The local space density of dwarf galaxies

Loveday, Jon (1997) The local space density of dwarf galaxies. Astrophysical Journal, 489 (1). pp. 29-36. ISSN 0004-637X

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We estimate the luminosity function of field galaxies over a range of 10 mag (-22<MBJ<-12 for H0 = 100 km s-1 Mpc-1) by counting the number of faint APM galaxies around Stromlo-APM redshift survey galaxies at known distance. The faint end of the luminosity function rises steeply at MBJ ≈ -15, implying that the space density of dwarf galaxies is at least 2 times larger than predicted by a Schechter function with flat faint-end slope. Such a high abundance of dwarf galaxies at low redshift can help explain the observed number counts and redshift distributions of faint galaxies without invoking exotic models for galaxy evolution.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Depositing User: Jonathan Loveday
Date Deposited: 06 Feb 2012 19:24
Last Modified: 02 Jul 2019 19:54

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