Hyperons in neutron star matter within relativistic mean-field models

被引：114

作者：

Oertel, M. ^{[1
]}

Providencia, C. ^{[2
]}

Gulminelli, F. ^{[3
]}

Raduta, Ad R. ^{[4
]}

机构：

[1] Univ Paris Diderot, Observ Paris, CNRS, LUTH, F-92195 Meudon, France

[2] Univ Coimbra, Dept Phys, Ctr Fis Computac, P-3004056 Coimbra, Portugal

[3] Univ Caen Basse Normandie, LPC, ENSICAEN, CNRS,UMR6534, F-14050 Caen, France

[4] IFIN HH, Bucharest, Romania

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2015年 / 42卷 / 07期

关键词：

neutron stars; equation of state; thermodynamic instabilities; EQUATION-OF-STATE; MAXIMUM MASS; LAMBDA; HYPERNUCLEI; CORES;

D O I：

10.1088/0954-3899/42/7/075202

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Since the discovery of neutron stars with masses around 2 M-circle dot the composition of matter in the central part of these massive stars has been intensively discussed. Within this paper we will (re)investigate the question of the appearance of hyperons. To that end we will perform an extensive parameter study within relativistic mean field models. We will show that it is possible to obtain high mass neutron stars with (i) a substantial amount of hyperons, (ii) radii of 12-13 km for the canonical mass of 1.4 M-circle dot, and (iii) a spinodal instability at the onset of hyperons. The results depend strongly on the interaction in the hyperon- hyperon channels, on which only very little information is available from terrestrial experiments up to now.

引用

页数：25

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