Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ap.....42...25b&link_type=abstract
Astrophysics, Volume 42, Issue 1, pp.25-32
Astronomy and Astrophysics
Astrophysics
Scientific paper
The distance modulus of the Virgo cluster has been reexamined based on the Tully-Fisher relation between fully corrected B. {/1 0 } values and 21 cm velocity width derived from RC3 catalogue for spiral galaxies of Sbc-Sdm types, belonging to the “low-velocity” Virgo subcluster, singled out according to the statistical method proposed by Anosova, and led to the value μ = 31.15 ± 0.57 mag. A strong dependence of the intrinsic scatter in the Tully-Fisher relation on the apparent axes ratio of galaxies has been found, with a value of 0.4 mag for strongly flattened, highly inclined galaxies and galaxies with small inclinations and a value of 0.72 mag for objects with intermediate values of axes ratio. The restriction to samples only with galaxies with photoelectric observations does not lead to a considerable change of amplitude of scatter and decreases the value the of distance modulus.
Borchkhadze Tengiz M.
Kogoshvili N. G.
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