| Type |
Journal Article |
| Names |
John E. Everett, Quintin G. Schiller, Ellen G. Zweibel |
| Publication |
The Astrophysical Journal |
| Volume |
711 |
| Issue |
1 |
| Pages |
13-24 |
| Date |
March 1, 2010 |
| URL |
http://adsabs.harvard.edu/abs/2010ApJ...711...13E |
| Library Catalog |
NASA ADS |
| Abstract |
Cosmic rays and magnetic fields can substantially impact the launching
of large-scale galactic winds. Many researchers have investigated the
role of cosmic rays; our group previously showed that a cosmic-ray and
thermally driven wind could explain soft X-ray emission toward the
center of the Galaxy. In this paper, we calculate the synchrotron
emission from our original wind model and compare it to observations;
the synchrotron data show that earlier assumptions about the launching
conditions of the wind must be changed: we are required to improve that
earlier model by restricting the launching region to the domain of the
inner "Molecular Ring," and by decreasing the magnetic field strength
from the previously assumed maximum strength. With these physically
motivated modifications, we find that a wind model can fit both the
radio synchrotron and the X-ray emission, although that model is
required to have a higher gas pressure and density than the previous
model in order to reproduce the observed X-ray emission within the
smaller "footprint." The drop in magnetic field also decreases the
effect of cosmic-ray heating, requiring a higher temperature at the base
of the wind than the previous model. |
| Tags |
COSMIC RAYS, Galaxy: evolution, Galaxy: kinematics and dynamics, ISM: jets and outflows, ISM: magnetic fields, X-Rays: Diffuse Background |