On the relation between globular cluster specific frequency and galaxy type

Details On the relation between globular cluster specific frequency and galaxy type On the relation between globular cluster specific frequency and galaxy type

1998-06-05

arxiv.org/abs/astro-ph/9806094v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

The universality of the globular cluster luminosity function (GCLF) contrasts the variation seen in the specific frequency ($S_N$). The variation in $S_N$ has been shown to follow a linear relation with $L_X$ for brightest cluster galaxies (Blakeslee, J. 1997, Harris, W.E. et al. 1998). Further, the variation of $S_N$ with galactic radius within individual giant ellipticals is seen to be a constant fraction of the gas density (McLaughlin 1998). There are now a number of galaxies for which direct mass estimates based on the radial velocities of the globular clusters are available. By comparing the mass of galaxies determined in this way with the number of clusters within these galaxies we show that the fraction of mass which is converted into globular clusters is constant independent of galaxy type or environment. This implies that the process of globular cluster formation is not influenced by the host galaxy and supports the notion of the universal GCLF.

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