The distance and radius of the neutron star PSR B0656+14

被引：82

作者：

Brisken, WF

Thorsett, SE

Golden, A

Goss, WM

机构：

[1] Natl Radio Astron Observ, Socorro, NM 87801 USA

[2] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[3] Natl Univ Ireland, Galway, Ireland

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 593卷 / 02期

基金：

美国国家科学基金会;

关键词：

astrometry; equation of state; pulsars : individual (PSR B0656+14); stars : neutron;

D O I：

10.1086/378184

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the result of astrometric observations of the radio pulsar PSR B0656+14, made using the Very Long Baseline Array. The parallax of the pulsar is pi = 3.47 +/- 0.36 milliarcsec, yielding a distance 288(-27)(+33) pc. This independent distance estimate has been used to constrain existing models of thermal X-ray emission from the neutron star's photosphere. Simple blackbody fits to the X-ray data formally yield a neutron star radius R-infinity similar to 7-8.5 km. With more realistic fits to a magnetized hydrogen atmosphere, any radius between similar to13 and similar to20 km is allowed.

引用

页码：L89 / L92

页数：4

共 28 条

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