To be published in 2006 ApJS.
For a PDF version of the article, click
here.
astro-ph/0606440
1 The Observatories, Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101; agpaz, boissier, young@ociw.edu; AGdP's current address: Departamento de Astrofísica, Universidad Complutense de Madrid, Madrid 28040, Spain; SB's current address: Laboratoire d'Astrophysique de Marseille, BP 8, Traverse du Siphon, 13376 Marseille Cedex 12, France.
2 NASA/IPAC Extragalactic Database, California Institute of Technology, MS 100-22, Pasadena, CA 91125; barry@ipac.caltech.edu
3 California Institute of Technology, MC 405-47, 1200 East California Boulevard, Pasadena, CA 91125; mseibert, wyder, screy, tab, tim, krl, friedman, cmartin, patrick, ds, tas@srl.caltech.edu; SCR's current address: Department of Astronomy and Space Sciences, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea
4 Center for Space Astrophysics, Yonsei University, Seoul 120-749, Korea; ywlee@csa.yonsei.ac.kr, yi@astro.ox.ac.uk
5 Laboratoire d'Astrophysique de Marseille, BP 8, Traverse du Siphon, 13376 Marseille Cedex 12, France; alessandro.boselli, jose, bruno.milliard@oamp.fr
6 Center for Astrophysical Sciences, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218; dthilker, bianchi@pha.jhu.edu
7 Department of Physics and Astronomy, University of California, Los Angeles, CA 90095; rmr@astro.ucla.edu
8 Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771; neff@stars.gsfc.nasa.gov
9 Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218; heckman, szalay@pha.jhu.edu
Abstract.
We present images, integrated photometry, surface-brightness and color
profiles for a total of 1034 nearby galaxies recently observed by the
Galaxy Evolution Explorer (GALEX) satellite in its far-ultraviolet
(FUV;
eff = 1516
Å) and near-ultraviolet (NUV;
eff = 2267
Å) bands. Our catalog of objects is
derived primarily from the GALEX Nearby Galaxies Survey (NGS)
supplemented by galaxies larger than 1arcmin in diameter
serendipitously found in these fields and in other GALEX exposures of
similar of greater depth. The sample analyzed here adequately
describes the distribution and full range of properties (luminosity,
color, Star Formation Rate; SFR) of galaxies in the Local Universe.
From the surface brightness profiles obtained we have computed asymptotic magnitudes, colors, and luminosities, along with the concentration indices C31 and C42. We have also morphologically classified the UV surface brightness profiles according to their shape. This data set has been complemented with archival optical, near-infrared, and far-infrared fluxes and colors.
We find that the integrated (FUV- K) color provides robust
discrimination between elliptical and spiral/irregular galaxies and
also among spiral galaxies of different sub-types. Elliptical galaxies
with brighter K-band luminosities (i.e. more massive) are redder
in (NUV- K) color but bluer in (FUV-NUV) (a color sensitive to the
presence of a strong UV upturn) than less massive ellipticals. In the
case of the spiral/irregular galaxies our analysis shows the presence
of a relatively tight correlation between the (FUV-NUV) color (or,
equivalently, the slope of the UV spectrum,
) and the total
infrared-to-UV ratio. The correlation found between (FUV-NUV) color
and K-band luminosity (with lower luminosity objects being bluer
than more luminous ones) can be explained as due to an increase in the
dust content with galaxy luminosity.
The images in this Atlas along with the profiles and integrated properties are publicly available through a dedicated web page at /level5/GALEX_Atlas/
Keywords: galaxies: evolution - galaxies: fundamental parameters - galaxies: photometry - ultraviolet: galaxies - atlases
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