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J/A+A/599/A71   209276 SDSS star-forming galaxies aperture-free  (Duarte+, 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 (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; Brinchmann et al., 2004MNRAS.351.1151B; Tremonti et al., 2004ApJ...613..898T; Salim et al., 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). 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; 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; Alam et al., 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
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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