Arentoft, Torben, Kjeldsen, Hans, Bedding, Timothy R., Bazot, Michael, Christensen-Dalsgaard, Joergen, Dall, Thomas H., ...
We have carried out a multi-site campaign to measure oscillations in the F5 star Procyon A. We obtained high-precision velocity observations over more than three weeks with eleven telescopes, with...
Sato, Bun'ei, Toyota, Eri, Omiya, Masashi, Izumiura, Hideyuki, Kambe, Eiji, Masuda, Seiji, ...
We report on the detection of four extrasolar planets orbiting evolved intermediate-mass stars from a precise Doppler survey of G and K giants at Okayama Astrophysical Observatory. All of the host...
Measurement of the Spin-Orbit Angle of Exoplanet HAT-P-1b (2008)
Johnson, John A., Winn, Joshua N., Narita, Norio, Enya, Keigo, Williams, Peter K. G., Marcy, Geoffrey W., ...
We present new spectroscopic and photometric observations of the HAT-P-1 planetary system. Spectra obtained during three transits exhibit the Rossiter-McLaughlin effect, allowing us to measure the...
Stellar Parameters and Elemental Abundances of Late-G Giants (2008)
Takeda, Yoichi, Sato, Bun'ei, Murata, Daisuke
The properties of 322 intermediate-mass late-G giants (comprising 10 planet-host stars) selected as the targets of Okayama Planet Search Program, many of which are red-clump giants, were...
Evidence for a companion to BM Gem, a silicate carbon star (2008)
Izumiura, Hideyuki, Noguchi, Kunio, Aoki, Wako, Honda, Satoshi, Ando, Hiroyasu, Takada-Hidai, Masahide, ...
Balmer and Paschen continuum emission as well as Balmer series lines of P Cygni-type profile from H_gamma through H_23 are revealed in the violet spectra of BM Gem, a carbon star associated with an...
Sato, Bun'ei, Izumiura, Hideyuki, Toyota, Eri, Kambe, Eiji, Ikoma, Masahiro, Omiya, Masashi, ...
We report the detection of 3 new extrasolar planets from the precise Doppler survey of G and K giants at Okayama Astrophysical Observatory. The host stars, namely, 18 Del (G6 III), xi Aql (K0 III)...
A Possible Spin-Orbit Misalignment in the Transiting Eccentric Planet HD 17156b (2007)
Narita, Norio, Sato, Bun'ei, Ohshima, Osamu, Winn, Joshua N.
We present simultaneous photometric and spectroscopic observations of HD 17156b spanning a transit on UT 2007 November 12. This system is of special interest because of its 21-day period (unusually...
Liu, Xin, Turner, Edwin L., Narita, Norio, Suto, Yasushi, Winn, Joshua N., Yamada, Toru, ...
We present a new technique for detecting scattered starlight from transiting, close-orbiting extrasolar giant planets (CEGPs) that has the virtues of simplicity, robustness, linearity, and...
A Substellar Companion to the Intermediate-Mass Giant 11 Com (2007)
Liu, Y. J., Sato, Bun'ei, Zhao, G., Noguchi, Kunio, Wang, H., Kambe, Eiji, ...
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 Astrophysical...
Five Intermediate-Period Planets from the N2K Sample (2007)
Fischer, Debra A., Vogt, Steven S., Marcy, Geoffrey W., Butler, R. Paul, Sato, Bun'ei, Henry, Gregory W., ...
We report the detection of five Jovian mass planets orbiting high metallicity stars. Four of these stars were first observed as part of the N2K program and exhibited low RMS velocity scatter after...
Measurement of the Rossiter--McLaughlin Effect in the Transiting Exoplanetary System TrES-1 (2007)
Narita, Norio, Enya, Keigo, Sato, Bun'ei, Ohta, Yasuhiro, Winn, Joshua N., Suto, Yasushi, ...
We report a measurement of the Rossiter--McLaughlin effect in the transiting extrasolar planetary system TrES-1, via simultaneous spectroscopic and photometric observations with the Subaru and MAGNUM...
Subaru HDS Transmission Spectroscopy of the Transiting Extrasolar Planet HD 209458b (2005)
Narita, Norio, Suto, Yasushi, Winn, Joshua N., Turner, Edwin L., Aoki, Wako, Leigh, Christopher J., ...
We have searched for absorption in several common atomic species due to the atmosphere or exosphere of the transiting extrasolar planet HD 209458b, using high precision optical spectra obtained with...