Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Betelgeuse Project II: Asteroseismology   We explore the question of whether the interior state of massive red
supergiant supernova progenitors can be effectively probed with
asteroseismology. We have computed a suite of ten models with ZAMS masses from
15 to 25 m_sun in intervals of 1 m_sun, including the effects of rotation, with
the stellar evolutionary code MESA. We estimate characteristic frequencies and
convective luminosities of convective zones at two illustrative stages, core
helium burning and off-center convective carbon burning. We also estimate the
power that might be delivered to the surface to modulate the luminous output
considering various efficiencies and dissipation mechanisms. The inner
convective regions should generate waves with characteristic periods of ~20
days in core helium burning, ~10 days in helium shell burning, and 0.1 to 1 day
in shell carbon burning. Acoustic waves may avoid both shock and diffusive
dissipation relatively early in core helium burning throughout most of the
structure. In shell carbon burning, years before explosion, the signal
generated in the helium shell might in some circumstances be weak enough to
avoid shock dissipation, but is subject to strong thermal dissipation in the
hydrogen envelope. Signals from a convective carbon-burning shell are very
likely to be even more severely damped within the envelope. In the most
optimistic case, early in core helium burning, waves arriving close to the
surface could represent luminosity fluctuations of a few millimagnitudes, but
the conditions in the very outer reaches of the envelope suggest severe thermal
damping there.

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The categories of this paper are: nlin
3
The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: math
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph