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...
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)...
Detection Of Lead In The Carbon-Rich, Very Metal-Poor Star Lp 625-44: A Strong Constraint On (2007)
Process Nucleosynthesis At, Wako Aoki, John E. Norris, Sean G. Ryan, Timothy C. Beers, Hiroyasu Ando
We report the detection of the Pb i l4057.8 line in the very metal-poor ( ), carbon-rich star, [Fe/H] = #2.7 LP 625-44. We determine the abundance of Pb ( ) and 15 other neutron-capture elements. The...
THE ASTROPHYSICAL JOURNAL, 561 346363, 2001 November 1 V (2007)
The American Astronomical, Wako Aoki, Sean G. Ryan, John E. Norris, Timothy C. Beers, Hiroyasu Ando, ...
We report abundance estimates for neutron capture elements, including lead (Pb), and nucleosynthesis models for their origin, in two carbon-rich, very metal-poor stars, LP 625-44 and LP 706-7. These...
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...
Aoki, Wako, Honda, Satoshi, Beers, Timothy C., Kajino, Toshitaka, Ando, Hiroyasu, Norris, John E., ...
Elemental abundance measurements have been obtained for a sample of 18 very metal-poor stars using spectra obtained with the Subaru Telescope High Dispersion Spectrograph. Seventeen stars, among...
Nucleosynthetic signatures of the first stars (2005)
Frebel, Anna, Aoki, Wako, Christlieb, Norbert, Ando, Hiroyasu, Asplund, Martin, Barklem, Paul S., ...
The chemically most primitive stars provide constraints on the nature of the first stellar objects that formed in the Universe; elements other than hydrogen, helium and traces of lithium within these...
A Young Brown Dwarf Companion to DH Tauri (2004)
Itoh, Yoichi, Hayashi, Masahiko, Tamura, Motohide, Tsuji, Takashi, Oasa, Yumiko, Fukagawa, Misato, ...
We present the detection of a young brown dwarf companion DH Tau B associated with the classical T Tauri star DH Tau. Near-infrared coronagraphic observations with CIAO on the Subaru Telescope have...
Current Performance and On-Going Improvements of the 8.2 m Subaru Telescope (2004)
Iye, Masanori, Karoji, Hiroshi, Ando, Hiroyasu, Kaifu, Norio, Kodaira, Keiichi
An overview of the current status of the 8.2 m Subaru Telescope constructed and operated at Mauna Kea, Hawaii, by the National Astronomical Observatory of Japan is presented. The basic design concept...
Oxygen Overabundance in the Extremely Iron-Poor Star CS29498-043 (2004)
Aoki, Wako, Norris, John E., Ryan, Sean G., Beers, Timothy C., Christlieb, Norbert, Tsangarides, Stelios, ...
An abundance analysis for the carbon-enhanced, extremely iron-poor ([Fe/H] -3.5) star CS29498-043 has been obtained using new high-resolution, high signal-to-noise spectra from the Subaru Telescope....
Current performance and on-going improvements of the 8.2 m Subaru Telescope (2004)
Iye, Masanori, Karoji, Hiroshi, Ando, Hiroyasu, Kaifu, Norio, Kodaira, Keiichi, Aoki, Kentaro, ...
An overview of the current status of the 8.2m Subaru Telescope constructed and operated at Mauna Kea, Hawaii, by the National Astronomical Observatory of Japan is presented. The basic design concept...
Aoki, Wako, Ryan, Sean G., Iwamoto, Nobuyuki, Beers, Timothy C., Norris, John E., Ando, Hiroyasu, ...
We report on the first measurement of the Eu isotope fractions (151Eu and 153Eu) in s-process-element-enhanced, metal-poor stars. We use these ratios to investigate the 151Sm branching of s-process...
Are Two z~6 Quasars Gravitationally Lensed ? (2003)
Yamada, Sanae F., Shioya, Yasuhiro, Taniguchi, Yoshiaki, Murayama, Takashi, Ajiki, Masaru, Nagao, Tohru, ...
Several high-z (z > 5.7) quasars have been found in the course of Sloan Digital Sky Survey. The presence of such very high-z quasars is expected to give constraints on early structure formation. On...
The discovery of a very narrow line star-forming object at a redshift of 5.66 (2003)
Taniguchi, Yoshiaki, Ajiki, Masaru, Murayama, Takashi, Nagao, Tohru, Veilleux, Sylvain, Sanders, David B., ...
SDSSp J104433.04$-$012502.2 at $z=5.74$ is Gravitationally Magnified by an Intervening Galaxy (2002)
Shioya, Yasuhiro, Taniguchi, Yoshiaki, Murayama, Takashi, Ajki, Masaru, Nagao, Tohru, Fujita, Shinobu S., ...
During the course of our optical deep survey program on L$\alpha$ emitters at $z \approx 5.7$ in the sky area surrounding the quasar SDSSp J104433.04$-$012502.2 at $z=5.74$, we found that a faint...
Aoki, Wako, Norris, John E., Ryan, Sean G., Beers, Timothy C., Ando, Hiroyasu
We report on an analysis of the chemical composition of five carbon-rich, very metal-poor stars based on high-resolution spectra. One star, CS22948-027, exhibits very large overabundances of carbon,...
Neutron Capture Elements in s-Process-Rich, Very Metal-Poor Stars (2001)
Aoki, Wako, Ryan, Sean G., Norris, John E., Beers, Timothy C., Ando, Hiroyasu, Iwamoto, Nobuyuki, ...
We report abundance estimates for neutron-capture elements, including lead (Pb), and nucleosynthesis models for their origin, in two carbon-rich, very metal-poor stars, LP625-44 and LP706-7. These...
s- and r-process elements in two very metal-poor stars (2000)
Ryan, Sean G., Aoki, Wako, Blake, Lisa A. J., Norris, John E., Beers, Timothy C., Gallino, Roberto, ...
New measurements of neutron-capture elements are presented for two very metal-poor stars ([Fe/H] ~ -3). One (LP 625-44) has an s-process signature believed to be due to mass transfer from a...