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

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HAL-CEA
Keywords
  • Interstellar Matter
  • White Dwarfs
  • X-Ray Emission Spectra
  • [Sdu.Astr.Sr] Sciences Of The Universe [Physics]/Astrophysics [Astro-Ph]/Solar And Stellar Astrophys
  • [Phys.Astr.Sr] Physics [Physics]/Astrophysics [Astro-Ph]/Solar And Stellar Astrophysics [Astro-Ph.Sr
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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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