The supernova remnant SN 1006 as a Galactic particle accelerator

被引：20

作者：

Giuffrida, Roberta ^{[1
,2
]}

Miceli, Marco ^{[1
,2
]}

Caprioli, Damiano ^{[3
,4
]}

Decourchelle, Anne ^{[5
]}

Vink, Jacco ^{[6
]}

Orlando, Salvatore ^{[2
]}

Bocchino, Fabrizio ^{[2
]}

Greco, Emanuele ^{[2
,6
,7
]}

Peres, Giovanni ^{[1
,2
]}

机构：

[1] Univ Palermo, Dipartimento Fis & Chim E Segre, Piazza Parlamento 1, I-90134 Palermo, Italy

[2] INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy

[3] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA

[4] Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA

[5] Univ Paris Saclay, Univ Paris Cite, AIM, CNRS,CEA, F-91191 Gif Sur Yvette, France

[6] Univ Amsterdam, Anton Pannekoek Inst, GRAPPA, POB 94249, NL-1090 GE Amsterdam, Netherlands

[7] Univ Amsterdam, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

来源：

NATURE COMMUNICATIONS | 2022年 / 13卷 / 01期

关键词：

DIFFUSIVE SHOCK ACCELERATION; PHOTON IMAGING CAMERA; AZIMUTHAL VARIATIONS; COSMIC-RAYS; XMM-NEWTON; EMISSION; SN-1006; ESCAPE;

D O I：

10.1038/s41467-022-32781-4

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 known that cosmic rays could be accelerated by shock waves in supernova (SN) remnants. Here, the authors show that SN 1006 remnant is an efficient source of cosmic rays, providing observational support for the quasi-parallel acceleration mechanism. The origin of cosmic rays is a pivotal open issue of high-energy astrophysics. Supernova remnants are strong candidates to be the Galactic factory of cosmic rays, their blast waves being powerful particle accelerators. However, supernova remnants can power the observed flux of cosmic rays only if they transfer a significant fraction of their kinetic energy to the accelerated particles, but conclusive evidence for such efficient acceleration is still lacking. In this scenario, the shock energy channeled to cosmic rays should induce a higher post-shock density than that predicted by standard shock conditions. Here we show this effect, and probe its dependence on the orientation of the ambient magnetic field, by analyzing deep X-ray observations of the Galactic remnant of SN 1006. By comparing our results with state-of-the-art models, we conclude that SN 1006 is an efficient source of cosmic rays and obtain an observational support for the quasi-parallel acceleration mechanism.

引用

页数：11

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