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
收藏
页码：365 / 368
页数：4
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