VLBI Astrometry for Detection of Planets Orbiting Radio-emitting Stars

Details VLBI Astrometry for Detection of Planets Orbiting Radio-emitting Stars VLBI Astrometry for Detection of Planets Orbiting Radio-emitting Stars

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.7007l&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #70.07; Bulletin of the American Astronomical Society, Vol. 27, p.1380

Astronomy and Astrophysics

Astronomy

Scientific paper

The precison of Very Long Baseline Interferometry (VLBI) astrometry of the 11 radio-emitting stars observed for the Hipparcos mission is better than 1 milliarcsecond, in general, and reaches 0.2 milliarcsecond for the best result on the star sigma (2) CrB at 22 parsecs and observed regularly for 7 years now. This level of precision is comparable to the wobble expected if a 1 Jupiter mass planet orbits this star. We shall present these results and discuss the improvements of the technique to reach the S/N limited astrometric precision of 10 microarcseconds providing a mean to detect a Jupiter mass planet at the 20-sigma level, i.e. yielding directly the planet mass, not its mass times sini, with a precision of 5%.

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