TY - JOUR

T1 - Magnetism in cool evolved stars

T2 - The M giants EK bootis and β pegasi

AU - Georgiev, S.

AU - Konstantinova-Antova, R.

AU - Lèbre, A.

AU - Aurière, M.

AU - Charbonnel, C.

AU - Palacios, A.

AU - Drake, N.

AU - Bogdanovski, R.

N1 - Publisher Copyright: © 2020, Institute of Astronomy and Rozhen NAO. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/7

Y1 - 2020/7

N2 - Wepresentalong-termspectropolarimetricstudyoftheactiveMgiantsEKBoo-tis (M5III) and β Pegasi (M2.5II-III). For each star, the variability of the disk-averaged longitudinal component of the magnetic field (Bl) is shown, along with the behavior of different spectral activity indicators. The possible nature of the secondary component of EK Boo is discussed. We compare the observed variations in the activity proxies of each of the two giants and discuss possible physical explanations for the structure of their respective magnetic fields. For both objects, observations in linear polarisation are also presented and briefly discussed.

AB - Wepresentalong-termspectropolarimetricstudyoftheactiveMgiantsEKBoo-tis (M5III) and β Pegasi (M2.5II-III). For each star, the variability of the disk-averaged longitudinal component of the magnetic field (Bl) is shown, along with the behavior of different spectral activity indicators. The possible nature of the secondary component of EK Boo is discussed. We compare the observed variations in the activity proxies of each of the two giants and discuss possible physical explanations for the structure of their respective magnetic fields. For both objects, observations in linear polarisation are also presented and briefly discussed.

UR - http://www.scopus.com/inward/record.url?scp=85085887741&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85085887741

VL - 33

SP - 87

EP - 98

JO - Bulgarian Astronomical Journal

JF - Bulgarian Astronomical Journal

SN - 1313-2709

ER -