Long-term variations in the pulse emission from PSR J0737-3039B

被引：57

作者：

Burgay, M

Possenti, A

Manchester, RN

Kramer, M

McLaughlin, MA

Lorimer, DR

Stairs, IH

Joshi, BC

Lyne, AG

Camilo, F

D'Amico, N

Freire, PCC

Sarkissian, JM

Hotan, AW

Hobbs, GB

机构：

[1] Osservatorio Astron Cagliari, INAF, I-09012 Capoterra, Italy

[2] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia

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

[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[5] Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India

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

[7] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Italy

[8] Arecibo Observ, Natl Astron & Ionosphere Ctr, Arecibo, PR 00612 USA

[9] Swinburne Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 624卷 / 02期

基金：

美国国家航空航天局; 加拿大自然科学与工程研究理事会;

关键词：

binaries : general; pulsars : general; pulsars : individual (PSR J0737-3039B);

D O I：

10.1086/430668

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Analysis of 20 months of observations at the Parkes radio telescope shows secular changes in the pulsed emission from J0737 - 3039B, the 2.77 s pulsar of the double-pulsar system. Pulse profiles are becoming single-peaked in both bright phases of the orbital modulation, although there is no clear variation in overall pulse width. The shape of the orbital modulation is also varying systematically, with both bright phases shrinking in longitude by ∼ 7° yr(-1). However, the combined span of the two bright phases is relatively constant, and together they are shifting to higher longitudes at a rate of ∼ 3° yr(-1). We discuss the possible contributions of geodetic precession and periastron advance to the observed variations.

引用

页码：L113 / L116

页数：4

共 20 条

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