The redshifts of double galaxies

Details The redshifts of double galaxies The redshifts of double galaxies

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...142...21p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 142, no. 1, Jan. 1985, p. 21-30.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Catalogs, Galactic Clusters, Galactic Radiation, Orbital Velocity, Red Shift, Classifications, Data Sampling, Morphology, Velocity Distribution

Scientific paper

The reliability of the redshift classifications of 587 double galaxies is discussed, in order to identify orbital velocity differences. An environment classification for the full sample was performed on the basis of published data and POSS redshift inspections. Population percentages are given for the the samples of Karachentsev (1981), Turner (1976), and Peterson (1979). It is shown that the velocity difference distribution of isolated pairs in the samples was significantly different from the distributions derived for groups and clusters. Double galaxies with at least a Markarian component galaxy had lower orbital velocities, and smaller linear separations than the other types of double galaxies. The redshift difference excess associated with spiral components of mixed pairs were also studied, and the results are discussed in detail.

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