Open AccessEvidence of Increased Macroturbulence for Betelgeuse during Great Dimming
Author(s) -
L. Začs,
Kārlis Puķı̄tis
Publication year - 2021
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/abdaac
Subject(s) - atmosphere (unit) , spectral line , astrophysics , physics , astronomy , meteorology
We compared high-resolution spectra of Betelgeuse observed before and during the Great Dimming. Atomic lines are shallow and broad during the Great Dimming presumably because of molecular veiling and increased macroturbulence, ν macro ≳ 23 km s −1 . The best fit for TiO bands was found for the MARCS model atmosphere with T eff = 3500 K.