Lithium and chromospheric activity in the Alpha Persei cluster

Details Lithium and chromospheric activity in the Alpha Persei cluster Lithium and chromospheric activity in the Alpha Persei cluster

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..229s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 1, p. 229-235.

Other

20

Chromosphere, Interstellar Extinction, Lithium, Open Clusters, Spectral Resolution, Stellar Mass, Abundance, Dwarf Stars, High Resolution, Radial Velocity

Scientific paper

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.

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