Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chandra Observations of the Stellar Populations and Diffuse Gas in
  Nearby Galaxies   We present Chandra observations of two star-forming galaxies (M82 and the
Antennae) and three starburst/AGN composite galaxies (NGC1808, NGC6240,
NGC7331). In both star-forming galaxies we detect a large number of sources
with diverse properties. Some of them can be identified as X-ray binaries,
based on their variability and spectra. However, there is a significant number
of very soft and/or extended sources which could be supernova remnants.
  These observations confirm previous indications that there is a population of
sources with X-ray luminosities much higher than the Eddington limit for a
neutron star, suggesting that these objects are abundant in star-forming
galaxies. We find the the X-ray luminosity functions of the discrete sources in
these two galaxies are very similar. In the case of the composite galaxies we
find that the AGN does not dominate their X-ray emission. A significant
fraction of the emission from these objects is extended but there are also
X-ray sources associated with circumnuclear star-formation.

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The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
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The categories of this paper are: math
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: physics