FUV Interstellar Absorption Toward the Lupus Loop Region (abstract)

Details FUV Interstellar Absorption Toward the Lupus Loop Region (abstract) FUV Interstellar Absorption Toward the Lupus Loop Region (abstract)

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1119r.204b&link_type=abstract

WOMEN IN PHYSICS: Third IUPAP International Conference on Women in Physics. AIP Conference Proceedings, Volume 1119, pp. 204-20

Physics

Supernova Remnants, Intersteller Matter, Ultraviolet Astronomical Observations

Scientific paper

Far-ultraviolet (FUV) observation of interstellar absorption toward the Lupus Loop region (SNR 330.0+15.0) is presented. Using Hipparcos, more accurate distance estimates to 52 B-type stars in Lupus are obtained. When a distance of 155+/-8 pc to the supernova remnant is adopted, most stars seem to lie in the foreground. Seven stars lie in the background, allowing a clearer interpretation of absorption lines. Prior to Hipparcos, research suffered from distance uncertainties, leading to confusion as to whether the origin of an observed absorption line was stellar or interstellar. FUV emission studies detected ionic lines inferred to be tracers of warm and hot (104<106° K) interstellar plasma. Important cooling lines (e.g., C IV, O VI, S II, and N IV) from diffuse warm gas have been reported. Assuming that these lines are caused by the same plasma, a detailed absorption analysis is performed toward seven background stars in Lupus. The ionic lines detected in emission are also well detected in absorption, suggesting the existence of warm interstellar gas. These lines seem to be dependent on distance and spectral type, consistent with that of previous works toward other sightlines.

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