The extended X-ray emission around RRAT J1819-1458

被引：12

作者：

Camero-Arranz, A. ^{[1
]}

Rea, N. ^{[1
]}

Bucciantini, N. ^{[2
,3
]}

McLaughlin, M. A. ^{[4
]}

Slane, P. ^{[5
]}

Gaensler, B. M. ^{[6
]}

Torres, D. F. ^{[1
,7
]}

Stella, L. ^{[8
]}

de Ona, E. ^{[1
]}

Israel, G. L. ^{[8
]}

Camilo, F. ^{[9
,10
]}

Possenti, A. ^{[11
]}

机构：

[1] Fac Ciencies, Inst Ciencies Espai IEEC CSIC, E-08193 Barcelona, Spain

[2] INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy

[3] INFN Sez Firenze, I-50019 Florence, Italy

[4] W Virginia Univ, Dept Phys, Morgantown, WV 26501 USA

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

[6] Univ Sydney, Redfern, NSW 2016, Australia

[7] Passeig Lluis Co, ICREA, E-08010 Barcelona, Spain

[8] INAF Osservatorio Astron Roma, I-00040 Rome, Italy

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

[10] Arecibo Observ, Arecibo, PR 00612 USA

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

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2013年 / 429卷 / 03期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

stars: magnetic field; stars: neutron; pulsars: individual: RRAT J1819-1458; X-rays: stars; DISCOVERY; SCATTERING; EVOLUTION; DISTANCE; PULSARS;

D O I：

10.1093/mnras/sts531

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high magnetic field rotating radio transient RRAT J1819-1458. We used two Chandra observations performed for this object in 2008 May 31 and 2011 May 28, respectively. The diffuse X-ray emission was detected with a significance of similar to 19 sigma in the image obtained by combining the two observations. Neither long-term spectral nor timing variability has been observed from the source or the nebula. RRAT J1819-1458 shows an unusual high X-ray efficiency of eta(X) = L-X(0.3 5 keV)/(E) over dot(rot) similar to 0.15 at converting spin-down power into X-ray luminosity. The most favourable scenario for the origin of this extended X-ray emission is either a pulsar wind nebula or a scattering halo. A magnetically powered scenario for the extended emission is viable only in the case of a Compton nebula, while it can be tentatively disfavoured in the case of synchrotron emission.

引用

页码：2493 / 2499

页数：7

共 23 条

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