Mathematics – Logic
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..487d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 15, 1986, p. 487-492.
Mathematics
Logic
14
Andromeda Galaxy, Hubble Constant, Spiral Galaxies, Virgo Galactic Cluster, Brightness Distribution, Cosmology, Distance, Hydrogen Ions, Line Spectra
Scientific paper
The method of "sosie" (or look-alike) is applied to the Virgo cluster S cloud and to the Hercules supercluster in which spirals closely matching M31 in all their observable distance-independent parameters have been found. Three galaxies in the Virgo S cloud and two in the Hercules supercluster are "sosies" of M31. If the M31 modulus is μ0 = 24.07±0.16, the resulting distance moduli are >μ0< = 30.8±0.3 for the Virgo S cloud and >μ0< = 35.25±0.3 for the Hercules supercluster. The distance, 112±17 Mpc, and the mean redshift of the Hercules supercluster in the cosmic background reference frame, 11,078±108 km s-1, give a Hubble ratio H* = 99±15 km s-1Mpc-1. The Hubble constant may differ by a few percent depending on cosmological model.
Corwin Harold G. Jr.
de Vaucouleurs Gerard
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