Charge-Exchange in X-ray Spectrum of M82
Abstract
We use a new comprehensive charge-exchange (CX) model to study the diffuse emission in M82 based on one XMM-Newton RGS observation. In addition to the thermal emission from hot outflows, the CX emission may arise from the interaction between the ions in the outflow and the ambient neutral gas. One thermal and one CX component with the same single temperature and the metal abundances can well represent all the emission lines in the RGS spectrum after convolving their relevant Chandra images for broadening line profiles, while the model with a lognormal temperature distribution works even better. We measured the total flux of hot ions to cool gas in M82, and the fraction of CX contribution in each line.
- Publication:
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AAS/High Energy Astrophysics Division #13
- Pub Date:
- April 2013
- Bibcode:
- 2013HEAD...1330107Z