V and R-band Galaxy Luminosity Functions and Low Surface Brightness Galaxies in the Century Survey

Details V and R-band Galaxy Luminosity Functions and Low Surface Brightness Galaxies in the Century Survey V and R-band Galaxy Luminosity Functions and Low Surface Brightness Galaxies in the Century Survey

2001-05-11

arxiv.org/abs/astro-ph/0105186v1

Astron.J. 122 (2001) 714

Astronomy and Astrophysics

Astrophysics

20 pages, includes 20 figures, accepted for publication in the Astronomical Journal

Scientific paper

10.1086/321176

We use 64 square degrees of deep V and R CCD images to measure the local V and R band luminosity function of galaxies. The V_0<16.7 and R_0<16.2 redshift samples contain 1250 galaxies and are 98% complete. We apply k-corrections before the magnitude selection so that the completeness is to the same depth for all spectral types. The V and R faint end slopes are surprisingly identical: alpha = -1.07+-0.09. Representative Schechter function parameters for H_0=100 are: M^*_R = -20.88+-0.09, phi^*_R = 0.016+-0.003 Mpc^-3 and M^*_V = -20.23+-0.09, phi^*_V = 0.020+-0.003 Mpc^-3. The V and R local luminosity densities, j_R = (1.9+-0.6)x10^8 and j_V = (2.2+-0.7)x10^8 L_sun, are in essential agreement with the recent 2dF and SDSS determinations. All low surface brightness (LSB) galaxies fall in the large scale structure delineated by high surface brightness galaxies. The properties and surface number density of our LSB galaxies are consistent with the LSB galaxy catalog of O'Neil, Bothun & Cornell, suggesting that our samples are complete for LSB galaxies to the magnitude limits. We measure colors, surface brightnesses, and luminosities for our samples, and find strong correlations among these galaxy properties.

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