High-Resolution Spectroscopy of Some Very Active Southern Stars | Zendy

David R. Soderblom | Zendy; Jeremy R. King | Zendy; Todd J. Henry | Zendy

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High-Resolution Spectroscopy of Some Very Active Southern Stars

Author(s) -

David R. Soderblom,

Jeremy R. King,

Todd J. Henry

Publication year - 1998

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/300423

Subject(s) - spectroscopy , stars , resolution (logic) , astrophysics , physics , astronomy , high resolution , materials science , geology , remote sensing , computer science , artificial intelligence

We have obtained high-resolution echelle spectra of 18 solar-type stars thatan earlier survey showed to have very high levels of Ca II H and K emission.Most of these stars belong to close binary systems, but 5 remain as probablesingle stars or well-separated binaries that are younger than the Pleiades onthe basis of their lithium abundances and H-alpha emission. Three of theseprobable single stars also lie more than 1 magnitude above the main sequence ina color-magnitude diagram, and appear to have ages of 10 to 15 Myr. Two ofthem, HD 202917 and HD 222259, also appear to have a kinematical associationwith the pre-main sequence multiple system HD 98800.Comment: 25 figures, 3 table

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