Swings between rotation and accretion power in a binary millisecond pulsar

被引：362

作者：

Papitto, A. ^{[1
]}

Ferrigno, C. ^{[2
]}

Bozzo, E. ^{[2
]}

Rea, N. ^{[1
]}

Pavan, L. ^{[2
]}

Burderi, L. ^{[3
]}

Burgay, M. ^{[4
]}

Campana, S. ^{[5
]}

Di Salvo, T. ^{[6
]}

Falanga, M. ^{[7
]}

Filipovic, M. D. ^{[8
]}

Freire, P. C. C. ^{[9
]}

Hessels, J. W. T. ^{[10
,11
]}

Possenti, A. ^{[4
]}

Ransom, S. M. ^{[12
]}

Riggio, A. ^{[3
]}

Romano, P. ^{[13
]}

Sarkissian, J. M. ^{[14
]}

Stairs, I. H. ^{[15
]}

Stella, L. ^{[16
]}

Torres, D. F. ^{[1
,17
]}

Wieringa, M. H. ^{[18
]}

Wong, G. F. ^{[8
,14
]}

机构：

[1] Fac Sci, Inst Space Sci ICE IEEC CSIC, E-08193 Barcelona, Spain

[2] Univ Geneva, Dept Astron, ISDC, CH-1290 Versoix, Switzerland

[3] Univ Cagliari, Dipartimento Fis, SP Monserrato Sestu, I-09042 Monserrato, Italy

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

[5] INAF Osservatorio Astron Brera, I-23807 Merate, Lecco, Italy

[6] Univ Palermo, Dipartimento Fis & Chim, I-90123 Palermo, Italy

[7] Int Space Sci Inst, CH-3012 Bern, Switzerland

[8] Univ Western Sydney, Penrith, NSW 1797, Australia

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

[10] ASTRON, NL-7990 AA Dwingeloo, Netherlands

[11] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands

[12] NRAO, Charlottesville, VA 22901 USA

[13] INAF Ist Astrofis Spaziale & Fis Cosm, I-90146 Palermo, Italy

[14] CSIRO Astron & Space Sci, Epping, NSW 1710, Australia

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

[16] INAF Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Roma, Italy

[17] ICREA, Barcelona 08010, Spain

[18] CSIRO Astron & Space Sci, Narrabri, NSW 2390, Australia

来源：

NATURE | 2013年 / 501卷 / 7468期

基金：

加拿大自然科学与工程研究理事会;

关键词：

X-RAY TRANSIENTS; NEUTRON-STARS; EVOLUTION; EMISSION; SPIN; ORBIT;

D O I：

10.1038/nature12470

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

It is thought that neutron stars in low-mass binary systems can accrete matter and angular momentum from the companion star and be spun-up to millisecond rotational periods(1-3). During the accretion stage, the system is called a low-mass X-ray binary, and bright X-ray emission is observed. When the rate of mass transfer decreases in the later evolutionary stages, these binaries host a radio millisecond pulsar(4,5) whose emission is powered by the neutron star's rotating magnetic field(6). This evolutionary model is supported by the detection of millisecond X-ray pulsations from several accreting neutron stars(7,8) and also by the evidence for a past accretion disc in a rotation-powered millisecond pulsar(9). It has been proposed that a rotation-powered pulsar may temporarily switch on(10-12) during periods of low mass inflow(13) in some such systems. Only indirect evidence for this transition has hitherto been observed(14-18). Here we report observations of accretion-powered, millisecond X-ray pulsations from a neutron star previously seen as a rotation-powered radio pulsar. Within a few days after a month-long X-ray outburst, radio pulses were again detected. This not only shows the evolutionary link between accretion and rotation-powered millisecond pulsars, but also that some systems can swing between the two states on very short timescales.

引用

页码：517 / 520

页数：4

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