On the soft X-ray emission of M82

被引：4

作者：

Liu, J. ^{[1
]}

Wang, Q. D. ^{[2
]}

Mao, S. ^{[1
,3
]}

机构：

[1] Natl Astron Observ, Beijing 100012, Peoples R China

[2] Univ Massachusetts, Dept Astron, Amherst, MA 01002 USA

[3] Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

来源：

ASTRONOMISCHE NACHRICHTEN | 2012年 / 333卷 / 04期

关键词：

atomic processes; galaxies: individual (M82); galaxies: starburst; X-rays: galaxies; REFLECTION GRATING SPECTROMETER; STAR-FORMING GALAXIES; BOARD XMM-NEWTON; ALPHA; PLASMAS; HALOS; WIND; IONS; GAS;

D O I：

10.1002/asna.201211667

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a spatial analysis of the soft X-ray and H alpha emissions from the outflow of the starburst galaxy M82. We find that the two emissions are tightly correlated on various scales. The O VII triplet of M82, as resolved by X-ray grating observations of XMM-Newton, is dominated by the forbidden line, inconsistent with the thermal prediction. The O VII triplet also shows some spatial variations. We discuss three possible explanations for the observed O VII triplet, including the charge exchange at interfaces between the hot outflow and neutral cool gas, a collisional non-equilibrium-ionization recombining plasma, and resonance scattering. (c) 2012 WILEY-VCH Verlag GmbH&Co. KGaA, Weinheim

引用

页码：365 / 368

页数：4

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