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The Missing Intermediate Luminosity Galaxies in the Leo I Group
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Journal Article
The Missing Intermediate Luminosity Galaxies in the Leo I Group
2003
Overview
We present results from a large scale R-band survey of the nearby Leo I group to measure the luminosity function down to dwarf spheroidal luminosities and surface brightnesses. This program has utilized>7 square degrees of imaging with the Mosaic camera at the KPNO 0.9mand extensive, on-going spectroscopic follow-up. We estimate our completeness from simulations to be 90% at μ^sub R^(0) 24.5, M^sub R^ -11.Leo I is a nearby, low-density group for which a steep faint-end slope has been suggested (Ferguson and Sandage, 1991).We find the luminosity function to be more similar to that of the Local Group at the faint-end (flat).We also find an unusual gap in the luminosity function at intermediate luminosities, -19.5 < M^sub R^ < -16. This gap cannot be explained by pure Poisson fluctuations around a typical Schechter function, nor is it likely to result from photometric incompleteness.[PUBLICATION ABSTRACT]
Publisher
Springer Nature B.V
Subject
