Orphan γ-ray flares from relativistic blobs encountering luminous stars

被引：15

作者：

Banasinski, P. ^{[1
]}

Bednarek, W. ^{[1
]}

Sitarek, J. ^{[1
]}

机构：

[1] Univ Lodz, Dept Astrophys, Ul Pomorska 149-153, PL-90236 Lodz, Poland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 463卷 / 01期

关键词：

radiation mechanisms: non-thermal; stars: massive; galaxies: active; galaxies: individual: PKS 1222+21; gamma-rays: general; ACTIVE GALACTIC NUCLEI; BASE-LINE ARRAY; EMISSION; JETS; GALAXIES; QUASARS; OBJECTS;

D O I：

10.1093/mnrasl/slw149

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose that gamma-rays in blazars can be produced during encounters of relativistic blobs of plasma with radiation field produced by luminous stars within (or close to) the jet. The blob is expected to contain relativistic electrons which Comptonize stellar radiation to the GeV-TeV energies. Produced gamma-rays can initiate the inverse Compton e(+/-) pair cascade in the stellar radiation. We propose that such a scenario can be responsible for the appearance of the so-called orphan gamma-ray flares. We show that the relativistic blob/luminous star collision model can explain the appearance of the extreme orphan gamma-ray flare observed in the GeV and sub-TeV energy range from the flat-spectrum radio quasar PKS 1222+21.

引用

页码：L26 / L30

页数：5

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