Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Understanding Type II Supernovae   We present the results of a systematic analysis of a group of Type II plateau
supernovae that span a large range in luminosities, from faint objects like SN
1997D and 1999br to very luminous events like SN 1992am. The physical
properties of the supernovae appear to be related to the plateau luminosity or
the expansion velocity. The simultaneous analysis of the observed light curves,
line velocities and continuum temperatures leads us to robust estimates of the
physical parameters of the ejected envelope. We find strong correlations among
several parameters. The implications of these results regarding the nature of
the progenitor, the central remnant and the Ni yield are also addressed.

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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
1
The categories of this paper are: cs
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The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
32
The categories of this paper are: atom-ph