On the soft X-ray emission of M82

Details On the soft X-ray emission of M82 On the soft X-ray emission of M82

2012-04-16

arxiv.org/abs/1204.3357v1

Astronomical Notes, 333, No. 4, 365 - 368 (2012)

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, published in Astronomical Notes, for "Charge exchange in the Universe" workshop, Paris 2011

Scientific paper

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.

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