The GALEX/S4G Surface Brightness and Color Profiles Catalog. I. Surface Photometry and Color Gradients of Galaxies
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Final Published Version
Author
Bouquin, Alexandre Y. K.Gil de Paz, Armando
Muñoz-Mateos, Juan Carlos
Boissier, Samuel
Sheth, Kartik
Zaritsky, Dennis
Peletier, Reynier F.
Knapen, Johan H.
Gallego, Jesús
Affiliation
Univ Arizona, Steward ObservIssue Date
2018-01-25Keywords
catalogsgalaxies: photometry
galaxies: star formation
infrared: galaxies
ultraviolet: galaxies
Supporting material: machine-readable tables
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IOP PUBLISHING LTDCitation
The GALEX/S4G Surface Brightness and Color Profiles Catalog. I. Surface Photometry and Color Gradients of Galaxies 2018, 234 (2):18 The Astrophysical Journal Supplement SeriesRights
© 2018. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We present new spatially resolved surface photometry in the far-ultraviolet (FUV) and near-ultraviolet (NUV) from images obtained by the Galaxy Evolution Explorer (GALEX) and IRAC1 (3.6 mu m) photometry from the Spitzer Survey of Stellar Structure in Galaxies (S(4)G). We analyze the radial surface brightness profiles mu(FUV), mu(NUV), and mu[3.6], as well as the radial profiles of (FUV - NUV), (NUV -[3.6]), and (FUV -[3.6]) colors in 1931 nearby galaxies (z < 0.01). The analysis of the 3.6 mu m surface brightness profiles also allows us to separate the bulge and disk components in a quasi-automatic way and to compare their light and color distribution with those predicted by the chemo-spectrophotometric models for the evolution of galaxy disks of Boissier & Prantzos. The exponential disk component is best isolated by setting an inner radial cutoff and an upper surface brightness limit in stellar mass surface density. The best-fitting models to the measured scale length and central surface brightness values yield distributions of spin and circular velocity within a factor of two of those obtained via direct kinematic measurements. We find that at a surface brightness fainter than mu([3.6]) = 20.89 mag arcsec(-2), or below 3 x 10(8) M-circle dot kpc(-2) in stellar mass surface density, the average specific star formation rate (sSFR) for star-forming and quiescent galaxies remains relatively flat with radius. However, a large fraction of GALEX Green Valley galaxies show a radial decrease in sSFR. This behavior suggests that an outside-in damping mechanism, possibly related to environmental effects, could be testimony of an early evolution of galaxies from the blue sequence of star-forming galaxies toward the red sequence of quiescent galaxies.ISSN
1538-4365Version
Final published versionSponsors
People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme under REA [PITN-GA-2011-289313]; Spanish Ministry of Education, Culture and Sports [PR2015-00512]; Spanish Ministry of Economy and Competitiveness (MINECO) [AYA2013-41243-P, AYA2016-76219-P]Additional Links
http://stacks.iop.org/0067-0049/234/i=2/a=18?key=crossref.c221e5af64eb5cb3be167569ab26dd2cae974a485f413a2113503eed53cd6c53
10.3847/1538-4365/aaa384