The Statistical Study on the Size Distribution of Disk Galaxies

Details The Statistical Study on the Size Distribution of Disk Galaxies The Statistical Study on the Size Distribution of Disk Galaxies

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pnaoc...5....1w&link_type=abstract

Astronomical Research and Technology. Publications of National Astronomical Observatories of China (ISSN 1672-7673), Vol. 5, No.

Astronomy and Astrophysics

Astronomy

Galaxies:Formation, Galaxies:Evolution, Galaxies:Fundamental Parameters

Scientific paper

The authors chose 40599 face-on disk galaxies from Data Release 4 of Sloan Digital Sky Survey and statistically investigated their sizes. It is shown that the size distribution of disk galaxies at the given absolute magnitude is well described by a log-normal function for late-type galaxies. There is a tight relation between the size of galaxies and the absolute magnitude - that is: the bigger - the brighter. The authors also compared their results with Shen et al. (2003) in the same magnitude bin. The authors' results show that the half-light radii in r-band is little higher than theirs, because the authors' samples are only for face-on late-type galaxies while theirs included all late-type galaxies.

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