Abstract
The ROSAT All-Sky Survey revealed soft X-ray emission on kiloparsec scales towards the Galactic center. Separately, it has also been observed that the cosmic ray intensity (measured via γ-ray emission) rises only very slowly towards the center of the Galaxy, counter to expectations based on the greater number of cosmic ray sources there. A thermal and cosmic-ray driven wind could potentially explain both of these observations. We find that a cosmic-ray and thermally driven wind fits the X-ray observations well; in fact, a wind fits significantly better than an earlier-proposed static-polytrope gas model.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 105-110 |
| Number of pages | 6 |
| Journal | Astrophysics and Space Science |
| Volume | 311 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Oct 2007 |
Funding
Acknowledgements We thank Dr. Richard Almy for the already-developed code to map X-ray emission, and Dr. Sebastian Heinz for helpful comments and questions. This work was supported by NSF AST-0507367 and NSF PHY-0215581 (to the Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas).
Keywords
- Galaxy: bulge
- Galaxy: dynamics
- Galaxy: evolution
- ISM: outflows
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science