Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.0604p&link_type=abstract
American Astronomical Society, 196th AAS Meeting, #06.04; Bulletin of the American Astronomical Society, Vol. 32, p.684
Astronomy and Astrophysics
Astronomy
Scientific paper
We investigate possible redshift-space artifacts in the Ursa Major Group near the Virgo Cluster, by using the Tully-Fisher relation between spiral galaxy luminosity and rotation rate as a distance indicator. We use I-band magnitudes from Tully, et al. (1996), H-band magnitudes from the 2MASS database, and HI linewidths compiled from the literature. The slopes of our best-fit lines and the dispersion about the lines are compared to the recent Cepheid variable calibration of the I- and H-band Tully-Fisher relation (Sakai, et al. 2000). We look for evidence that galaxies in an Ursa Major structure, which looks like a finger-of-god redshift-space artifact, may in fact be in close physical association.
Praton Elizabeth A.
Rothrock J. Jr. M.
Schneider Stephen E.
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