DIRECT URCA PROCESSES INVOLVING HYPERONS AND COOLING OF NEUTRON-STARS

被引：0

作者：

HAENSEL, P ^{[1
]}

GNEDIN, OY ^{[1
]}

机构：

[1] AF IOFFE INST PHYS & TECHNOL, ST PETERSBURG 194021, RUSSIA

来源：

ASTRONOMY & ASTROPHYSICS | 1994年 / 290卷 / 02期

关键词：

DENSE MATTER; NEUTRON STARS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the effect of the presence of hyperons in dense matter on the neutron star cooling. For several neutron star masses, we consider different scenarios for the stellar interior (with and without nucleon superfluidity), and for the outer layers of the star (with and without strong magnetic field). In the presence of nucleon superfluidity, cooling of a massive neutron star is dominated by the neutrino losses from the direct URCA processes involving hyperons only. Strong surface magnetic field can have a significant effect on the cooling curve. Comparison with recent determination of the effective surface temperature of PSR 0656+14 seems to indicate, that either it does not contain hyperons, or hyperons are superfluid.

引用

页码：458 / 462

页数：5

共 24 条

[1] ROSAT HIGH-RESOLUTION IMAGER OBSERVATIONS OF PSR-0656+14
ANDERSON, SB
CORDOVA, FA
PAVLOV, GG
ROBINSON, CR
THOMPSON, RJ
[J]. ASTROPHYSICAL JOURNAL, 1993, 414 (02) : 867 - 871
[2] BAHCALL JN, 1965, PHYS REV, V140, P1452
[3] DENSE BARYON MATTER CALCULATIONS WITH REALISTIC POTENTIALS
BETHE, HA
JOHNSON, MB
[J]. NUCLEAR PHYSICS A, 1974, A230 (01) : 1 - 58
[4] STRANGENESS, GLUE AND QUARK MATTER CONTENT OF NEUTRON-STARS
ELLIS, J
KAPUSTA, JI
OLIVE, KA
[J]. NUCLEAR PHYSICS B, 1991, 348 (02) : 345 - 372
[5] ROSAT OBSERVATIONS OF PSR-0656+14 - A PULSATING AND COOLING NEUTRON-STAR
FINLEY, JP
OGELMAN, H
KIZILOGLU, U
[J]. ASTROPHYSICAL JOURNAL, 1992, 394 (01) : L21 - L24
[6] ON THE COOLING OF NEUTRON STARS
GLEN, G
SUTHERLAND, P
[J]. ASTROPHYSICAL JOURNAL, 1980, 239 (02) : 671 - 684
[7] NEUTRON-STARS IN THE DERIVATIVE COUPLING MODEL
GLENDENNING, NK
WEBER, F
MOSZKOWSKI, SA
[J]. PHYSICAL REVIEW C, 1992, 45 (02): : 844 - 855
[8] NEUTRON STARS ARE GIANT HYPERNUCLEI
GLENDENNING, NK
[J]. ASTROPHYSICAL JOURNAL, 1985, 293 (02) : 470 - 493
[9] Gnedin O. Yu., 1993, Pis'ma v Astronomicheskie Zhurnal, V19, P280
[10] GNEDIN OY, 1993, IN PRESS PISMA V AST

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