Boron Constraints on Slow Mixing in Low Mass Stars

Details Boron Constraints on Slow Mixing in Low Mass Stars Boron Constraints on Slow Mixing in Low Mass Stars

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9048d&link_type=abstract

HST Proposal ID #9048

Physics

Hst Proposal Id #9048 Cold Stars

Scientific paper

The atomic and nuclear characteristics of the light elements Li, Be and B make their photospheric abundances ideal tracers of internal physical processes in stars. Both Li and Be have been heavily utilized to this end since their diminished abundances are a direct result of the extent of internal slow mixing between surface and interior layers, as we have shown with our ground-based data. Boron provides a fresh and special probe because it survives to greater depths inside stars than does Li or Be, and can thus uniquely reveal the depth of mixing. We propose to observe B in stars with very large depletions of Li and Be, i.e. stars which have been the most seriously affected by mixing. Previously, we have found one star in which B might be slightly depleted; new observations are needed to establish whether or not B depletion really occurs in stars, and if yes, how much. Our published detailed stellar models agree remarkably well with the correlated depletion of Li and Be. Similar models imply that the Big Bang ^7Li abundance has been depleted, up to 0.3dex according to ^6Li data. However, such models do not deplete B. It is thus imperative {for improved knowledge of both, stellar interiors and cosmology} to establish whether low mass stars deplete B, and thus the degree to which such models are or are not realistic. In low mass dwarfs, B can only be observed from space, using HST/STIS.

Affiliated with

Also associated with

No associations

Rating

Boron Constraints on Slow Mixing in Low Mass Stars 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 Boron Constraints on Slow Mixing in Low Mass Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boron Constraints on Slow Mixing in Low Mass Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1200427