Chromospheric activity from AMBRE-HARPS : J/A+A/646/A77


Authors : Gomes da Silva J. orcid , Santos N.C., Adibekyan V. (hide) , Santos N.C., Adibekyan V. et..al

Bibcode : 2021A&A...646A..77G (ADS) (Simbad) (Objects) (hide)

CDS Keywords : Stars, late-type; Effective temperatures; Abundances; Stars, masses; Stars, ages
UAT : Late-type stars, Effective temperature, Chemical abundances, Stellar masses, Stellar ages

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Inserted into VizieR : 10-Feb-2021
Last modification : 10-Sep-2021

Stellar chromospheric activity of 1,674 FGK stars from the AMBRE-HARPS sample. I. A catalogue of homogeneous chromospheric activity. (2021)

Keywords : catalogs - stars activity

Abstract:The main objective of this project is to characterise chromospheric activity of FGK stars from the HARPS archive. We start, in this first paper, by presenting a catalogue of homogeneous determined chromospheric emission (CE), stellar atmospheric parameters and ages for 1,674 FGK main sequence (MS), subgiant, and giant stars. The analysis of CE level and variability is also performed. We measured CE in the CaII lines using more than 180000 high-resolution spectra from the HARPS spectrograph, as compiled in the AMBRE project, obtained between 2003 and 2019. We converted the fluxes to bolometric and photospheric corrected chromospheric emission ...(more)
Abstract: (hide)
We present a catalogue of 1674 FGK MS, subgiant, and giant stars with more than 180 000 observations from the HARPS archive taken between 2003 and 2019. The vast majority of the stars are in the solar neighbourhood at less than 100pc away. The catalogue has a maximum time-span of ~15.5 years. We have 428 stars with an observation time-span longer than 10 years, 178 of them with more than 50 individual nights of observation. These stars with long time-spans (and therefore high-accuracy median activity levels) constitute a prime sample with which to study stellar rotation, cycles, and evolution. These time series will be reported in the following papers of this series.
Joao Silva, Joao.Silva(at)astro.up.pt

                
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