| Type |
Conference Paper |
| Names |
Melissa Halford, E. J. Mierkiewicz, R. J. Reynolds, G. J. Madsen, L. M. Haffner, K. A. Barger, F. L. Roesler |
| Proceedings Title |
Bulletin of the American Astronomical Society |
| Conference Name |
American Astronomical Society, AAS Meeting #217, #251.09 |
| Volume |
43 |
| Date |
January 1, 2011 |
| URL |
http://adsabs.harvard.edu/abs/2011AAS...21725109H |
| Library Catalog |
NASA ADS |
| Abstract |
Using data from the Wisconsin Hydrogen Alpha Mapper (WHAM) and Pine
Bluff Observatory's Spatial Heterodyne Spectrometer (SHS), we studied
the warm ionized component of the Galaxy's interstellar medium (WIM).
Line ratios of H-alpha, [N II], [O II] and [S II] emission were used to
study the WIM gas in both the local spiral arm and more distant areas of
the Galaxy. The strength of the [S II] line was used to measure the
ionization state in a set of nine look directions and ratios of [N
II]/H-alpha and [O II]/H-alpha provide a measure of temperature. Our
study expands upon and confirms the results of previous [O II] studies
of the WIM, which limited themselves to line ratios including only the
local component of the [O II] emission. The work presented here includes
a detailed component analysis of WIM emission from non-local gas in the
kinematically distinct Perseus spiral arm and uses [S II] data that was
not available in the previous [O II] study. This work was supported by
the National Science Foundation's REU program through NSF Award
AST-1004881. WHAM is funded by the National Science Foundation through
grant AST-0607512; the [OII] SHS is funded by the National Science
Foundation through grant AST-0908894. |