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Unbiased Multi-Parametric Estimations of Distances and Peculiar Velocities of the Galaxies

Published online by Cambridge University Press:  26 July 2016

T.B. Georgiev
T.B. Georgiev*
Affiliation:
Rozhen National Astronomical Observatory, BG-4700 Smolyan, Bulgaria

Extract

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Accurate estimates of distances and peculiar velocities for galaxies may be derived with the help of multi-dimensional regression analysis using two or more distance indicators pk (corrected apparent sizes, luminosities, other distance-dependent quantities) and some calibrators q1 (velocity dispersions of the ellipticals or HI-line widths of the spirals, mean surface brightness, colours, other distance-independent quantities) together, cf. Georgiev (1992). Here an example is given for 349 spiral galaxies with axial ratio D/d > 1.4 from the sample of Fisher & Tully (1981). The p-values are the major axis and the blue magnitude and the q-values are the HI line width, type and axial ratio.

Type
Part Fourteen: Mapping the Large-Scale Structure
Information
Symposium - International Astronomical Union , Volume 161: Astronomy from Wide-Field Imaging , 1994 , pp. 715 - 717
Copyright
Copyright © Kluwer 1994 

References

Fisher, J.R. & Tully, R.B., 1981. Astrophys. J. Suppl., 47, 139.Google Scholar
Georgiev, L., 1991. Private communication.Google Scholar
Georgiev, Ts., 1992. Sov. Astron. Let. 18 (Pis'ma v Astron. Zh., 18, 739).Google Scholar