Statistics – Computation
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303...19d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 303, April 1, 1986, p. 19-24.
Statistics
Computation
30
Astrometry, Computational Astrophysics, Distance, Galactic Structure, Hubble Constant, Solar Rotation, Stellar Motions, Cosmology, Error Analysis, Least Squares Method, Red Shift, Scale (Ratio), Star Distribution, Stellar Magnitude
Scientific paper
The redshifts of 140 galaxies having radial velocities V < 4000 km s-1 and distances 2 ≤ Δ ≤ 28 Mpc, derived in Paper I by the method of "sosies", are analyzed to evaluate the solar motion and the Hubble constant. Solutions are made by Jefferys's generalized least-squares technique which allows for errors in both variables. The data are divided into distance intervals, with mean distances >Δ< = 8.1 and 18.8 Mpc, to test for the possible presence of a Malmquist bias in the solutions. None is indicated. The mean Hubble ratio is >H*< = 115±5 (internal m.e.) in the first distance interval, >H*< = 105±4 in the second, and >H*< = 109±4 for the total sample. Including the mean error of the zero point of the distance modulus scale defined by 14 nearby galaxies, the external mean error is ≡10%.
de Vaucouleurs Gerard
Peters William L.
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