Other
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21441116t&link_type=abstract
American Astronomical Society, AAS Meeting #214, #411.16; Bulletin of the American Astronomical Society, Vol. 41, p.678
Other
Scientific paper
The exoplanet task force report emphasized M dwarfs as high priority targets for future planet finding efforts due to their large RV and astrometric signature and dominance in the local stellar population. Indeed, some of the least massive planets have been detected around M dwarfs and its only a matter of time before a bona fide terrestrial mass planet is detected around an M dwarf through more precise RV measurements (0.1 cm/s) or M dwarf specific transit surveys. Here, we present some results from our SIM Science Study to determine the effect of intrinsic stellar jitter on our ability to detect terrestrial planets around low-mass stars with μas astrometry. The study has two primary goals: 1) To assess the astrophysical limits of ultra-precision astrometric measurements of M-dwarfs compared to those of other detection methods and 2) To assess the scientific impact of an M-dwarf SIM GO survey to look for terrestrial planets. To achieve these goals, we have completed the task of designing a SIM GO target sample that considered the strengths and weaknesses of making optical astrometric measurements of M dwarfs. In the future we will determine the effect of difference sources of intrinsic jitter (i.e. sunspots, granulation, flares) on astrometric and radial velocity measurements through realistic jitter models and high precision photometry, estimate the expected yield of the GO program through Monte Carlo models that utilize the info gained from the jitter models, and compare these results to a reasonably designed radial velocity survey of the same targets.
Catanzarite Joe
Law Nicholas
Plavchan Peter
Tanner Angelle M.
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