Alignment statistics of clusters with their brightest members at bright and faint isophotes

Details Alignment statistics of clusters with their brightest members at bright and faint isophotes Alignment statistics of clusters with their brightest members at bright and faint isophotes

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...317..668s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 15, 1987, p. 668-671.

Astronomy and Astrophysics

Astrophysics

20

Astronomical Photometry, Brightness Distribution, Galactic Clusters, Isophotes, Star Formation, Stellar Envelopes, Surface Properties

Scientific paper

For a sample of 21 first-ranked cluster galaxies with published isophotal photometry and position angles of these isophotes the author finds that the major axes of both the bright and faint isophotal contours tend to be aligned within ≡30° of the major axis of the parent cluster. This supports the hypothesis that first-ranked galaxies are formed already aligned with their parent clusters rather than the hypothesis that only outer envelopes which accreted after formation are aligned with the cluster.

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