Spectroscopic and photometric analysis of 21 chromospherically active variables: activity cycles and differential rotation

We investigate magnetic activity properties of 21 stars via medium resolution optical spectra and long-term photometry. Applying synthetic spectrum fitting method, we find that all targets are cool giant or sub-giant stars possessing overall [M/H] abundances between \(0\) and \(-0.5\). We find that...

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Veröffentlicht in:	arXiv.org 2021-04
1. Verfasser:	Özdarcan, Orkun
Format:	Artikel
Sprache:	eng
Schlagworte:	Brightness Differential rotation Giant stars Magnetic properties Main sequence stars Optical properties Photometry Physics - Solar and Stellar Astrophysics Shear Subgiant stars Sunspot cycle Sunspots
Online-Zugang:	Volltext
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