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Multiwavelength Campaign Observations of a Young Solar-type Star, EK Draconis. I. Discovery of Prominence Eruptions Associated with Superflares

  • Authors: Kosuke Namekata, Vladimir S. Airapetian, Pascal Petit, Hiroyuki Maehara, Kai Ikuta, Shun Inoue, Yuta Notsu, Rishi R. Paudel, Zaven Arzoumanian, Antoaneta A. Avramova-Boncheva, Keith Gendreau, Sandra V. Jeffers, Stephen Marsden, Julien Morin, Coralie Neiner, Aline A. Vidotto, Kazunari Shibata

Kosuke Namekata et al 2024 The Astrophysical Journal 961 .

  • Provider: AAS Journals

Caption: Figure 15.

Temporal evolution of the X-ray spectral fitting results for superflares E2 (A) and E3 (B). (a) Light curves of X-ray count rates with a time resolution of 2 minutes in the 0.5–3 keV range. (b) Hardness ratio, which is obtained by dividing the flux in the 0.5–1 keV range by the flux in the 1–3 keV range. (c) Temporal change in temperature, with different colors indicating different time resolutions. (d) Temporal change in the emission measure (EM).

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