Session 17 - The Galactic Interstellar Gas.
Display session, Monday, January 13
Metropolitan Ballroom,

## [17.02] Spatial Correlation Between Dust and Diffuse Ionized Gas

A. Kogut (HSTX)

Cross-correlation between the COBE full sky surveys shows spatial correlations between microwave emission from the warm ionized interstellar medium and far-infrared emission from high-latitude (|b| > 20^\circ) dust cirrus on angular scales larger than 7^\circ. The amplitude of the correlated component agrees well with estimates of the total emission from the warm ionized medium, suggesting that the correlated component forms a significant fraction of the warm ionized interstellar medium on large angular scales. Cross-correlations of H\alpha maps with the DIRBE 100 \mum survey show statistically significant correlations on angular scales from 0.7 to 7 degrees. I discuss possible variation of the correlation as a function of angular scale.