| Type |
Conference Paper |
| Names |
Alex S. Hill, M. R. Joung, R. A. Benjamin, L. M. Haffner, C. Klingenberg, M. M. Mac Low, K. Waagan, K. A. Wood |
| Proceedings Title |
Bulletin of the American Astronomical Society |
| Conference Name |
American Astronomical Society, AAS Meeting #217, #251.06 |
| Volume |
43 |
| Date |
January 1, 2011 |
| URL |
http://adsabs.harvard.edu/abs/2011AAS...21725106H |
| Library Catalog |
NASA ADS |
| Abstract |
We present new 3D MHD simulations of a supernova-driven, stratified
interstellar medium. We have previously shown that the density
distribution arising from hydrodynamical versions of these simulations
creates low-density pathways through which Lyman continuum photons can
travel to heights |z| > 1 kpc. This naturally produces the warm
ionized medium through photoionization due primarily to O stars near the
plane. However, the hydrodynamical models reproduce the peak but not the
width of the emission measure distribution observed in Wisconsin H-Alpha
Mapper (WHAM) data. Here, we discuss the role of magnetic fields in the
structure of gas away from the plane. We compare emission measure
distributions from models with varying magnetic field strengths to the
WHAM observations.
The simulations were performed using the adaptive mesh refinement grid
code FLASH with the new MHD solver developed by Waagan et al.
This work was partly supported by NASA/SAO grant TM0-11008X and by NSF
grant AST-0607512. |