Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21741502n&link_type=abstract
American Astronomical Society, AAS Meeting #217, #415.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
I reflect on the prospects for detecting Earth-like, habitable planets from the ground by targeting nearby M dwarf stars. I present two design studies for ground-based transit surveys seeking habitable, Earth-like planets. The MEarth Observatory, which recently discovered the 6.5 Earth mass GJ 1214b, was largely shaped by the conclusions of the first design study and may evolve according to recommendations from the second.
I also discuss the use of space-based observatories to characterize transiting exoplanets. I present a Spitzer 8 micron study of the intriguingly dense planet HD 149026b. I also present Hubble FGS observations of the e=0.67 exoplanet HD 17156b. These observations were part of a major Hubble program to detect oscillation modes in the star HD 17156. By combining constraints from asteroseismology and transit photometry, I improve the determination of planetary properties by an order of magnitude versus previous studies.
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