Accelerated expansion of the Crab Nebula and evaluation of its neutron-star parameters

被引：31

作者：

Bejger, M ^{[1
]}

Haensel, P ^{[1
]}

机构：

[1] Polish Acad Sci, N Copernicus Astron Ctr, PL-00716 Warsaw, Poland

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 405卷 / 02期

关键词：

stars : neutron; stars : pulsars : individual : Crab; ISM : supernova remnants;

D O I：

10.1051/0004-6361:20030642

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A model of an accelerated expansion of the Crab Nebula powered by the spinning-down Crab pulsar is proposed, in which time dependence of the acceleration is connected to the evolution of pulsar luminosity. Using recent observational data, we derive estimates of the Crab neutron-star moment of inertia. Correlations between the neutron star moment of inertia and its mass and radius allow for rough estimates of the Crab neutron-star radius and mass. In contrast to the previously used constant-acceleration approximation, even for the expanding nebula mass of similar to7 M-circle dot the results obtained within our model are not in conflict with the modern stiff equations of state of dense matter.

引用

页码：747 / 751

页数：5

共 17 条

[1] COMMENT ON STRANGE STARS [J].

ALPAR, MA .

PHYSICAL REVIEW LETTERS, 1987, 58 (20) :2152-2152

[2] Moments of inertia for neutron and strange stars: Limits derived for the Crab pulsar [J].

Bejger, M ;

Haensel, P .

ASTRONOMY & ASTROPHYSICS, 2002, 396 (03) :917-921

[3]

Chevalier R. A., 1977, SUPERNOVAE, P53

[4]

DAVIDSON K, 1985, ANNU REV ASTRON ASTR, V23, P119

[5] Dust in the Tycho, Kepler and Crab supernova remnants [J].

Douvion, T ;

Lagage, PO ;

Cesarsky, CJ ;

Dwek, E .

ASTRONOMY & ASTROPHYSICS, 2001, 373 (01) :281-291

[6] Second report on the expansion of the Crab nebula [J].

Duncan, JC .

ASTROPHYSICAL JOURNAL, 1939, 89 (04) :482-485

[7] An optical study of the circumstellar environment around the Crab Nebula [J].

Fesen, RA ;

Shull, JM ;

Hurford, AP .

ASTRONOMICAL JOURNAL, 1997, 113 (01) :354-+

[8]

HAENSEL P, 1990, IAU C, V128, P217

[9] CRAB PULSAR TIMING 1982-87 [J].

LYNE, AG ;

PRITCHARD, RS ;

SMITH, FG .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1988, 233 (03) :667-676

[10] PHOTOMETRY OF THE CRAB-NEBULA - VARIABILITY AND THE MASS OF EMITTING GAS [J].

MACALPINE, GM ;

UOMOTO, A .

ASTRONOMICAL JOURNAL, 1991, 102 (01) :218-223

← 1 2 →