2001•arXiv (Cornell University)Open access

Dwarf Galaxies in the Leo I Group: the Group Luminosity Function beyond the Local Group

K. Flint, Michael Bolte, C. Mendes de Oliveira

Abstract

We present first results of a survey of the Leo I group at 10 Mpc for M_R < -10 dwarf galaxies. This is part of a larger program to measure the faint end of the galaxy luminosity function in nearby poor groups. Our method is optimized to find Local-Group-like dwarfs down to dwarf spheroidal surface brightnesses, but we also find very large LSB dwarfs in Leo I with no Local Group counterpart. A preliminary measurement of the luminosity function yields a slope consistent with that measured in the Local Group.

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Key concepts: Local Group, Luminosity function, Astrophysics, Physics, Dwarf galaxy, Dwarf spheroidal galaxy, Galaxy, Group (periodic table)