Galaxy counts at ultraviolet wavelengths (2000 A)

Details Galaxy counts at ultraviolet wavelengths (2000 A) Galaxy counts at ultraviolet wavelengths (2000 A)

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257...24m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 1, p. 24-30.

Astronomy and Astrophysics

Astronomy

58

Galactic Evolution, Ultraviolet Astronomy, Astronomical Photometry, Background Radiation, Balloon-Borne Instruments, Telescopes

Scientific paper

Four high galactic latitude fields imaged at 2000 A with a 40-cm balloon-borne telescope have been used to perform galaxy counts in the range of UV magnitudes 15.0-18.5. The UV galaxy counts are higher than those measured in the U Johnson band and similar to those in the B, at the same F(lambda). The detected galaxies present negative m(2000)-b colors, with an average of -1.5, which suggests a dominant contribution of the Sdm and later types. The differential galaxy log-counts show a steep, near euclidean slope. Galaxies brighter than m(2000) = 18.5 make a contribution of about 30 ph(/cm-squared/sAsr)-1 to the FUV extragalactic background light.

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