The Variability of Stars--Supernovae Precursors
Volume 35 number 1 (2007)
- O. A. Tsiopa
Abstract
Many types of stellar variability are connected with mass-loss processes. Strong variable winds ejected by supernova precursors are revealed in early supernova spectra, radio, and X-rays. The geometry of the circumstellar shells around the exploding stars is surprisingly regular at different scales. The formation of shells is a universal process for colliding winds in a series of astrophysical objects, and is detected as a quasi-periodic variability.