Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-06-15
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
5 pages, 5 figures, accepted by A&A Letters
Scientific paper
Luminous Blue Variables (LBVs) oftentimes show double-troughed absorption in their strong Halpha lines, which are as yet not understood. Intriguingly, the feature has also been seen in the interacting supernova SN 2005gj, which was for this reason suggested to have an LBV progenitor. Our aims are to understand the double-troughed absorption feature in LBVs and investigate whether this phenomenon is related to wind variability. To this purpose, we perform time-dependent radiative transfer modeling using CMFGEN. We find that abrupt changes in the wind-terminal velocity - as expected from the bi-stability jump - are required to explain the double-troughed absorption profiles in LBVs. This strengthens scenarios that discuss the link between LBVs and SNe utilizing the progenitor's wind variability resulting from the bi-stability jump. We also discuss why the presence of double-troughed P-Cygni components may become an efficient tool to detect extra-galactic LBVs and how to analyze their mass-loss history on the basis of just one single epoch of spectral observations.
Groh Jose H.
Vink Jorick S.
No associations
LandOfFree
The bi-stability jump as the origin for multiple P-Cygni absorption components in Luminous Blue Variables 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 The bi-stability jump as the origin for multiple P-Cygni absorption components in Luminous Blue Variables, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The bi-stability jump as the origin for multiple P-Cygni absorption components in Luminous Blue Variables will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-659138