Using a newly developed Spatial Heterodyne Spectrometer (SHS), we have obtained the first radial velocity resolved emission-line profiles of diffuse [OII] λ3726 and λ3729 doublet emission from the warm (104 K) ionized component of our Galaxy's interstellar medium (WIM). These [OII] lines are a principal coolant for this widespread, photoionized gas and are a tracer of variations in the gas temperature resulting from unidentified heating processes that appear to be acting within the Galaxy's disk and halo.
The Milky Way Halo - Stars and Gas Conference
Scholarly Commons Citation
Reynolds, R. J., Mierkiewicz, E. J., Roesler, F. L., Harlander, J. M., & Jaehnig, K. P. (2007). The First Detection of Diffuse Interstellar [OII] Emission and Confirmation That Variations in [NII]/Hα Trace Variations in Temperature. , (). Retrieved from https://commons.erau.edu/publication/873