Browsing by Author "Johnson, J"

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    The N2K consortium.: I.: A hot Saturn planet orbiting HD 88133
    (2005) Fischer, DA; Laughlin, G; Butler, P; Marcy, G; Johnson, J; Henry, G; Valenti, J; Vogt, S; Ammons, M; Robinson, S; Spear, G; Strader, J; Driscoll, P; Fuller, A; Johnson, T; Manrao, E; McCarthy, C; Muñoz, M; Tah, KL; Wright, J; Ida, S; Sato, B; Toyota, E; Minniti, D
    The N2K ("next 2000'') consortium is carrying out a distributed observing campaign with the Keck, Magellan, and Subaru telescopes, as well as the automatic photometric telescopes of Fairborn Observatory, in order to search for short-period gas giant planets around metal-rich stars. We have established a reservoir of more than 14,000 main-sequence and subgiant stars closer than 110 pc, brighter than V = 10.5, and with 0.4 < B - V < 1.2. Because the fraction of stars with planets is a sensitive function of stellar metallicity, a broadband photometric calibration has been developed to identify a subset of 2000 stars with [Fe/H] > 0.1 dex for this survey. We outline the strategy and report the detection of a planet orbiting the metal-rich G5 IV star HD 88133 with a period of 3.41 days, semivelocity amplitude K = 35.7 m s(-1), and M sin i = 0.29 M-J. Photometric observations reveal that HD 88133 is constant on the 3.415 day radial velocity period to a limit of 0.0005 mag. Despite a transit probability of 19.5%, our photometry rules out the shallow transits predicted by the large stellar radius.