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J/ApJ/677/169       Hα galaxies at z=0.84                  (Villar+, 2008)

The Hα-based star formation rate density of the universe at z=0.84. Villar V., Gallego J., Perez-Gonzalez P.G., Pascual S., Noeske K., Koo D.C., Barro G., Zamorano J. <Astrophys. J., 677, 169-185 (2008)> =2008ApJ...677..169V
ADC_Keywords: Equivalent widths ; Extinction ; Photometry, infrared ; Galaxies, IR Keywords: galaxies: evolution - galaxies: luminosity function, mass function - galaxies: starburst Abstract: We present the results of an Hα near-infrared narrowband survey searching for star-forming galaxies at redshift z=0.84. This work is an extension of our previous narrowband studies in the optical at lower redshifts. After removal of stars and redshift interlopers (using spectroscopic and photometric redshifts), we build a complete sample of 165 Hα emitters in the extended Groth strip and GOODS-N fields with L(Hα)>1041ergs/s. We compute the Hα luminosity function at z=0.84 after corrections for [NII] flux contamination, extinction, systematic errors, and incompleteness. Our sources present an average dust extinction of A(Hα)=1.5mag. Adopting Hα as a surrogate for the instantaneous SFR, we measure an extinction-corrected SFR density of 0.17+0.03-0.03M/yr/Mpc3. Combining this result to our prior measurements at z=0.02, 0.24, and 0.40, we derive an Hα-based evolution of the SFR density proportional to (1+z)β with β=3.8±0.5. This evolution is consistent with that derived by other authors using different SFR tracers. Description: The survey was carried out with the NIR camera OMEGA-2000 on the 3.5m telescope at the Calar Alto Observatory (Almeria, Spain) with the J and narrowband filters. Three different 15'x15' pointings were obtained, two in the extended Groth strip (EGS) and another one in the GOODS-North (GOODS-N) field, in 2005 April and 2006 May. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 68 157 Observed sample
See also: J/ApJS/95/387 : Universidad Complutense de Madrid list 1 (Zamorano+ 1994) J/ApJS/105/343 : Universidad Complutense de Madrid list 2 (Zamorano+ 1996) J/A+A/379/798 : ELAIS Hα emitting galaxies (Pascual+, 2001) J/ApJS/177/431 : Mid-IR sources in EGS (Barmby+, 2008) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Name Source identification (<[VGP2008] aN-NNNN> in Simbad) 9- 17 F9.5 deg RAdeg Right ascension in decimal degrees (J2000) 19- 26 F8.5 deg DEdeg Declination in decimal degrees (J2000) 28- 32 F5.2 mag Jmag J-band magnitude (Vega) 34- 37 F4.2 mag e_Jmag Jmag uncertainty 39- 42 F4.1 10-20W/m2 fHalpha Hα line flux in 10-17ergs/s/cm2 44- 47 F4.1 10-20W/m2 e_fHalpha fHalpha uncertainty 49- 52 I4 0.1nm EWHa Hα rest-frame equivalent width 54- 57 F4.2 mag AHa Hα extinction 59- 62 F4.1 solMass/yr SFRobs Star Formation Rate observed 64- 68 F5.1 solMass/yr SFRcor Star Formation Rate corrected for extinction
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 15-Sep-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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