[Previous] | [Session 41] | [Next]
B.Y. Welsh (SSL, UC Berkeley), R. Lallement (CNRS, France), S. Sallmen (U of Wisc, La-Crosse)
We present preliminary UV absorption spectra of 2 nearby stars (HD 128345 and HD 127381) recorded with the the HST-STIS instrument. Both stars lie in a similar galactic sight-line through the local interstellar medium, with the former star located within the neutral boundary to the Local Bubble at a distance of 95pc, the latter star being ouside of the local cavity at 175pc.
We find no evidence of highly ionized and hot (T ~ 100,000K) gas residing within the Local Bubble. However, the high ions of CIV and SiIV are seen in absorption in the spectra of HD 127381, suggesting that they are formed at a conductive interface at the neutral boundary to the local cavity.
The author(s) of this abstract have provided an email address for comments about the abstract: bwelsh@ssl.berkeley.edu
[Previous] | [Session 41] | [Next]
Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.