OVI in the Local Interstellar Medium: FUSE observations towards B-stars within 200 pc

B.Y. Welsh 1 Rosine Lallement 2
2 HEPPI - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : We present FUSE archival data on the absorption characteristics of the interstellar OVI (1032 Å) line observed towards 17 early-type stars located within 200 pc of the Sun. We have detected OVI absorption along 5 of the 17 sight-lines sampled, all towards stars with distances >80 pc. The average volume density, nOVI, along these sight-lines was found to be 5.2×10−8 cm−3, a value in agreement with previous measurements of OVI in the local ISM. The location of the five sight-line detections places them just within, or just at, the neutral boundary to the Local Cavity
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Submitted on : Thursday, September 10, 2009 - 3:31:13 PM
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B.Y. Welsh, Rosine Lallement. OVI in the Local Interstellar Medium: FUSE observations towards B-stars within 200 pc. The Local Bubble and Beyond II: Proceedings of the International Conference, AIP Conference Proceedings, Vol. 1156, Apr 2008, Philadelphia (Pennsylvania), United States. pp.125-129, ⟨10.1063/1.3211804⟩. ⟨hal-00415431⟩

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