UVMag: stellar formation, evolution, structure and environment with space UV and visible spectropolarimetry

摘要: Important insights into the formation, structure, evolution and environment of all types stars can be obtained through measurement their winds possible magnetospheres. However, this has hardly been done up to now mainly because lack UV instrumentation available for long periods time. To reach aim, we have designed UVMag, an M-size space mission equipped with a high-resolution spectropolarimeter working in visible spectral range. The domain is crucial stellar physics as it very rich atomic molecular lines contains most flux hot stars. Moreover, covering domains at same time will allow us study star its simultaneously. Adding polarimetric power spectrograph multiply tenfold capabilities extracting information on magnetospheres, winds, disks, magnetic fields. Examples science objectives that reached UVMag are presented pre-main sequence, main sequence evolved They cast new light onto by addressing many exciting important questions. currently undergoing Research & Technology proposed forthcoming ESA call missions. This could also installed large observatory (e.g. NASA's LUVOIR project) within suite instruments.