Physics
Scientific paper
Sep 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2318c&link_type=abstract
Chandra Proposal ID #09100452
Physics
Chandra Proposal Id #09100452
Scientific paper
We proposal a 50 ksec ACIS-S observation of the brightest known comet available during Chandra Cycle 9, 8P/Tuttle (2008). The comet will have close passage by the Earth in January 2008, with minimum Earth-comet distance of 0.25 AU and maximum visual brightness V~5.9. We will: search for changes in the spectra as a function of distance from the comet's nucleus and spectral changes across the x-ray bow shock; 2) investigate the spectral changes as a function of changes in the Solar Wind (such as, composition, velocity, and type) by comparing our results with real time solar wind monitors on board ACE, SOHO and STEREO; and 3) test the latest self-consistent physics-based charge exchange models model against the ACIS-S spectra and derive minor ion abundances.
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