Rotational velocities of low-mass stars in the Hyades

Details Rotational velocities of low-mass stars in the Hyades Rotational velocities of low-mass stars in the Hyades

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320l..51s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 320, Sept. 1, 1987, p. L51-L55.

Astronomy and Astrophysics

Astrophysics

58

Dwarf Stars, Late Stars, Stellar Mass, Stellar Rotation, G Stars, High Resolution, K Stars, Stellar Spectra

Scientific paper

The authors have used high-resolution echelle spectra to estimate rotational velocities for K and M dwarfs in the Hyades. All of the K dwarfs have rotational velocities less than the instrumental limit of 10 km s-1. Most of the M dwarfs with (R-I)K > 1.0 have detectable rotational velocities, with 10 < v sin i < 20 km s-1. Combining these data with results from the younger Pleiades and α Persei clusters, the authors find that G dwarfs spin down from ≡100 km s-1 to ≡10 km s-1 in less than 4×107yr, whereas M dwarfs take an order of magnitude longer to spin down.

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