ar X iv : a st ro - p h / 98 06 09 4 v 1 5 J un 1 99 8 On the relation between globular cluster specific frequency and galaxy type

ar X iv : a st ro - p h / 98 02 06 9 v 1 5 F eb 1 99 8 1 Beppo - SAX Observations of Galaxy Clusters

The high spatial resolution of the MECS experiment on board Beppo-SAX has encouraged a few scientists, including the author, to perform observations of galaxy clusters. Results from the analysis of the first few observed objects are encouraging. After having reviewed the Beppo-SAX observing program for galaxy clusters and referenced contributions to these proceedings by other authors on the sam...

ar X iv : a st ro - p h / 99 11 15 7 v 1 1 0 N ov 1 99 9 The Specific Frequency of Globular Clusters in Galaxies .

Variations in the number of globular clusters per unit galaxy luminosity, which is the specific frequency, and the mass of globular clusters per unit total available mass, are reviewed. Correlations with galaxy luminosity and morphology, and with the properties of the associated galactic clusters are discussed, as are the color distributions of globular cluster populations. Several models for t...

ar X iv : a st ro - p h / 98 06 05 4 v 1 3 J un 1 99 8 2 . 5 – 11 . 6 μ spectrophotometry and imaging of the CfA sample

We present low resolution spectrophotometric and imaging ISO observations of a sample of 54 AGN's over the 2.5–11 µ range. The observations generally support unification schemes and set new constraints on models of the molecular torus.

ar X iv : a st ro - p h / 95 06 06 0 v 1 8 J un 1 99 5 The Physics of Core - Collapse Supernova Explosions a

ar X iv : a st ro - p h / 98 02 08 8 v 1 7 F eb 1 99 8 to appear in the AJ The Distance to the M 31 Globular Cluster System

The distance to the centroid of the M31 globular cluster system is determined by fitting theoretical isochrones to the observed red-giant branches of fourteen globular clusters in M31. The mean true distance modulus of the M31 globular clusters is found to be µ 0 = 24.47 ± 0.07 mag. This is consistent with distance moduli for M31 that have been obtained using other distance indicators.