J/A+A/599/A71 209276 SDSS star-forming gal. aperture-free (Duarte Puertas+ 2017)
Aperture-free star formation rate of SDSS star-forming galaxies.
Duarte Puertas S., Vilchez J.M., Iglesias-Paramo J., Kehrig C.,
Perez-Montero E., Rosales-Ortega F.F.
<Astron. Astrophys., 599, A71 (2017)>
=2017A&A...599A..71D 2017A&A...599A..71D (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxy catalogs ; Extinction
Keywords: galaxies: general - galaxies: star formation - galaxies: formation -
galaxies: evolution
Abstract:
Large area surveys with a high number of galaxies observed have
undoubtedly marked a milestone in the understanding of several
properties of galaxies, such as star-formation history, morphology,
and metallicity. However, in many cases, these surveys provide fluxes
from fixed small apertures (e.g. fibre), which cover a scant fraction
of the galaxy, compelling us to use aperture corrections to study the
global properties of galaxies. In this work, we derive the current
total star formation rate (SFR) of Sloan Digital Sky Survey (SDSS)
star-forming galaxies, using an empirically based aperture correction
of the measured Hα flux for the first time, thus minimising the
uncertainties associated with reduced apertures. All the Hα
fluxes have been extinction-corrected using the Hα/Hβ ratio
free from aperture effects. The total SFR for ∼210000 SDSS
star-forming galaxies has been derived applying pure empirical
Hα and Hα/Hβ aperture corrections based on the Calar
Alto Legacy Integral Field Area (CALIFA) survey. We find that, on
average, the aperture-corrected SFR is ∼0.65dex higher than the SDSS
fibre-based SFR. The relation between the SFR and stellar mass for
SDSS star-forming galaxies (SFR-M*) has been obtained, together with
its dependence on extinction and Hα equivalent width. We compare
our results with those obtained in previous works and examine the
behaviour of the derived SFR in six redshift bins, over the redshift
range 0.005≤z≤0.22. The SFR-M* sequence derived here is in agreement
with selected observational studies based on integral field
spectroscopy of individual galaxies as well as with the predictions of
recent theoretical models of disc galaxies.
Description:
Our study is based on the MPA-JHU public catalogue (Kauffmann et al..
2003MNRAS.341...33K 2003MNRAS.341...33K; Brinchmann et al., 2004MNRAS.351.1151B 2004MNRAS.351.1151B; Tremonti
et al., 2004ApJ...613..898T 2004ApJ...613..898T; Salim et al., 2007ApJS..173..267S 2007ApJS..173..267S), which
gives spectroscopic data of the galaxies in the Sloan Digital Sky
Survey Data Release 7 (SDSS-DR7) (Abazajian et al.,
2009ApJS..182..543A 2009ApJS..182..543A). The SDSS spectroscopic primary sample of
galaxies is complete in Petrosian r magnitude in the range
14.5≤r≤17.7 (Strauss et al., 2002AJ....124.1810S 2002AJ....124.1810S; Brinchmann et al.
ArXiv e-prints [arXiv:astro-ph/0406220]). We added the photometric
data from the SDSS-DR12 (York et al., 2000AJ....120.1579Y 2000AJ....120.1579Y; Alam et
al., 2015ApJS..219...12A 2015ApJS..219...12A) to the MPA-JHU catalogue.
We selected a subset of 209276 star-forming galaxies.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 103 209276 Catalogue of 209276 SDSS star-forming galaxies
empirically corrected for aperture using the
empirical aperture corrections from
Iglesias-Paramo et al. (2016, Cat J/ApJ/826/71)
--------------------------------------------------------------------------------
See also:
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
J/ApJ/826/71 : Growth curves of CALIFA spiral galaxies (Iglesias-Paramo+, 2016)
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- specObjID SDSS-DR12 unique spectrum identification
21- 28 F8.4 deg RAdeg SDSS right ascension (J2000)
30- 37 F8.4 deg DEdeg SDSS declination (J2000)
39- 44 F6.4 --- z Spectroscopic redshift
46- 51 F6.4 arcsec petroR50r Radius containing 50% of Petrosian flux
in the r-band
54- 65 E12.6 mW/m2 Hacorr Total Hα flux corrected for aperture
effects and extinction
67- 73 F7.4 mag AHa Extinction in Hα
76- 87 E12.6 10-7W LHa Hα luminosity corrected for aperture
effects
89- 95 F7.4 [Msun/yr] logSFR Log of total star formation rate corrected
for aperture effects
97-103 F7.4 [1/Gyr] logsSFR Log of total specific star formation rate
corrected for aperture effects
--------------------------------------------------------------------------------
Acknowledgements:
Salvador Duarte Puertas, salvini(at)iaa.es
(End) Patricia Vannier [CDS] 08-Sep-2017