Chinese Physics C > 2012, Vol. 36 > Issue(7): 601-604 DOI: 10.1088/1674-1137/36/7/006

Rotochemical heating in hybrid stars withmodified Urca reactions in operation

WEI Wei^,,
CHEN Lei-Lei

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We have recently shown that, as a compact star containing mixed-phase matter slows down, the compression can cause deconfinement phase transition, and thus enhance the chemical deviations and raise the chemical heating efficiency. In a previous study, only the direct Urca processes in nucleon and quark matter were considered. In this work, we extend the previous analysis to the case where the much slower modified Urca processes operate in nucleon matter. We find a fast promotion in the surface effective temperature of hybrid stars, and that the cooling process is dominated by both the nucleon and quark channels.

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WEI Wei and CHEN Lei-Lei. Rotochemical heating in hybrid stars withmodified Urca reactions in operation[J]. Chinese Physics C, 2012, 36(7): 601-604. doi: 10.1088/1674-1137/36/7/006

WEI Wei and CHEN Lei-Lei. Rotochemical heating in hybrid stars withmodified Urca reactions in operation[J]. Chinese Physics C, 2012, 36(7): 601-604. doi:10.1088/1674-1137/36/7/006 shu

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Received: 2011-09-07
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Rotochemical heating in hybrid stars withmodified Urca reactions in operation

Corresponding author:WEI Wei,

Received Date:2011-09-07

Accepted Date:1900-01-01

Available Online:2012-07-05

Abstract:We have recently shown that, as a compact star containing mixed-phase matter slows down, the compression can cause deconfinement phase transition, and thus enhance the chemical deviations and raise the chemical heating efficiency. In a previous study, only the direct Urca processes in nucleon and quark matter were considered. In this work, we extend the previous analysis to the case where the much slower modified Urca processes operate in nucleon matter. We find a fast promotion in the surface effective temperature of hybrid stars, and that the cooling process is dominated by both the nucleon and quark channels.

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Rotochemical heating in hybrid stars withmodified Urca reactions in operation

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