Fermi LAT detection of the supernova remnant SN1006 revisited: The southwest limb

被引：10

作者：

Xing, Yi ^{[1
]}

Wang, Zhongxiang ^{[1
]}

Zhang, Xiao ^{[2
]}

Chen, Yang ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China

[2] Nanjing Univ, Dept Astron, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China

[3] Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210023, Jiangsu, Peoples R China

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2019年 / 71卷 / 04期

基金：

中国国家自然科学基金;

关键词：

acceleration of particles; gamma rays: ISM; ISM: individual objects (SN1006); ISM: supernova remnants; SN-1006; ELECTRONS; EMISSION;

D O I：

10.1093/pasj/psz056

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The data from the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have recently been updated. Thus we re-analyze the LAT data for the supernova remnant (SNR) SN1006. Two parts of gamma-ray emission from the region are clearly resolved, which correspond to the northeast (NE) and southwest (SW) limbs of the SNR. The former has been detected in the previous LAT data (Xing etal. 2016, ApJ, 823, 44), but the latter is newly detected in this work. The detections of the two limbs are at a similar to 4 sigma significance level, and the spectral results for the NE limb are consistent with those obtained in previous detection analyses. We construct the broadband spectral energy distribution (SED) for the SW limb. Different scenarios are considered for its SED in gamma-ray energies. We conclude that, very similarly in the case of the NE limb, the high-energy and very high-energy emissions from the SW limb is likely dominated by the leptonic process, in which high-energy electrons accelerated from the shell region of the SNR inverse-Compton scatter background photons to gamma-rays.

引用

页数：7

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