Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/LubowichtagA2493tp.pdf Дата изменения: Wed Apr 1 19:23:20 2009 Дата индексирования: Tue Nov 24 13:34:26 2009 Кодировка: Поисковые слова: cosmic rays

Proposal Identification No.:

A2493

Date Received:

2009-Mar-09 14:20:57

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 60 hours Hours 30 min

Observations of Li and BI: A Test Supernova Nucleosynthesis Models

The abundances of lithium and boron provide important information about big-bang nucleosynthesis, Galactic chemical evolution, stellar evolution, cosmic-ray spallation reactions, and supernova processes. We propose an observational test the neutrino nucleosynthesis process in supernovae. We propose to observe the ground state radio frequency hyperfine-transitions of BI and Li I (at 732 MHz and 803 MHz) in the shocked molecular cloud associated with the IC443 SNR. Our observations will test supernova nucleosynthesis models that predict that a significant fraction of interstellar Li and B comes from neutrino induced spallation reactions in He and C shells of SN. We expect to detect Li and B because their localized abundances are predicted to be enhanced by 1000 - 10,000 times compared to their ISM abundances. Their ISM abundances are the result of different nucleosynthesis process plus mixing and dilution. However, even a negative result is important as it constrains SN nucleosynthesis models.

Name Donald Lubowich

Institution Hofstra University

E-mail donald.lubowich@hofstra.edu

Phone 516-921-320

Student no

Remote Observing Request

Observer will travel to AO X Remote Observing In Absentia (instructions to operator)

Instrument Setup
705-825 Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
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Frequency Ranges Planned
732.153 803.504

2