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Session 7 - Gas and Dust in the ISM.
Display session, Monday, June 10
Great Hall,

[7.19] Mapping the Distribution of 10^-6K Gas Toward the Galactic Poles

M. Juda (SAO)

The diffuse 1/4 keV background at high galactic latitude is a combination of emission from the local interstellar medium (LISM), the galactic halo, and the extragalactic background. Separation of the LISM contribution from the distant ones can be accomplished via the detection of intensity variations in the 1/4 keV background caused by absorption by intervening neutral material. I have searched the ROSAT archive for PSPC observations with |b|>60\deg that are coincident with the IRAS 100 \mum enhancements identified by Désert, Bazell, amp; Boulanger (1988) as likely molecular cirrus clouds. For each field, I have generated maps of the intensity in the 1/4 keV band following the procedure suggested by Snowden et al.\ (1994) and fit for an anticorrelation with the 100 \mum intensity. I will present preliminary results for the derived intensity distributions for the LISM and distant components.

Program listing for Monday