Analysis of the chromosphere and corona of low-activity early-M dwarfs
Date Issued
2020
Author(s)
Abstract
While most of the exoplanets have been found orbiting around solar-type stars, low-mass stars have recently been recognized as ideal exo-life laboratory. Currently, stellar activity is one of the limiting factors for the characterization of Earth-twins and for assessing their habitability: understanding the activity of M dwarfs is thus crucial. In this contribution I present the spectroscopic analysis of the quiet early-M dwarfs monitored within the HADES (HArps-n red Dwarf Exoplanet Survey) radial velocity survey. The spectra allow us to analyze simultaneously the Ca ii H&K doublet and the Hydrogen Balmer series, while the intensive follow up gives us a large number of spectra ( 100) for each target. We complement this dataset with ground-based follow-up photometry and archival X-ray data. I present our results on the activity-rotation-stellar parameters and flux-flux relationships, and discuss the correlation of emission fluxes at low activity levels and the evolution timescales of active regions.
Coverage
Solar and Stellar Magnetic Fields: Origins and Manifestations
All editors
Kosovichev, A., Strassmeier, K., Jardine, M.
Volume
354
Start page
355
Conferenece
Solar and Stellar Magnetic Fields: Origins and Manifestations
Conferenece place
Copiapo, Chile
Conferenece date
30 June-6 July, 2019
Issn Identifier
1743-9213
Ads BibCode
2020IAUS..354..355S
Rights
open.access
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