• DOI:10.1086/516636
• Corpus ID: 119085482

The GALEX Ultraviolet Atlas of Nearby Galaxies

@article{GildePaz2006TheGU,
  title={The GALEX Ultraviolet Atlas of Nearby Galaxies},
  author={Armando Gil de Paz and Samuel Boissier and Barry F. Madore and Mark Seibert and Young Hoon Joe and Alessandro Boselli and Ted K. Wyder and David A. Thilker and Luciana Bianchi and Soo-Chang Rey and Robert Michael Rich and Tom A. Barlow and Tim Conrow and Karl Forster and Peter G. Friedman and D. Christopher Martin and Patrick Morrissey and Susan Gale Neff and David Schiminovich and Todd A. Small and Jos{\'e} Donas and Timothy M. Heckman and Young-Wook Lee and Bruno Milliard and Alexander S. Szalay and Sukyoung K. Yi},
  journal={The Astrophysical Journal Supplement Series},
  year={2006},
  volume={173},
  pages={185 - 255}
}

• A. Gil de Paz, S. Boissier, +23 authors S. Yi
• Published 19 June 2006
• Physics
• The Astrophysical Journal Supplement Series

We present images, integrated photometry, and 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; λeff = 1516 Å) and near-ultraviolet (NUV; λeff = 2267 Å) bands. Our catalog of objects is derived primarily from the GALEX Nearby Galaxies Survey (NGS) supplemented by galaxies larger than 1′ 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 subtypes. 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, β) 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.