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Session:
Structure of Stellar Winds
Presentation Number:
101.05
Title:
High Resolution Radio Observations of the Nebulae of Luminous Blue Variable Stars
Presentation Start:
1/8/2007 9:20:00 AM
Presentation End:
1/8/2007 6:30:00 PM
Category:
05. Stellar Atmospheres, Evolved Stars and Winds
Authors:
Allison Mercer1, M. Chizek1, C. C. Lang1, D. F. Figer2, P. Najarro3
1Univ. of Iowa, 2Rochester Institute of Technology, 3CSIC, Spain.
Abstract:
Luminous Blue Variable (LBV) stars represent an important, but short-lived, evolutionary phase of massive stars marked by extreme mass-loss events. The ejecta from these events appear as associated LBV nebulae (LBVN). Radio observations of the LBVN can provide insight into previous and current mass loss rates of the star, as well as the details of expansion into the surrounding ISM. Here, we report new multi-frequency, multi-configuration Very Large Array (VLA) observations of seven Galactic LBVN. We present preliminary 8.5 and 22.5 GHz results on LBVN sources AFGL2298, NaSt1, G79.29+0.46, G26.47+0.02, the Galactic Center Pistol Star, Galactic Center FMM362 and LBV 1806-20. These high-resolution observations reveal structure in the LBVN.
 
 
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