Computer Science
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007lyot.confe..31t&link_type=abstract
Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21s
Computer Science
Scientific paper
Over the past two years we have conducted two separate surveys with the Palomar PALAO/PHARO AO+coronagraph system to search for companions around the targets in all three SIM PlanetQuest planet search Key projects. These projects include two surveys to detect terrestrial mass planets around nearby, main-sequence stars (EPIcS, Shao and Marcy - PIs) and one to detect hot Jupiters around young stars in nearby clusters (SIM/YSO, Beichman - PI ). Our SIM/YSO sample consists of 40 stars in the Pleiades and Taurus-Aurigae clusters, while the EPIcS sample consists of 40 stars observable from the Northern Hemisphere. At a distance of 130 and 140 parsecs for the Pleiades and Taurus, we are looking within a range of 50 to 1000 AU with the potential of detecting planets down to 10-20 MJ. While the FGK stars are ten times closer, we reach minimum masses of 20-30 MJ due to their older age. Thus far, we have detected 8 potential companions around 5 stars in the Pleiades and 27 potential companions around 13 stars in Taurus. In the EPIcS sample, we have found two confirmed proper motion companions. Follow up observations, including AO imaging and spectroscopy, will be conducted in the next year to prove whether these sources are true companions. This talk will review the findings of these Palomar surveys, as well as additional high contrast Palomar surveys searching for brown dwarf and planetary companions.
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