Does the Milky Way launch a large-scale wind?

Details Does the Milky Way launch a large-scale wind? Does the Milky Way launch a large-scale wind?

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap%26ss.311..105e&link_type=abstract

Astrophysics and Space Science, Volume 311, Issue 1-3, pp. 105-110

Astronomy and Astrophysics

Astrophysics

2

Ism: Outflows, Galaxy: Bulge, Galaxy: Dynamics, Galaxy: Evolution

Scientific paper

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.

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