GALEX Observations of the Sloan Digital Sky Survey: A Comparison

Details GALEX Observations of the Sloan Digital Sky Survey: A Comparison GALEX Observations of the Sloan Digital Sky Survey: A Comparison

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...619l..23s&link_type=abstract

The Astrophysical Journal, Volume 619, Issue 1, pp. L23-L26.

Statistics

26

Galaxies: Statistics, Stars: Statistics, Surveys, Ultraviolet: Galaxies, Ultraviolet: General, Ultraviolet: Stars

Scientific paper

We have matched 358,046 objects in 143 deg2 of overlap between the Galaxy Evolution Explorer (GALEX) and the Sloan Digital Sky Survey (SDSS). This Letter provides matching statistics at Medium Imaging Survey and All-sky Imaging Survey depths for SDSS-classified stars and galaxies as well as spectroscopic star, galaxy, and QSO subsamples. Distributions of magnitudes, redshifts, and colors are provided. Near-ultraviolet (NUV)-based color-color diagrams reveal (1) the segregation of main-sequence, horizontal-branch, subdwarf, white dwarf, M dwarf, and M dwarf-white dwarf binary stellar populations, (2) a bimodal distribution of galaxies, and (3) the higher signal quality of the GALEX NUV compared to the SDSS u band.

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