Five planets and an independent confirmation of HD 196885ab from lick observatory

Debra Fischer, Peter Driscoll, Howard Isaacson, Matt Giguere, Geoffrey W. Marcy, Jeff Valenti, Jason T. Wright, Gregory W. Henry, John Asher Johnson, Andrew Howard, Katherine Peek, Chris Mccarthy

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Abstract

We present time series Doppler data from Lick Observatory that reveal the presence of long-period planetary companions orbiting nearby stars. The typical eccentricity of these massive planets are greater than the mean eccentricity of known exoplanets. HD 30562b has Msin i = 1.29 M Jup, with semimajor axis of 2.3 AU and eccentricity 0.76. The host star has a spectral type F8V and is metal rich. HD 86264b has Msin i = 7.0 M Jup, a rel = 2.86 AU, an eccentricity e = 0.7 and orbits a metal-rich, F7V star. HD 87883b has Msin i = 1.78 M Jup, a rel = 3.6 AU, e = 0.53 and orbits a metal-rich K0V star. HD 89307b has Msin i = 1.78 M Jup, a rel = 3.3 AU, e = 0.24 and orbits a G0V star with slightly subsolar metallicity. HD 148427b has Msin i = 0.96 M Jup, a rel = 0.93 AU, eccentricity of 0.16 and orbits a metal rich K0 subgiant. We also present velocities for a planet orbiting the F8V metal-rich binary star, HD 196885A. The planet has Msin i = 2.58 M Jup, a rel = 2.37 AU, and orbital eccentricity of 0.48, in agreement with the independent discovery by Correia et al.

Original languageEnglish (US)
Pages (from-to)1545-1556
Number of pages12
JournalAstrophysical Journal
Volume703
Issue number2
DOIs
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Fischer, D., Driscoll, P., Isaacson, H., Giguere, M., Marcy, G. W., Valenti, J., Wright, J. T., Henry, G. W., Johnson, J. A., Howard, A., Peek, K., & Mccarthy, C. (2009). Five planets and an independent confirmation of HD 196885ab from lick observatory. Astrophysical Journal, 703(2), 1545-1556. https://doi.org/10.1088/0004-637X/703/2/1545