The First Detection of Diffuse Interstellar [OII] Emission and Confirmation That Variations in [NII]/Hα Trace Variations in Temperature

R. J. Reynolds, E. J. Mierkiewicz, F. L. Roesler, J. M. Harlander, K. P. Jaehnig

Research output: Contribution to conferencePresentation

Abstract

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.

Original languageAmerican English
StatePublished - Jun 1 2007
Externally publishedYes

Keywords

  • interstellar emission
  • Spatial Heterodyne Spectrometer
  • Milky Way

Disciplines

  • Astrophysics and Astronomy

Cite this