期刊
ASTRONOMISCHE NACHRICHTEN
卷 333, 期 4, 页码 365-368出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asna.201211667
关键词
atomic processes; galaxies: individual (M82); galaxies: starburst; X-rays: galaxies
资金
- STFC [ST/J001562/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001562/1] Funding Source: researchfish
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
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