Lithium abundance in cluster giants - Constraints on meridional circulation transport on the main sequence

Details Lithium abundance in cluster giants - Constraints on meridional circulation transport on the main sequence Lithium abundance in cluster giants - Constraints on meridional circulation transport on the main sequence

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..821c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. 821-834. Research supported by NSERC and Ministere d

Astronomy and Astrophysics

Astrophysics

20

Giant Stars, Lithium, Main Sequence Stars, Meridional Flow, Open Clusters, Angular Momentum, Carbon 13, Pre-Main Sequence Stars, Stellar Atmospheres, Stellar Envelopes, Stellar Evolution, Stellar Models, Stellar Rotation

Scientific paper

The observed Li abundances in giants are used here to constrain meridional circulation transport on the main sequence. It is shown how meridional circulation, operating over the main-sequence lifetime, can lead to Li depletion in the upper radiative envelope and eventually to extreme Li underabundance in first-ascent giants, following convective dilution on the lower giant branch. In the mass range 1.2-2.0 solar, stars with equatorial rotational velocities greater than 30-35 km/s on the ZAMS should destroy most of their Li. These result are compared to recent Li abundance determination in three moderately old clusters, NGC 7789, NGC 752, and M67. Reasonably good agreement is found with data on M67 and NGC 752, but surprising disagreement with data on NGC 7789 is found. Possible explanations are considered.

Affiliated with

Also associated with

No associations

Rating

Lithium abundance in cluster giants - Constraints on meridional circulation transport on the main sequence 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 Lithium abundance in cluster giants - Constraints on meridional circulation transport on the main sequence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium abundance in cluster giants - Constraints on meridional circulation transport on the main sequence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1567006