EVOLUTION OF SYNCHROTRON X-RAYS IN SUPERNOVA REMNANTS

被引：23

作者：

Nakamura, Ryoko ^{[1
]}

Bamba, Aya ^{[1
,2
,3
,4
]}

Dotani, Tadayasu ^{[1
]}

Ishida, Manabu ^{[1
]}

Yamazaki, Ryo ^{[4
]}

Kohri, Kazunori ^{[5
]}

机构：

[1] ISAS JAXA Dept High Energy Astrophys, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan

[2] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[3] Dublin Inst Adv Studies, Sch Cosm Phys, Dublin 2, Ireland

[4] Aoyama Gakuin Univ, Dept Math & Phys, Sagamihara, Kanagawa 2525258, Japan

[5] High Energy Accelerator Res Org, KEK, Inst Particle & Nucl Studies, Ctr Theory, Tsukuba, Ibaraki 3050801, Japan

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 746卷 / 02期

关键词：

acceleration of particles; ISM: supernova remnants; X-rays: ISM; FERMI-LAT DISCOVERY; GAMMA-RAYS; PARTICLE-ACCELERATION; NEUTRAL HYDROGEN; RX J1713.7-3946; MAGNETIC-FIELD; PROPER MOTIONS; CASSIOPEIA-A; COSMIC-RAYS; RCW; 86;

D O I：

10.1088/0004-637X/746/2/134

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A systematic study of the synchrotron X-ray emission from supernova remnants (SNRs) has been conducted. We selected a total of 12 SNRs whose synchrotron X-ray spectral parameters are available in the literature with reasonable accuracy and studied howtheir luminosities change as a function of radius. It is found that the synchrotron X-ray luminosity tends to drop especially when the SNRs become larger than similar to 5 pc, despite large scatter. This may be explained by the change of spectral shape caused by the decrease of the synchrotron roll-off energy. A simple evolutionary model of the X-ray luminosity is proposed and is found to reproduce the observed data approximately, with reasonable model parameters. According to the model, the total energy of accelerated electrons is estimated to be 10(47-48) erg, which is well below the supernova explosion energy. The maximum energies of accelerated electrons and protons are also discussed.

引用

页数：5

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