Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314

@article{Sato2010SubstellarCT,
  title={Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314},
  author={Bun’ei Sato and Masashi Omiya and Yujuan Liu and Hiroki Harakawa and Hideyuki Izumiura and Eiji Kambe and Eri Toyota and Daisuke Murata and Byeong-Cheol Lee and Seiji Masuda and Yoichi Takeda and Michitoshi Yoshida and Yoichi Itoh and Hiroyasu Ando and Eiichiro Kokubo and Shigeru Ida and Gang Zhao and Inwoo Han},
  journal={Publications of the Astronomical Society of Japan},
  year={2010},
  volume={62},
  pages={1063-1069}
}
  • B. Sato, M. Omiya, +15 authors I. Han
  • Published 17 May 2010
  • Physics
  • Publications of the Astronomical Society of Japan
We report on the detection of two substellar companions orbiting around evolved intermediate-mass stars by precise Doppler measurements at Subaru Telescope and Okayama Astrophysical Observatory. HD 145457 is a K0 giant with a mass of 1.9 Mˇ, and has a planet of minimum mass, m2 sin i = 2.9 MJ, orbiting with a period of P = 176 d and eccentricity of e = 0:11. HD 180314 is also a K0 giant with 2.6Mˇ, and hosts a substellar companion of m2 sin i = 22 MJ, which falls in the brown-dwarf mass regime… Expand

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References

SHOWING 1-10 OF 49 REFERENCES
Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042
We report on the detection of four extrasolar planets orbiting evolved intermediate-mass stars from a precise Doppler survey of G-K giants at Okayama Astrophysical Observatory. All of the host starsExpand
A Massive Substellar Companion to the Massive Giant HD 119445
We detected a brown dwarf-mass companion around the intermediate-mass giant star HD 119445 (G6III) using the Doppler technique. This discovery is the first result from a KoreanJapanese planet searchExpand
Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
We report precision Doppler measurements of three intermediate-mass subgiants obtained at Lick and Keck Observatories. All three stars show variability in their radial velocities consistent withExpand
A planet around the evolved intermediate-mass star HD 110014 ,
Context. We found evidence for a sub–stellar companion around the K giant star HD 110014. This cool evolved star, with a spectral type K2III and an estimated mass between 1.9 and 2.4 M� , is slightlyExpand
A substellar companion around the intermediate-mass giant star HD 11977
We report the discovery of a substellar companion to the intermediate-mass star HD 11977 (G5 III). Radial velocities of this star have been monitored for five years with FEROS at the 1.52-m ESO andExpand
Substellar-mass companions to the K-dwarf BD +14 4559 and the K-giants HD 240210 and BD +20 2457
We present the discovery of substellar-mass companions to three stars by the ongoing Penn State-Torun Planet Search conducted with the 9.2 m Hobby-Eberly Telescope. The K2-dwarf, BD+14 4559, has aExpand
A Substellar Companion to the Intermediate-Mass Giant 11 Comae
We report the detection of a substellar companion orbiting the intermediate-mass giant star 11 Com (G8 III). Precise Doppler measurements of the star from Xinglong Station and Okayama AstrophysicalExpand
Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, ξ Aquilae, and HD 81688
We report on the detection of 3 new extrasolar planets from a precise Doppler survey of G and K giants at Okayama Astrophysical Observatory. The host stars, 18 Del (G6 III), � Aql (K0 III) and HDExpand
Discovery of a planetary companion to the G-type giant star HD 104985
We report the detection of a planetary-mass companion to the G9 III giant star HD 104985 from precise Doppler velocity measurements made using the High Dispersion Echelle Spectrograph (HIDES) atExpand
A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272
We report the discovery of one or more planet-mass companions to the K0-giant HD 102272 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed periodicities with theExpand
...
1
2
3
4
5
...