Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hydrogen-Poor Circumstellar Shells from Pulsational Pair-Instability
  Supernovae with Rapidly Rotating Progenitors   In certain mass ranges, massive stars can undergo a violent pulsation
triggered by the electron/positron pair instability that ejects matter, but
does not totally disrupt the star. After one or more of these pulsations, such
stars are expected to undergo core-collapse to trigger a supernova explosion.
The mass range susceptible to this pulsational phenomena may be as low as 50-70
Msun if the progenitor is of very low metallicity and rotating sufficiently
rapidly to undergo nearly homogeneous evolution. The mass, dynamics, and
composition of the matter ejected in the pulsation are important aspects to
determine the subsequent observational characteristics of the explosion. We
examine the dynamics of a sample of stellar models and rotation rates and
discuss the implications for the first stars, for LBV-like phenomena, and for
superluminous supernovae. We find that the shells ejected by pulsational
pair-instability events with rapidly rotating progenitors (>30% the critical
value) are hydrogen-poor and helium and oxygen-rich.

22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an