Other
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.2703h&link_type=abstract
American Astronomical Society, 196th AAS Meeting, #27.03; Bulletin of the American Astronomical Society, Vol. 32, p.714
Other
Scientific paper
We report on the properties of interstellar O VI absorption observed with the Far Ultraviolet Spectroscopic Explorer (FUSE) in the directions of approximately 10 stars in the Large Magellanic Cloud (LMC). O VI is a tracer of hot, collisionally-ionized material (T > 3x105 K). It is unlikely to be created by photoionization since stars produce few photons with the required energy (114 eV). The FUSE data, which have a spectral resolution of ~15,000 ( ~20 km/s), show O VI 1032 Angstroms absorption from both the Milky Way and LMC towards these stars. The LMC absorption is patchy, with column densities in the range log N(O VI) = 13.9 to 14.5 (in atoms cm-2), and a mean of 14.3+/-0.3 (s.d.). For comparison, the halo of the Milky Way in this direction shows log N(O VI) = 14.4 to 14.5. The LMC absorption is often quite broad (as much as 100 km/sec) and likely contains a significant non-thermal component. We discuss the large-scale distribution of O VI within the LMC and its relationship to other phases of the interstellar medium. This work is based on data obtained for the Guaranteed Time Team by the NASA-CNES-CSA FUSE mission operated by the Johns Hopkins University. Financial support to U. S. participants has been provided by NASA contract NAS5-32985.
Friedman Scott David
FUSE VI Working Group O.
Howk Chris J.
Jenkins Edward B.
Savage Blair. D.
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