Stellar Physics with High-Resolution UV Spectropolarimetry
Abstract
Current burning issues in stellar physics, for both hot and cool stars, concern their magnetism. In hot stars, stable magnetic fields of fossil origin impact their stellar structure and circumstellar environment, with a likely major role in stellar evolution. However, this role is complex and thus poorly understood as of today. It needs to be quantified with high-resolution UV spectropolarimetric measurements. In cool stars, UV spectropolarimetry would provide access to the structure and magnetic field of the very dynamic upper stellar atmosphere, providing key data for new progress to be made on the role of magnetic fields in heating the upper atmospheres, launching stellar winds, and more generally in the interaction of cool stars with their environment (circumstellar disk, planets) along their whole evolution. UV spectropolarimetry is proposed on missions of various sizes and scopes, from POLLUX on the 15-m telescope LUVOIR to the Arago M-size mission dedicated to UV spectropolarimetry.
Cite
@article{arxiv.1908.01545,
title = {Stellar Physics with High-Resolution UV Spectropolarimetry},
author = {Julien Morin and Jean-Claude Bouret and Coralie Neiner and Conny Aerts and Stefano Bagnulo and Claude Catala and Corinne Charbonnel and Chris Evans and Luca Fossati and Miriam Garcia and Ana I Gómez de Castro and Artemio Herrero and Gaitee Hussain and Lex Kaper and Oleg Kochukhov and Renada Konstantinova-Antova and Alex de Koter and Michaela Kraus and Jiří\K{r}tička and Agnes Lèbre and Theresa Lueftinger and Georges Meynet and Pascal Petit and Steve Shore and Sami Solanki and Beate Stelzer and Antoine Strugarek and Aline Vidotto and Jorick S Vink},
journal= {arXiv preprint arXiv:1908.01545},
year = {2019}
}
Comments
25 pages, 11 figures, white paper submitted to ESA Voyage 2050 call