2024
DOI: 10.1051/0004-6361/202451697
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Coronal and chromospheric activity of Teegarden’s star

B. Fuhrmeister,
J. H. M. M. Schmitt,
A. Reiners
et al.

Abstract: Teegarden's star is a late-type M-dwarf planet host, typically showing only rather low levels of activity. In this paper we present an extensive characterisation of this activity at photospheric, chromospheric, and coronal levels. We specifically investigated TESS observations of Teegarden's star, which showed two very large flares with an estimated flare fluence between 1029 and 1032\,erg comparable to the largest solar flares. We furthermore analysed nearly 300 CARMENES spectra and 11 ESPRESSO spectra coveri… Show more

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