The luminosity function around isolated spiral galaxies

Details The luminosity function around isolated spiral galaxies The luminosity function around isolated spiral galaxies

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.295...99m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 295, p. 99

Astronomy and Astrophysics

Astronomy

12

Spiral Galaxies, Luminosity, Statistical Analysis, Red Shift, Galactic Structure, Galactic Nuclei, Dwarf Galaxies

Scientific paper

We determine the companion galaxy luminosity function (LF) for regions around isolated spiral galaxies. If we assume that any excess in the galaxy number counts in the vicinity of a spiral galaxy is due to galaxies at the same distance, then a system LF can be determined from the variation of excess numbers with apparent magnitude. By studying the excess over many field 'center' galaxies, a good statistical accuracy can be obtained for the companion galaxy LF. Since redshift information is not required for the faint galaxies, it is possible to sample further down the LF as compared with redshift surveys. For 23 primary galaxies of known redshift, we find a dwarf satellite Schechter LF with a characteristic magnitude of -19 and a faint-end slope of -1.7, down to Mv = -14 (H0 = 50 km/s Mpc).

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