Spectral Observations of the Diffuse FUV Background with DUVE (the Diffuse UV Experiment)

Session 43 - The Diffuse ISM: Milky Way and Beyond.
Display session, Tuesday, June 11
Great Hall,

[43.01] Spectral Observations of the Diffuse FUV Background with DUVE (the Diffuse UV Experiment)

E. J. Korpela, S. Bowyer (Univ. of California, Berkeley)

We present results from a search for FUV emission from the diffuse ISM conducted with an orbital FUV spectrometer, DUVE, which was launched in July, 1992. The DUVE spectrometer, which covers the band from 970 Åto 1170 Åwith 3.2 angstrom resolution, observed a region of low neutral hydrogen column desity near the south galactic pole for a total effective integration time of 1583 seconds. The only emission line detected was a geocoronal hydrogen line 1026 ÅWe were, however, able to place upper limits to several important interstellar emission features in this band. We compare these upper limits with predictions of FUV emission based upon several models of the structure of the hot ISM and place limits on the emission measure vs temperature distribution this gas. We also compare these emission measure limits with those obtained from measurements in other optical, UV and X-ray bands.

Program listing for Tuesday