An eccentric hot jupiter orbiting the subgiant HD 185269

John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Gregory W. Henry, Jason T. Wright, Howard Isaacson, Chris McCarthy

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

We report the detection of a Jupiter-mass planet in a 6.838 day orbit around the 1.28 M subgiant HD 185269. The eccentricity of HD 185269b (e = 0.30) is unusually large compared to other planets within 0.1 AU of their stars. Photometric observations demonstrate that the star is constant to ±0.0001 mag on the radial velocity period, strengthening our interpretation of a planetary companion. This planet was detected as part of our radial velocity survey of evolved stars located on the subgiant branch of the H-R diagram-also known as the Hertzsprung gap. These stars, which have masses between 1.2 and 2.5 M play an important role in the investigation of the frequency of extrasolar planets as a function of stellar mass.

Original languageEnglish (US)
Pages (from-to)1724-1728
Number of pages5
JournalAstrophysical Journal
Volume652
Issue number2 I
DOIs
StatePublished - Dec 1 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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