Portal de Periódicos da CAPES

Lithium and chromospheric activity in the Alpha Persei cluster

1993; Institute of Physics; Volume: 106; Linguagem: Inglês

10.1086/116630

1538-3881

J. R. Stauffer, Charles F. Prosser, M. S. Giampapa, Mark S. Soderblom, Theodore Simon,

Chromosomal and Genetic Variations

We have obtained high resolution spectra of a set of proposed members of the Alpha Persei open cluster which had previously been shown to have anomalously low lithium abundances. We have used the new spectra to derive Ca II emission strengths, radial velocities, and reddening estimates in order to assess whether these stars truly are members of the Alpha Per cluster. We conclude that most of the weak lithium stars are indeed bonafide cluster members, and thus the problem of explaining their anomalous lithium abundances remains. We have also obtained spectra for another sample of stars for which the previous membership data were relatively limited. Most of these stars do not appear to be members of the cluster.