Rapid cooling of the compact star in Cassiopea A as a phase transition in dense QCD - INSPIRE

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Rapid cooling of the compact star in Cassiopea A as a phase transition in dense QCD

Armen Sedrakian
(
- Frankfurt U.
)

Mar 21, 2013

5 pages

Published in:

Astron.Astrophys. 555 (2013) L10

e-Print:

1303.5380 [astro-ph.HE]

DOI:

10.1051/0004-6361/201321541

View in:

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Abstract: (arXiv)

We present a model of the compact star in Cassiopea A that accounts for its unusually fast cooling behavior. This feature is interpreted as an enhancement in the neutrino emission triggered by a transition from a fully gapped, two-flavor, color-superconducting phase to a crystalline phase or an alternative gapless, color-superconducting phase. By fine-tuning a single parameter -- the temperature of this transition -- a specific cooling scenario can be selected that fits the Cas A data. Such a scenario requires a massive

M\sim 2M_{\odot}

star and is, therefore, distinctive from models invoking canonical 1.4

M_{\odot}

mass star with nucleonic pairing alone.

Note:

5 pages, 3 figures, v2 and v3: minor changes, matches the version publised in A & A Letters

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