A study of the luminosity function for field galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrophysics, Functional Analysis, Functions (Mathematics), Galactic Radiation, Galaxies, Luminosity, Astronomical Catalogs, Hubble Diagram, Interstellar Radiation, Luminous Intensity

Scientific paper

Nine determinations of the luminosity function (LF) for field galaxies are analyzed and compared. Corrections for differences in Hubble constants, magnitude systems, galactic absorption functions, and definitions of the LF are necessary prior to comparison. Errors in previous comparisons are pointed out. After these corrections, eight of the nine determinations are in fairly good agreement. The discrepancy in the ninth appears to be mainly an incompleteness effect. The LF data suggest that there is little if any distinction between field galaxies and those in small groups.

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