The average ellipticity of groups of galaxies

Details The average ellipticity of groups of galaxies The average ellipticity of groups of galaxies

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233...21r&link_type=abstract

Astrophysical Journal, Part 1, vol. 233, Oct. 1, 1979, p. 21, 22

Astronomy and Astrophysics

Astrophysics

21

Elliptical Galaxies, Galactic Clusters, Galactic Structure, Average, Ellipticity, Oblate Spheroids, Ratios

Scientific paper

A technique is presented for deriving the average ellipticity of a large sample of groups of galaxies. This technique is applied to two sets of real groups having a homogeneous surface-density distribution over a large range of radii. The observed average ellipticity of the groups examined is found to be the same, within uncertainties, as that for elliptical galaxies and first-brightest cluster members. It is concluded that the actual ellipticities of elliptical galaxies and groups of galaxies might be determined by similar astrophysical (perhaps cosmogonical) processes.

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