1997/11/24 by Anita Krishnamurthi, D. M. Terndrup, Marc H. Pinsonneault +20 · 2 citations
Engineering · Mathematics · Physics and Astronomy · #Amplitude #Angular momentum #Astro and Planetary Science #Astronomical Observations and Instrumentation #Astronomy #Astrophysics #Classical mechanics #Geometry #Mathematics #Observable #Optics #Physics #Pleiades #Rotation (mathematics) #Rotation period #Saturation (graph theory) #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/305173
24 pages, LaTex (AASTeX); includes 8 postscript figures and 4 Latex tables. To appear in ApJ, Feb. 1, 1998. Postscript version of preprint can be obtained from http://casa.colorado.edu/~anitak/pubs.html
arxiv created 1997/11/24 · openalex publication_date 1998/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present results of photometric monitoring campaigns of G, K, and M dwarfs in the Pleiades carried out in 1994-1996. We have determined rotation periods for 18 stars in this cluster. In this paper we examine the validity of using observables such as X-ray activity and the 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 used as observational indicators of mass-dependent saturation in the angular momentum loss proposed on theoretical grounds.