A Unique Mass Function from Galaxies to Clusters ?

Details A Unique Mass Function from Galaxies to Clusters ? A Unique Mass Function from Galaxies to Clusters ?

1993-08-11

arxiv.org/abs/astro-ph/9308015v1

Astronomy and Astrophysics

Astrophysics

9 pages (2 figures not included, available upon request), LATEX, SISSA Ref. 132/93/A

Scientific paper

We present an observational mass function ranging from galaxies to massive galaxy clusters, derived from direct dynamical mass estimates. Our mass function shows, in the low-mass range of galaxies and groups, a behaviour in agreement with that of standard CDM (n=-2), while in the high-mass range (clusters) our mass function is shallower (and thus contains more power) than standard CDM; it also results shallower than the recent mass function by Bahcall & Cen (1993, ApJ 407, L49).

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