• Publications
  • Influence
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
A Planetary Companion to the Hyades Giant ∊ Tauri
Wereportthedetection of anextrasolarplanet orbitingTau,oneof thegiantstarsintheHyadesopencluster.This is the first planet ever discovered in an open cluster. Precise Doppler measurements of this starExpand
Spectroscopic Study on the Atmospheric Parameters of Nearby F-K Dwarfs and Subgiants
Based on a collection of high-dispersion spectra obtained at Okayama Astrophysical Observatory, the atmospheric parameters (Teff ,l ogg, vt ,a nd [Fe/H]) of 160 mid-F through early-K stars wereExpand
Chemical Composition of Carbon-Rich, Very Metal-Poor Subgiant LP 625-44 Observed with the Subaru/HDS ∗
We have obtained high-resolution (R ∼ 90000) spectra of the carbon- and s-process-element-rich, very metalpoor ([Fe/H] = −2.7) subgiant LP 625-44, as well as those of HD 140283 (a metal-poor subgiantExpand
Substellar Companions to Seven Evolved Intermediate-Mass Stars
We report the detections of substellar companions orbiting around seven evolved intermediate-mass stars from precise Doppler measurements at Okayama Astrophysical Observatory. o UMa (G4 II-III) is aExpand
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
Abundance Analyses of 12 Parent Stars of Extrasolar Planets Observed with the SUBARU/HDS ∗
High S/N ratio (350–600) and high resolution (R ∼90000) spectral data covering the wavelength region between 4200–8800 u A were obtained for 12 planet-harboring stars with the SUBARU/HDS. DetailedExpand
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