Astrophys. J., Suppl. Ser., 244, 24-24 (2019/October-0)
A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX atlas of local galaxies.
LEROY A.K., SANDSTROM K.M., LANG D., LEWIS A., SALIM S., BEHRENS E.A., CHASTENET J., CHIANG I.-D., GALLAGHER M.J., KESSLER S. and UTOMO D.
Abstract (from CDS):
We present an atlas of ultraviolet and infrared images of ∼15,750 local (d <= 50 Mpc) galaxies, as observed by NASA's Wide-field Infrared Survey Explorer (WISE) and Galaxy Evolution Explorer (GALEX) missions. These maps have matched resolution (FWHM 7.''5 and 15''), matched astrometry, and a common procedure for background removal. We demonstrate that they agree well with resolved intensity measurements and integrated photometry from previous surveys. This atlas represents the first part of a program (the z = 0 Multiwavelength Galaxy Synthesis) to create a large, uniform database of resolved measurements of gas and dust in nearby galaxies. The images and associated catalogs will be publicly available at the NASA/IPAC Infrared Science Archive. This atlas allows us estimate local and integrated star formation rates (SFRs) and stellar masses (M*) across the local galaxy population in a uniform way. In the appendix, we use the population synthesis fits of Salim et al. to calibrate integrated M* and SFR estimators based on GALEX and WISE. Because they leverage a Sloan Digital Sky Survey (SDSS)-based training set of >100,000 galaxies, these calibrations have high precision and allow us to rigorously compare local galaxies to SDSS results. We provide these SFR and M* estimates for all galaxies in our sample and show that our results yield a "main sequence" of star-forming galaxies comparable to previous work. We also show the distribution of intensities from resolved galaxies in NUV-to-WISE1 versus WISE1-to-WISE3 space, which captures much of the key physics accessed by these bands.
© 2019. The American Astronomical Society. All rights reserved.
galaxies: general - galaxies: ISM - galaxies: spiral - galaxies: star formation - infrared: galaxies - ultraviolet: galaxies
VizieR on-line data:
<Available at CDS (J/ApJS/244/24): table4.dat table5.dat>
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