Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1702k&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #17.02; Bulletin of the American Astronomical Society, V
Other
Scientific paper
We have observed 2/3 of the FUV sky (between 900 and 1700 Angstroms) with the SPEAR imaging spectrometer. From these data, we have extracted maps of CIV (1550 Å) and OVI (1032 Å) emission. These emission lines are likely to be the dominant cooling mechanism for 1×105 and 3×105 K gas respectively, in transition from the hot to the warm phase of the Galactic ISM. SPEAR's unprecedented spectral and spatial coverage of FUV-emitting gas allows us to study this gas over the sky, giving us a new look at the large-scale distribution of this transition-temperature gas in the Galaxy. We present comparisons of our emission intensities with published absorption columns measured by Copernicus, HST, IUE, HUT, and FUSE. Such comparisons can provide constraints on the electron density and other physical properties of the gas that can lead to a determination of the filling factor of this elusive medium.
The SPEAR (or FIMS) instrument is supported by NASA grant NAG5-5355 and flies on the STSAT-1 Mission, supported by the Korea Ministry of Science and Technology.
Edelstein José
Han Wei
Heiles Carl
Kregenow Julia M.
Lee Daehee
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