J/ApJS/175/128 Hα emitting galaxies in COSMOS-2 field (Shioya+, 2008)
The Hα luminosity function and star formation rate at z∼0.24 in
the COSMOS 2 square degree field.
Shioya Y., Taniguchi Y., Sasaki S.S., Nagao T., Murayama T.,
Takahashi M.I., Ajiki M., Ideue Y., Mihara S., Nakajima A., Scoville N.Z.,
Mobasher B., Aussel H., Giavalisco M., Guzzo L., Hasinger G., Impey C.,
Le Fevre O., Lilly S., Renzini A., Rich M., Sanders D.B., Schinnerer E.,
Shopbell P., Leauthaud A., Kneib J.-P., Rhodes J., Massey R.
<Astrophys. J. Suppl. Ser., 175, 128-137 (2008)>
=2008ApJS..175..128S 2008ApJS..175..128S
ADC_Keywords: Galaxies, optical ; Photometry, SDSS ; Equivalent widths
Keywords: galaxies: distances and redshifts - galaxies: evolution -
galaxies: luminosity function, mass function
Abstract:
To derive a new Hα luminosity function and to understand the
clustering properties of star-forming galaxies at z∼0.24, we have made
a narrowband imaging survey for Hα-emitting galaxies in the
Hubble Space Telescope (HST) COSMOS 2 square degree field. We used the
narrowband filter NB816 (λc=8150Å, Δλ=120Å)
and sampled Hα emitters with EWobs(Hα+[NII])>12Å in a
redshift range between z=0.233 and 0.251 corresponding to a depth of
70Mpc. We obtained 980 Hα-emitting galaxies in a sky area of
5540arcmin2, corresponding to a survey volume of 3.1x104Mpc3.
Description:
In this analysis, we use the COSMOS official photometric redshift
catalog (Capak et al., 2007, Cat. II/284 and Mobasher et al.,
2007ApJS..172..117M 2007ApJS..172..117M). Details of the Subaru Suprime-Cam observations
are given in Taniguchi et al. (2007ApJS..172....9T 2007ApJS..172....9T).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 980 A list of Hα emitter candidates
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See also:
II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)
J/ApJS/172/523 : COSMOS field Lyα emitters at z∼5.7 (Murayama+, 2007)
J/ApJS/172/456 : [OII] emitting galaxies in COSMOS + SDF fields
(Takahashi+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [STS2008] Running identification number (NNN)
5- 11 I7 --- COSMOS Identification number (NNNNNNN)
13- 21 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
23- 30 F8.6 deg DEdeg Declination in decimal degrees (J2000)
32- 36 F5.2 mag imag i'-band AB magnitude
38- 42 F5.2 mag zmag z'-band AB magnitude
44- 48 F5.2 mag NB816 NB816 band AB magnitude (λ=815±6nm)
50- 54 F5.2 mag izmag "iz continuum" AB magnitude (1)
56- 60 F5.2 mag iz-NB (iz-NB816) color index
62- 67 F6.2 [mW/m2] logFL Log of sum of the line flux
69- 74 F6.2 [mW/m2] LogFc Log of corrected sum of line flux
76- 80 F5.2 [10-7W] LogLa Log of Hα luminosity assuming 1213Mpc
82- 85 I4 0.1nm EW Hα equivalent width
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Note (1): is defined as the flux combination: f(iz) = 0.57f(i')+0.43f(z')
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Jun-2009