Globular Clusters in NGC 1275

Details Globular Clusters in NGC 1275 Globular Clusters in NGC 1275

1996-05-07

arxiv.org/abs/astro-ph/9605027v1

Astronomy and Astrophysics

Astrophysics

25 pages, latex, postscript figures, tarred, Unix compressed, postscript version of paper and figures available at http://ww

Scientific paper

10.1086/117956

We present the results of a deep photometric study of the outer halo of NGC 1275, the highly active cD galaxy at the center of the Perseus cluster. We find a modest excess of faint ($R > 22.5$) starlike objects in its halo, indicating a population of old-halo globular clusters. However, the total estimated cluster population corresponds to a specific frequency of $S_N = 4.4 \pm 1.2$, no larger than that of normal giant ellipticals and three times lower than that of other central cD galaxies such as M87. We discuss several ideas for the origin of this galaxy. Our results reinforce the view that high $S_N$ (ie: highly efficient globular cluster formation) is not associated with cooling flows, or with recent starburst or merger phenomena.

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