The environmental dependence of the infrared luminosity and stellar mass functions

Michael L. Balogh, Daniel Christlein, Ann I. Zabludoff, Dennis Zaritsky

Research output: Contribution to journalArticle

88 Scopus citations

Abstract

We investigate the dependence of the galaxy infrared luminosity function (LF) and the associated stellar mass function (SMF) on environment and spectral type using photometry from the Two Micron All Sky Survey and redshifts from the Las Campanas Redshift Survey for galaxies brighter than MJ 7< -19 + 5 log h. In the field environment, the LFs of galaxies with emission lines have much steeper faint-end slopes (αJ = -1.39) than those of galaxies without emission lines (αJ = -0.59). In the cluster environment, however, even the non-emission-line galaxies have a steep faint-end LF (αJ = -1.22). There is also a significant (95%) difference between the overall cluster and field LFs, ΔαJ = -0.34 and ΔM*J = -0.54. All these variations are more pronounced in the SMFs, which we compute by relating the strength of the 4000 Å break in the optical spectra to a stellar mass-to-light ratio.

Original languageEnglish (US)
Pages (from-to)117-125
Number of pages9
JournalAstrophysical Journal
Volume557
Issue number1 PART 1
DOIs
StatePublished - Aug 10 2001

Keywords

  • Galaxies: clusters: general
  • Galaxies: evolution
  • Galaxies: luminosity function, mass function
  • Infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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