An eclipsing millisecond pulsar with a possible main-sequence companion in NGC 6397

被引：108

作者：

D'Amico, N

Possenti, A

Manchester, RN

Sarkissian, J

Lyne, AG

Camilo, F

机构：

[1] Osservatorio Astron Bologna, I-40127 Bologna, Italy

[2] CNR, Ist Radioastron, I-40126 Bologna, Italy

[3] CSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, Australia

[4] CSIRO, Parkes Observ, Australia Telescope Natl Facil, Parkes, NSW 2870, Australia

[5] Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England

[6] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 561卷 / 01期

基金：

美国国家航空航天局;

关键词：

binaries : close; globular clusters : individual (NGC 6397); pulsars : individual (PSR J1740-5340);

D O I：

10.1086/324562

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of 1 yr of pulse timing observations of PSR J1740-5340, an eclipsing millisecond pulsar located in the globular cluster NGC 6397. We have obtained detailed orbital parameters and a precise position for the pulsar. The radio pulsar signal shows frequent interactions with the atmosphere of the companion and suffers significant and strongly variable delays and intensity variations over a wide range of orbital phases. These characteristics and the binary parameters indicate that the companion may be a bloated main-sequence star or the remnant (still overflowing its Roche lobe) of the star that spun up the pulsar. In both cases, this would be the first binary millisecond pulsar system known with such a companion.

引用

页码：L89 / L92

页数：4

共 21 条

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Burderi L, 2001, ASTR SOC P, V229, P455

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