Hot Coronae in Local AGN: Present Status and Future Perspectives

被引：6

作者：

Marinucci, Andrea ^{[1
]}

Tamborra, Francesco ^{[2
]}

Bianchi, Stefano ^{[1
]}

Dovciak, Michal ^{[2
]}

Matt, Giorgio ^{[1
]}

Middei, Riccardo ^{[1
]}

Tortosa, Alessia ^{[1
,3
]}

机构：

[1] Univ Roma Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy

[2] Czech Acad Sci, Astron Inst, CZ-14100 Prague, Czech Republic

[3] INAF, Ist Astrofis & Planetol Spaziali, Via Fosso del Cavaliere, I-00133 Rome, Italy

来源：

GALAXIES | 2018年 / 6卷 / 02期

关键词：

AGN; X-ray polarimetry; accretion;

D O I：

10.3390/galaxies6020044

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The nuclear X-ray emission in radio-quiet Active Galactic Nuclei (AGN) is commonly believed to be due to inverse Compton scattering of soft UV photons in a hot corona. The radiation is expected to be polarized, the polarization degree depending mainly on the geometry and optical depth of the corona. Nuclear Spectroscopic Telescope Array (NuSTAR) observations are providing for the first time high quality measurements of the coronal physical parameters-temperature and optical depth. We hereby review the NuSTAR results on the coronal physical parameters (temperature and optical depth) and discuss their implications for future X-ray polarimetric studies.

引用

页数：7

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