A RADIO-LOUD MAGNETAR IN X-RAY QUIESCENCE

被引：155

作者：

Levin, Lina ^{[1
,2
]}

Bailes, Matthew ^{[1
]}

Bates, Samuel ^{[3
]}

Bhat, N. D. Ramesh ^{[1
]}

Burgay, Marta ^{[4
]}

Burke-Spolaor, Sarah ^{[1
,2
]}

D'Amico, Nichi ^{[4
,5
]}

Johnston, Simon ^{[2
]}

Keith, Michael ^{[2
]}

Kramer, Michael ^{[3
,6
]}

Milia, Sabrina ^{[4
,5
]}

Possenti, Andrea ^{[4
]}

Rea, Nanda ^{[7
]}

Stappers, Ben ^{[3
]}

van Straten, Willem ^{[1
]}

机构：

[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

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

[3] Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England

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

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

[6] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[7] Fac Ciencies, Inst Ciencies Espai CSIC IEEC, Barcelona 08193, Spain

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 721卷 / 01期

基金：

英国科学技术设施理事会; 澳大利亚研究理事会;

关键词：

pulsars:; individual; (1E; 1547.0-5408; PSR J1622-4950; XTE J1810-197); stars: magnetars; stars: neutron; EMISSION; PULSAR; DISCOVERY;

D O I：

10.1088/2041-8205/721/1/L33

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

As part of a survey for radio pulsars with the Parkes 64 m telescope, we have discovered PSR J1622-4950, a pulsar with a 4.3 s rotation period. Follow-up observations show that the pulsar has the highest inferred surface magnetic field of the known radio pulsars (B similar to 3 x 10(14) G), and it exhibits significant timing noise and appears to have an inverted spectrum. Unlike the vast majority of the known pulsar population, PSR J1622-4950 appears to switch off for many hundreds of days and even in its on-state exhibits extreme variability in its flux density. Furthermore, the integrated pulse profile changes shape with epoch. All of these properties are remarkably similar to the only two magnetars previously known to emit radio pulsations. The position of PSR J1622-4950 is coincident with an X-ray source that, unlike the other radio pulsating magnetars, was found to be in quiescence. We conclude that our newly discovered pulsar is a magnetar-the first to be discovered via its radio emission.

引用

页码：L33 / L37

页数：5

共 26 条

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