J/MNRAS/494/199 The synthetic Emission Line COSMOS catalogue (Saito+, 2020)
The synthetic Emission Line COSMOS catalogue:
Hα and [OII] galaxy luminosity functions and counts at 0.3<z<2.5.
Saito S., de la Torre S., Ilbert O., Dubois C., Yabe K., Coupon J.
<Mon. Not. R. Astron. Soc., 494, 199-217 (2020)>
=2020MNRAS.494..199S 2020MNRAS.494..199S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Redshifts ; Models ; Photometry ; Optical ; Infrared
Keywords: surveys - galaxies: luminosity function
Abstract:
Star-forming galaxies with strong nebular and collisional emission
lines are privileged target galaxies in forthcoming cosmological large
galaxy redshift surveys. We use the COSMOS2015 photometric catalogue
to model galaxy spectral energy distributions and emission-line
fluxes. We adopt an empirical but physically motivated model that uses
information from the best-fitting spectral energy distribution of
stellar continuum to each galaxy. The emission-line flux model is
calibrated and validated against direct flux measurements in subsets
of galaxies that have 3D-HST or zCOSMOS-Bright spectra. We take a
particular care in modelling dust attenuation such that our model can
explain both Hα and [OII] observed fluxes at different
redshifts. We find that a simple solution to this is to introduce a
redshift evolution in the dust attenuation fraction parameter,
f=Estar(B-V)/Egas(B-V), as f(z)=0.44+0.2z. From this catalogue, we
derive the Hα and [OII] luminosity functions up to redshifts of
about 2.5 after carefully accounting for emission line flux and
redshift errors. This allows us to make predictions for Hα and
[OII] galaxy number counts in next-generation cosmological redshift
surveys. Our modelled emission lines and spectra in the COSMOS2015
catalogue shall be useful to study the target selection for planned
next-generation galaxy redshift surveys and we make them publicly
available as 'EL-COSMOS' on the ASPIC data base.
Description:
Laigle et al. (2016ApJS..224...24L 2016ApJS..224...24L, Cat. J/ApJS/224/24) provide the
most updated photometric catalogue in the COSMOS field. 31 photometric
bands nearly uniformly cover a wide range of wavelength from near
ultraviolet (2000Å) to mid-infrared (105Å). The COSMOS2015
catalogue includes a homogeneous population of galaxies essentially
selected in near-infrared (Ks=<24.7 in ultra-deep field).
In this paper, we select 518404 objects over 1.38deg2 [corresponding
to AUVISTA&A!OPT&ACOSMOS in Table 7 of Laigle et al.
(2016ApJS..224...24L 2016ApJS..224...24L, Cat. J/ApJS/224/24)] that are classified as
'galaxies' in the catalogue. Note that, even though X-ray sources are
removed in this classification, active galactic nuclei (AGNs) can be
still included.
In order to calibrate our method, we make use of two data sets of EL
fluxes from the zCOSMOS-Bright (Lilly et al. 2007ApJS..172...70L 2007ApJS..172...70L, Cat.
J/ApJS/172/70) and the 3D-HST (Brammer et al. 2012ApJS..200...13B 2012ApJS..200...13B;
Momcheva et al. 2016ApJS..225...27M 2016ApJS..225...27M, Cat. J/ApJS/225/27) surveys. The
wavelength coverage of zCOSMOS and 3D-HST is 5500<λ<9600Å
and 11000<λ<17000Å, respectively.
We use an empirical but physically motivated approach to model the
galaxy EL fluxes in the COSMOS field, where deep multiband photometric
data sets are available. We perform a SED fitting to COSMOS2015
galaxies including a careful EL flux modelling based on the number of
photoionizing photons predicted by the stellar continuum template.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 206 518404 EL-COSMOS catalogue
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See also:
J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)
J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID Unique identifier from the COSMOS2015
catalogue
8- 21 F14.10 deg RAdeg Right ascension (J2000)
23- 34 F12.10 deg DEdeg Declination (J2000)
36- 41 F6.4 --- zphot Photometric redshift
43- 50 F8.5 [Msun] Mass Mass from the best fitting model
52- 64 F13.9 [Msun/yr] SFR ?=-99 Star Formation Rate from the best
fitting model
66- 72 F7.3 [yr-1] SSFR ?=-99 Specific Star Formation Rate from
the best fitting model
74- 80 F7.4 mag umag CFHT u band AB magnitude from the best
fitting model
82- 88 F7.4 mag gmag HSC g band AB magnitude from the best
fitting model
90- 96 F7.4 mag rmag HSC r band AB magnitude from the best
fitting model
98-104 F7.4 mag imag HSC i band AB magnitude from the best
fitting model
106-112 F7.4 mag zmag HSC z band AB magnitude from the best
fitting model
114-120 F7.4 mag ymag HSC y band AB magnitude from the best
fitting model
122-128 F7.4 mag Jmag VISTA J band AB magnitude from the best
fitting model
130-136 F7.4 mag Hmag VISTA H band AB magnitude from the best
fitting model
138-144 F7.4 mag Kmag VISTA K band AB magnitude from the best
fitting model
146-156 E11.5 mW/m2 F[OIII] OII (3728Å) flux from the best fitting
model
158-168 E11.5 mW/m2 FHb Hβ (4863Å) flux from the best
fitting model
170-180 E11.5 mW/m2 F[OIIIa] OIIIa (4959Å) flux from the best
fitting model
182-192 E11.5 mW/m2 F[OIIIb] OIIIb (5007Å) flux from the best
fitting model
194-204 E11.5 mW/m2 FHa Hα (6565Å) flux from the best
fitting model
206 I1 --- Zone [1/9] Zone in the field
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 16-May-2023