Other
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9804d&link_type=abstract
HST Proposal ID #9804
Other
Hst Proposal Id #9804 Cool Stars
Scientific paper
The light elements Li, Be, and B are formed in the Big Bang {Li} and by Cosmic Ray {CR} spallation. But the abudance of 11B has never been satisfactorily explained: 11B/10B in the solar system is 4.0, CR spallation predicts 2.5. There needs to be another source of 11B. Woosely et al. {1990} predict the large flux of neutrinos in Type II supernovae will sythesize elements, including converting 12C to 11B. This "neutrino process" has never been experimentally verified. A "smoking gun" would be to find a metal poor star whose elements came primarily from Type II SN and whose B is pure 11B - only the neutrino process could produce that. In a previous cycle we obtained STIS measurements of a metal poor star and were able to clearly show that 11B/10B <= 4. We now ask for additional observations of higher S/N, which can distinguish if 11B/10B = 4, or if the mix is pure 11B. In either case we will end up with a precise measure of how much 11B in old stars is NOT produced by CRs, and likely due to SN, and can place a new constraint on the temperature and density of SN models in the region where neutrino-induced nucleosynthesis is thought to take place. Although this test could be made in a single star, we ask to observe two, to increase the confidence in what is a subtle isotopic measurement. We propose to observe the brightest two suitable metal poor stars. One is in the CVZ.
No associations
LandOfFree
Experimental Proof of the Neutrino Process in SN from Boron Isotope Measurements 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 Experimental Proof of the Neutrino Process in SN from Boron Isotope Measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Experimental Proof of the Neutrino Process in SN from Boron Isotope Measurements will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1733136