Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.4208h&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #42.08; Bulletin of the American Astronomical Society, Vol. 34, p.1168
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a study of the Virgo cluster using a sample of galaxies from the Two Micron All-Sky Survey (2MASS) with complete photometry and redshift information, within the survey region, to a limiting magnitude m {K} = 12.0 mag. We use the infrared Tully-Fisher relation to determine distances to spiral galaxies in the cluster. Combined with distances obtained by surface brightness fluctuations (compiled from the literature), we establish distances to seven sub-clumps near the Virgo cluster, one of which (the W cloud) is probably background. Using these distances, we construct the K-band galaxy luminosity function of the cluster. We estimate the mass of the individual sub-clumps and the cluster as a whole, using the virial theorem. Using the luminosity function, we calculate the integral luminosity density in the core of the cluster. We compare the cluster luminosity function to field luminosity functions and calculate the luminosity over-density of the cluster versus the field. This work was supported in part by NSF grant AST-9731923 to the SAO Summer Intern program.
Hill Scott A.
Huchra John P.
Jarrett Thomas
Macri Lucas
Mader Jeff
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