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2021RNAAS...5....8Z - Research Notes of the AAS, 5, 8 (2021/January-0)

Evidence of Increased Macroturbulence for Betelgeuse during Great Dimming.

ZACS L. and PUKITIS K.

Abstract (from CDS):

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, νmacro ≳ 23 km s–1. The best fit for TiO bands was found for the MARCS model atmosphere with Teff = 3500 K.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): M supergiant stars - Stellar atmospheres - Stellar properties - High resolution spectroscopy

Simbad objects: 1

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