Atmosphere of Betelgeuse before and during the Great Dimming event revealed by tomography

  title={Atmosphere of Betelgeuse before and during the Great Dimming event revealed by tomography},
  author={K. Kravchenko and A. Jorissen and S. Eck and T. Merle and A. Chiavassa and C. Paladini and B. Freytag and B. Plez and M. Montarg{\`e}s and H. Winckel},
Context. Despite being the best studied red supergiant star in our Galaxy, the physics behind the photometric variability and mass loss of Betelgeuse is poorly understood. Moreover, recently the star has experienced an unusual fading with its visual magnitude reaching a historical minimum. The nature of this event was investigated by several studies where mechanisms, such as episodic mass loss and the presence of dark spots in the photosphere, were invoked. Aims. We aim to relate the… Expand


Astrophysics of Red Supergiants (IOP Publishing
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Properties of hysteresis loops of Betelgeuse from the present paper and Gray (2008). mask RV range (RVmin
  • 2008
tronomer’s Telegram, 13512
  • AJ, 154,
  • 2020
Same as Fig. B.3, but for time range between JD 2 458 372.7 (September 11, 2018) and JD
  • 2019
Mass loss [M yr−1
  • Le Bertre et al
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Top panel: CCFs in mask C1 corresponding to the linedoubling phases of Cycles 2 (black line; 2017-02-08), 3 (blue lines; 2018-02-22
  • (orange lines; 2019-01-11,
  • 2019
Observations from the AAVSO International Database
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Same as Fig. B.3, but for the time range between JD 2 457 659.8 (September 28, 2016) and JD 2 457 766.4 (January 12, 2017)
  • Article number,
  • 2017
Date (yy-mm-dd) TiO temperature