An expanding radio nebula produced by a giant flare from the magnetar SGR 1806-20

被引：143

作者：

Gaensler, BM

Kouveliotou, C

Gelfand, JD

Taylor, GB

Eichler, D

Wijers, RAMJ

Granot, J

Ramirez-Ruiz, E

Lyubarsky, YE

Hunstead, RW

Campbell-Wilson, D

van der Horst, AJ

McLaughlin, MA

Fender, RP

Garrett, MA

Newton-McGee, KJ

Palmer, DM

Gehrels, N

Woods, PM

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35805 USA

[3] Univ Space Res Assoc, NSSTC, Huntsville, AL 35805 USA

[4] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA

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

[6] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[7] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands

[8] Inst Adv Study, Princeton, NJ 08540 USA

[9] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

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

[11] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[12] Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands

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

[14] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[15] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

NATURE | 2005年 / 434卷 / 7037期

关键词：

D O I：

10.1038/nature03498

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：

Soft gamma-ray repeaters (SGRs) are 'magnetars', a small class of slowly spinning neutron stars with extreme surface magnetic fields, B approximate to 10(15) gauss (refs 1-3). On 27 December 2004, a giant flare(4) was detected from the magnetar SGR 1806-20 (ref. 2), only the third such event recorded(5,6). This burst of energy was detected by a variety of instruments(7,8) and even caused an ionospheric disturbance in the Earth's upper atmosphere that was recorded around the globe(9). Here we report the detection of a fading radio afterglow produced by this outburst, with a luminosity 500 times larger than the only other detection of a similar source(10). From day 6 to day 19 after the flare from SGR 1806-20, a resolved, linearly polarized, radio nebula was seen, expanding at approximately a quarter of the speed of light. To create this nebula, at least 4 x 10(43) ergs of energy must have been emitted by the giant flare in the form of magnetic fields and relativistic particles.

引用

页码：1104 / 1106

页数：3

共 27 条

[1] The velocity distribution of isolated radio pulsars [J].