On the soft X-ray emission of M82
Abstract
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.
Keywords
Cite
@article{arxiv.1204.3357,
title = {On the soft X-ray emission of M82},
author = {Jiren Liu and Q. Daniel Wang and Shude Mao},
journal= {arXiv preprint arXiv:1204.3357},
year = {2015}
}
Comments
4 pages, published in Astronomical Notes, for "Charge exchange in the Universe" workshop, Paris 2011