Rotation and activity among solar-type stars of the Ursa Major Group
1993; IOP Publishing; Volume: 402; Linguagem: Inglês
10.1086/186686
ISSN1538-4357
Autores Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (51) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Rotation and Activity among Solar-Type Stars of the Ursa Major Group Soderblom, David R. ; Mayor, Michel Abstract We examine rotation and chromospheric activity among G and K dwarfs recently shown to be members of the Ursa Major Group (UMaG). Rotation periods for UMaG stars are smaller than for stars of the same colors in the Hyades, and by an amount corresponding to the Skumanich relation. Most UMaG stars have about the same level of Ca II and K emission, implying that they also have nearly uniform intrinsic rotation rates. That means that the diversity of rotation rates and levels of activity seen among solar-type stars in the Alpha Persei and Pleiades clusters has largely converged by the age of UMaG (0.3 Gyr). Publication: The Astrophysical Journal Pub Date: January 1993 DOI: 10.1086/186686 Bibcode: 1993ApJ...402L...5S Keywords: Dwarf Stars; G Stars; K Stars; Star Clusters; Stellar Activity; Stellar Rotation; Chromosphere; Emission Spectra; Spaceborne Astronomy; Stellar Atmospheres; Stellar Evolution; Astrophysics full text sources ADS | data products SIMBAD (18) Related Materials (6) Part 1: 1982ApJ...263..239S Part 2: 1983ApJS...53....1S Part 3: 1983ApJ...269..250V Part 4: 1993ApJS...85..315S Part 6: 1998Ap&SS.261...59S Part 7: 2001ApJ...563..334S
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