Membership and Lithium Abundances in the Young (220 Myr) Open Cluster, NGC 6475

Details Membership and Lithium Abundances in the Young (220 Myr) Open Cluster, NGC 6475 Membership and Lithium Abundances in the Young (220 Myr) Open Cluster, NGC 6475

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop..216j&link_type=abstract

NOAO Proposal ID #2002A-0216

Physics

Scientific paper

Using the Blanco 4m+HYDRA, we propose to obtain intermediate resolution spectra of an optically selected sample of early-G to mid-M photometric members of the young (220 Myr) open cluster NGC 6475, which lies mid-way in age between the Hyades and Pleiades. These spectra will enable us to measure radial velocities and Li equivalent widths (for abundances). Because NGC 6475 lies in the Galactic plane (b=-4.5^o), we estimate that only 30-40 % of the photometric members are bona fide cluster members, the remainder being contaminating field stars. It is essential to obtain a further membership criterion (radial velocities) to establish a solid cluster membership list of genuine members. Furthermore, we will measure lithium equivalent widths (and determine abundances) for the bona fide cluster members. These abundances will allow us to trace the evolution of lithium depletion during the main sequence at intermediate ages, and allow us to examine whether the spread in Pleiades K-star Li abundances converges towards the Hyades, constraining non-standard modes of Li depletion and revealing whether the Hyades Li abundance pattern ever looked like that of the Pleiades. We request two bright nights using the Blanco 4m+HYDRA instrument to measure radial velocities and lithium equivalent widths of some 900-1000 solar-type photometric members of NGC 6475.

Affiliated with

Also associated with

No associations

Rating

Membership and Lithium Abundances in the Young (220 Myr) Open Cluster, NGC 6475 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Membership and Lithium Abundances in the Young (220 Myr) Open Cluster, NGC 6475, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membership and Lithium Abundances in the Young (220 Myr) Open Cluster, NGC 6475 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1113645