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A Mass for the Extrasolar Planet Gl 876b Determined from Hubble Space Telescope Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities
G. F. Benedict, B. E. McArthur, T. Forveille +9
We report the first astrometrically determined mass of an extrasolar planet, a companion previously detected by Doppler spectroscopy. Radial velocities first provided an ephemeris…
Oscillations in alpha Cen A observed with UCLES at the AAT
T. R. Bedding, R. P. Butler, C. McCarthy +5
We report Doppler measurements of alpha Cen A from time-series spectroscopy made with UCLES at the 3.9-m AAT. Wavelength calibration using an iodine absorption cell produced high-p…
The Statistics of Extrasolar Planets: Results from the Keck Survey
Andrew Cumming, Geoffrey W. Marcy, R. Paul Butler +1
We present an analysis of precision radial velocity measurements for 580 stars from the Keck survey. We first discuss the detection threshold of the survey, and then describe a Bay…
Extra-solar planets around HD196050, HD216437 and HD160691
Hugh R. A. Jones, R. Paul Butler, Geoffrey W. Marcy +4
We report precise Doppler measurements of the stars HD 216437, HD 196050 and HD 160691 obtained with the Anglo-Australian Telescope using the UCLES spectrometer together with an io…
New sub-millimeter limits on dust in the 55 Cancri planetary system
Ray Jayawardhana, Wayne S. Holland, Paul Kalas +4
We present new, high-sensitivity sub-millimeter observations towards 55 Cancri, a nearby G8 star with one, or possibly two, known planetary companion(s). Our 850 m map, obtained…
Confirmation of Solar-Like Oscillations in eta Bootis
H. Kjeldsen, T. R. Bedding, I. K. Baldry +9
We report observations of the G0 subgiant eta Boo made in 1998, in Balmer-line equivalent width with the 2.5-m Nordic Optical Telescope and in velocity with the 24-inch Lick CAT. I…