Chromospheric Ca ii Emission in Nearby F, G, K, and M Stars
The Astrophysical Journal Supplement Series2004Vol. 152(2), pp. 261–295
Citations Over TimeTop 1% of 2004 papers
Abstract
We present chromospheric CaII activity measurements, rotation periods and ages for ~1200 F-, G-, K-, and M- type main-sequence stars from ~18,000 archival spectra taken at Keck and Lick Observatories as a part of the California and Carnegie Planet Search Project. We have calibrated our chromospheric S values against the Mount Wilson chromospheric activity data. From these measurements we have calculated median activity levels and derived R'HK, stellar ages, and rotation periods for 1228 stars, ~1000 of which have no previously published S values. We also present precise time series of activity measurements for these stars.
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