New Rotation Periods in the Pleiades: Interpreting Activity Indicators

Details New Rotation Periods in the Pleiades: Interpreting Activity Indicators New Rotation Periods in the Pleiades: Interpreting Activity Indicators

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.8014k&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #80.14; Bulletin of the American Astronomical Society, Vol. 29, p.1340

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results of photometric monitoring campaigns of G, K and M dwarfs in the Pleiades carried out in 1994, 1995 and 1996. We have determined rotation periods for 18 stars in this cluster. We examine the validity of using observables such as X-ray activity and amplitude of photometric variations as indicators of angular momentum loss. We report the discovery of cool, slow rotators with high amplitudes of variation. This contradicts previous conclusions about the use of amplitudes as an alternate diagnostic of the saturation of angular momentum loss. We show that the X-ray data can be observational indicators of mass-dependent saturation in the angular momentum loss proposed on theoretical grounds.

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