Other
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50771p&link_type=abstract
Spitzer Proposal ID #50771
Other
Scientific paper
We wish to complete an unbiased volume-limited survey of nearby A star systems, using MIPS to search for warm debris disks around the remaining 49 such systems within 45pc not observed by Spitzer. This will almost double the number of A-type systems observed by Spitzer in this volume. The dust mass limit will be a few x 1e-4 Earth masses, limited only by the photospheric emission and calibration accuracy. This would form the first complete and systematic survey for debris around the nearest ~100 A stars. It would complement similar surveys of FGK stars being carried out with Spitzer. The targets are to be observed by a complementary sub-millimeter survey (mainly using SCUBA-2), and together these data will be used to search for debris dust over a very wide temperature range (20-400K). Moreover the results will be used to determine the dust temperature, and hence place estimates on the size of emitting region. The results will form a valuable legacy from Spitzer. Not only will they help to understand how and why debris is found in such systems (by correlating the presence of dust with other system parameters), but they will form a superb target list for followup imaging with high spatial resolution facilities in the future.
Dent Bill
Greaves Jane
Holland Wayne
Matthews Brenda
Phillips Neil
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