Does the Milky Way launch a large-scale wind?

被引：0
|
作者：
John E. Everett
Ellen G. Zweibel
Robert A. Benjamin
Dan McCammon
Lindsay Rocks
Donald P. Cox
John S. Gallagher
机构：
[1] University of Wisconsin-Madison,Department of Astronomy
[2] University of Wisconsin-Madison,Department of Physics
[3] Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas,Department of Physics
[4] University of Wisconsin-Whitewater,undefined
来源：
Astrophysics and Space Science | 2007年 / 311卷
关键词：
ISM: outflows; Galaxy: bulge; Galaxy: dynamics; Galaxy: evolution;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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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页码：105 / 110
页数：5
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