| Issue |
A&A
Volume 555, July 2013
|
|
|---|---|---|
| Article Number | L10 | |
| Number of page(s) | 5 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361/201321541 | |
| Published online | 15 July 2013 | |
Rapid cooling of Cassiopeia A as a phase transition in dense QCD
Institute for Theoretical Physics, J. W. Goethe University,
60438
Frankfurt am Main,
Germany
e-mail:
sedrakian@th.physik.uni-frankfurt.de
Received:
21
March
2013
Accepted:
19
June
2013
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 ~ 2 M⊙ star and is, therefore, distinctive from models invoking canonical 1.4 M⊙ mass star with nucleonic pairing alone.
Key words: dense matter / stars: neutron / pulsars: general
© ESO, 2013
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