Observational evidence for strange matter in compact objects from the x-ray burster 4U 1820-30

被引：126

作者：

Bombaci, I ^{[1
]}

机构：

[1] IST NAZL FIS NUCL, SEZ PISA, I-56100 PISA, ITALY

来源：

PHYSICAL REVIEW C | 1997年 / 55卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.55.1587

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：

We present systematic calculations of the mass-radius (MR) relation of a neutron star (NS) using a large variety of modern equations of state (EOS) of dense matter. The role of strangeness on the EOS and on the MR relation is particularly emphasized. Theoretical results are then compared with the semiempirical MR relation recently extracted for the x-ray burst source 4U 1820-30. Based on this comparison, we propose that the compact object in 4U 1820-30 is a kaon-condensed nucleon star or a strange star.

引用

页码：1587 / 1590

页数：4

共 33 条

[11] Massive quarks in neutron stars [J].

Drago, A ;

Tambini, U ;

HjorthJensen, M .

PHYSICS LETTERS B, 1996, 380 (1-2) :13-17

[12] STRANGE MATTER [J].

FARHI, E ;

JAFFE, RL .

PHYSICAL REVIEW D, 1984, 30 (11) :2379-2390

[13] NEUTRON STARS ARE GIANT HYPERNUCLEI [J].

GLENDENNING, NK .

ASTROPHYSICAL JOURNAL, 1985, 293 (02) :470-493

[14] PROMPT SUBSIDENCE OF A PROTO-NEUTRON STAR INTO A BLACK-HOLE [J].

GLENDENNING, NK .

ASTROPHYSICAL JOURNAL, 1995, 448 (02) :797-802

[15]

HABERL F, 1995, ASTRON ASTROPHYS, V299, P414

[16] HEAVY-QUARK-ANTIQUARK POTENTIAL IN THE MIT BAG MODEL [J].

HAXTON, WC ;

HELLER, L .

PHYSICAL REVIEW D, 1980, 22 (05) :1198-1208

[17] X-RAY BURSTS AND NEUTRON-STAR THERMONUCLEAR FLASHES [J].

JOSS, PC .

NATURE, 1977, 270 (5635) :310-314

[18]

KEIL W, 1995, ASTRON ASTROPHYS, V296, P145

[19] Strangeness in hadronic stellar matter [J].

Knorren, R ;

Prakash, M ;

Ellis, PJ .

PHYSICAL REVIEW C, 1995, 52 (06) :3470-3482

[20]

LEWIN WHG, 1992, SPACE SCI REV, V62, P223, DOI 10.1007/BF00196124

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