Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A spectroscopically normal type Ic supernova from a very massive
  progenitor   We present observations of the Type Ic supernova (SN Ic) 2011bm spanning a
period of about one year. The data establish that SN 2011bm is a
spectroscopically normal SN Ic with moderately low ejecta velocities and with a
very slow spectroscopic and photometric evolution (more than twice as slow as
SN 1998bw). The Pan-STARRS1 retrospective detection shows that the rise time
from explosion to peak was 40 days in the R band. Through an analysis of the
light curve and the spectral sequence, we estimate a kinetic energy of 7-17 foe
and a total ejected mass of 7-17 Mo, 5-10 Mo of which is oxygen and 0.6-0.7 Mo
is 56Ni. The physical parameters obtained for SN 2011bm suggest that its
progenitor was a massive star of initial mass 30-50 Mo. The profile of the
forbidden oxygen lines in the nebular spectra show no evidence of a bi-polar
geometry in the ejected material.

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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: eess