Individual masses of paired galaxies

Details Individual masses of paired galaxies Individual masses of paired galaxies

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62..417k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 62, May-June 1985, p. 417-431) Soviet Astronomy (ISSN 0038-5301), vol. 29, May-June 1985, p. 243

Astronomy and Astrophysics

Astronomy

2

Galactic Rotation, Galactic Structure, Mass Ratios, Orbital Mechanics, Eccentric Orbits, Galactic Clusters, Mass To Light Ratios, Radial Velocity

Scientific paper

Individual mass estimates are tabulated for 227 galaxies listed in the author's catalog of isolated pairs. The masses are derived from rotation curves, the 21-cm profile width, or the stellar radial-velocity dispersion in the central part of each galaxy. Comparison of the estimated orbital mass against the combined individual masses in a pair indicates that most of the components' mass lies within their standard 25m/(1 arcsec) squared isophote. The hypothesis that binary galaxies are embedded in massive, dark halos is in conflict with the observational evidence. The best fit between the orbital and individual mass estimates is achieved if paired galaxies move in orbits with an average eccentricity of about 0.25.

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