photometry are objects lying near the image edge. Due to the
locations, we could not find these objects in the direct image despite
of clear emission lines (not thought to be zero order) for these
galaxies. All galaxies without F110W photometry do not have the
corresponding F110W images, i.e., there is no F110W-dropouts or
galaxies with very red (F110W-F160W) colors.
Note (3): In general there is a systematic redshift determination error of
Δz∼0.03. Also, there are a few cases where the emission-line object
lies near the edge of the image. In these cases, the counterpart of
the object is not found in the associated direct image, which causes a
large uncertainty in wavelength calibration up to ∼0.1um. The redshift
uncertainty for an object lying at the image edge is Δz∼0.15.
Note (4): Since the [NII] and Hα lines are not resolved in the
resolution of NICMOS grism, FHa represents f(Hα+[NII]).
Expressed in 10-16erg/cm2/s.
Note (5): F110W/F160W magnitudes are in AB magnitudes, MAG_AUTO from SExtractor
(total magnitudes of the galaxies). The conversion between AB and Vega
magnitudes are F110WVega=F110WAB-0.73; F160WVega=F160WAB-1.31
(derived using NICMOS zeropoints in Vega magnitude system at
http://www.stsci.edu/hst/nicmos/performance/photometry/postncs_keywords.html).
Note (6): Hα luminosity and the derived star formation rate are corrected
for possible [NII] contamination in the measured Hα line flux:
f(Hα)=0.71*f(Hα+[NII]).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 06-May-2011