Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Insights from a study of the Globular Cluster Systems of 60
  Early-Type Galaxies   We present the results of our detailed WFPC2-based photometric study of the
globular cluster systems (GCS) of over 60 elliptical and S0 galaxies.
Approximately 50\% of the GCSs of ellipticals, and at least 15-20\% of S0s
reveal bimodality in the color distribution. We trace the variation in GCS
properties with Hubble type and discuss the implications on the various models
of galaxy (and cluster system) formation. We also provide evidence that the
globular cluster luminosity function is an excellent distance indicator with an
accuracy comparable to the surface brightness fluctuation method.

27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat