Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-10-23
Astronomy and Astrophysics
Astrophysics
32 pages, Latex, to appear in the Astrophysical Journal, April, 1997
Scientific paper
10.1086/303799
With the High Resolution Spectrograph aboard the Hubble Space Telescope we obtained high signal-to-noise (S/N > 200 - 600 per 17 km/s resolution element) spectra of narrow absorption lines toward the Wolf-Rayet star HD 50896. The ring nebula S308 that surrounds this star is thought to be caused by a pressure-driven bubble bounded by circumstellar gas (most likely from a red supergiant or luminous blue variable progenitor) pushed aside by a strong stellar wind. Our observation has shown for the first time that blueshifted (approximately 70 km/s relative to the star) absorption components of C IV and N V arise in a conduction front between the hot interior of the bubble and the cold shell of swept-up material. These lines set limits on models of the conduction front. Nitrogen in the shell appears to be overabundant by a factor ~10. The P Cygni profiles of N V and C IV are variable, possibly due to a suspected binary companion to HD 50896.
Boroson Bram
Buren Dave Van
Chu Y.-H. Y.-H.
Clark Christina Oelfke
Mac Low Mordecai-Mark
No associations
LandOfFree
An Interstellar Conduction Front Within a Wolf-Rayet Ring Nebula Observed with the GHRS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An Interstellar Conduction Front Within a Wolf-Rayet Ring Nebula Observed with the GHRS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Interstellar Conduction Front Within a Wolf-Rayet Ring Nebula Observed with the GHRS will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-281904