| Issue |
A&A
Volume 506, Number 2, November I 2009
|
|
|---|---|---|
| Page(s) | L13 - L16 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361/200810814 | |
| Published online | 17 September 2009 | |
Letter to the Editor
The influence of antikaon condensations on neutrino emissivity from neutron stars
1
Center for Theoretical Physics Jilin University, Changchun 130023, PR China e-mail: lgz@jlu.edu.cn
2
Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, PR China
Received:
17
August
2008
Accepted:
9
September
2009
Neutrino emissivity (
) from the direct URCA
(dURCA) process and the URCA processes with K- and
condensations are considered simultaneously in
neutron star matter. The neutrino emissivity due to the dURCA
process plays a dominant role. However, antikaon condensations
change the chemical potential of electrons, the effective masses of
nucleons and the matrix elements of the reaction for the dURCA
process. These changes make the neutrino emissivity for the dURCA
process decrease. In this case, with antikaon condensations the
total neutrino emissivity becomes lower. We believe that antikaon
condensations are unfavorable for fast cooling of neutron stars.
Key words: stars: neutron / dense matter / neutrinos
© ESO, 2009
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