The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk

Details The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8770b&link_type=abstract

HST Proposal ID #8770

Physics

Hst Proposal Id #8770

Scientific paper

In spite of several HST cycles of boron abundance determinations, we do not know the true, ambient, present-day abundance of B. Only two stars {with undepleted Li and Be} have been observed to derive the Population I true B abundance. Past cycles have focused on {1} halo stars with low metallicity and {2} solar-type stars with Li and/or Be deficiencies. In this study we wish to determine stellar abundances of boron, measured from the B I 2497 Angstrom line from STIS echelle spectra, of main sequence F-G stars that have retained their full initial abundances of boron. Our target stars are those for which ground-based observations show that beryllium is undepleted. These new abundances will map evolution of the boron abundance in the Galactic disk in the metallicity range from one-third solar up to solar. Then the B, and previously determined Li and Be abundances, will be used to improve understanding of the nucleosynthesis of B. In particular, we will be able to assess the relative contributions from cosmic ray-induced spallation vs neutrino-induced spallation in Type II SN, that are predicted to synthesize B {as ^11B} but not Be. Since the former process is the only identified site of Be synthesis, the B/Be ratio can be used to resolve the contributions of neutrino and cosmic ray induced spallation.

Affiliated with

Also associated with

No associations

Rating

The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk 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 The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1720480