Micro-arcsecond astrometry of exoplanet host stars with GRAVITY instrument

Details Micro-arcsecond astrometry of exoplanet host stars with GRAVITY instrument Micro-arcsecond astrometry of exoplanet host stars with GRAVITY instrument

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010lyot.confe..55k&link_type=abstract

Proceedings of the conference In the Spirit of Lyot 2010: Direct Detection of Exoplanets and Circumstellar Disks. October 25 -

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The 2nd generation Very Large Telescope Interferometer instrument GRAVITY aims at achieving micro-arcsecond accuracy astrometry. In a study of the GRAVITY science cases we investigate the astrometric detection of exoplanets around very low mass stars and closure phase variations during transits . This includes sample selection of M-dwarfs to be surveyed and simulations to identify the "best" survey strategy. With GRAVITY astrometric capability of 10 microarcsec, we expect to detect planets with 4 earth masses in 5 years survey.

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