Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.5110g&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #51.10; Bulletin of the American Astronomical Society, Vol. 29, p.1297
Astronomy and Astrophysics
Astronomy
Scientific paper
The diffuse soft X-ray background below 1 keV is dominated by a superposition of hot Galactic plasma emission, both local and from the Galactic halo. A method for differentiating the local from the more distant emission is through the use of X-ray shadows in which cold molecular clouds absorb the distant X-rays. We will present results of analysis of ROSAT PSPC data towards ten molecular clouds covering a range of Galactic latitudes and distances. Spatial anti-correlation between IRAS 100 mu m and X-ray emission indicates the strength of the absorption effect. For the 1/4-keV band, the low latitude fields will help define the size of the local hot bubble, while the high latitude fields will constrain the extent and importance of million degree halo gas. In the 3/4-keV band, both low and high latitude fields will be used to understand the source(s) of the emission by determining its spatial structure. Comparisons will be made with the complementary surveys by Kuntz, Snowden and Verter, 1997 (ApJ 484, 245), Juda, 1996 (BAAS 188, 07.19), and Wang and Yu, 1995 (AJ 109, 698).
Burrows David N.
Grant Catherine E.
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