SUMMARY OF PROPOSAL 81252
OSAKA JAPAN 560-0043
Medium: CD ROM
Hard tail variability in early-type star
ABSTRACTSo far early type stars have been believed to have no magnetic field,and the X-rays come from the stellar wind. Recently, some objections to this standard understanding have been reported; detection of X-ray hard tails with power law shape ; evidence of the plasma ejection from the stellar surface ; a large scale optical depth variation originated on the stellar surface. From these observational context, we suppose that the X-ray hard tail comes from a magnetically confined hot plasma on the stellar surface, hence the X-ray hard tail must be variable. In order to examine this possibility, we propose a long term observation of a bright B0 star, tau Sco.
|CO-I NAME ||INSTITUTE ||COUNTRY |
|TARGET NAME||PRI||RA||DEC||TIME||TC||OFF||GIS||SIS CNT||OBS|
|1)tau Sco|| A||248.8960||-28.2686|| 80 ks||Y||N||P||4|