A Massive Substellar Companion to the Massive Giant HD 119445 (2009)
Omiya, Masashi, Izumiura, Hideyuki, Han, Inwoo, Lee, Byeong-Cheol, Sato, Bun'ei, Kambe, Eiji, ...
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 Korean-Japanese planet search...
Mass Loss History of the AGB star, R Cas (2009)
Ueta, Toshiya, Stencel, Robert E., Yamamura, Issei, Izumiura, Hideyuki, Nakada, Yoshikazu, Matsuura, Mikako, ...
We report here on the discovery of an extended far-infrared shell around the AGB star, R Cassiopeia, made by AKARI and Spitzer. The extended, cold circumstellar shell of R Cas spans nearly 3 arcmin...
Ueta, Toshiya, Izumiura, Hideyuki, Yamamura, Issei, Stencel, Robert E., Nakada, Yoshikazu, Matsuura, Mikako, ...
Recent far-infrared mapping of mass-losing stars by the AKARI Infrared Astronomy Satellite and Spitzer Space Telescope have suggested that far-infrared bow shock structures are probably ubiquitous...
AKARI/FIS Mapping of the ISM-Wind Bow Shock around Alpha Ori (2008)
Ueta, Toshiya, Izumiura, Hideyuki, Yamamura, Issei, Nakada, Yoshikazu, Matsuura, Mikako, Ita, Yoshifusa, ...
We present 10' x 50' scan maps around an M supergiant Alpha Ori at 65, 90, 140 and 160 microns obtained with the AKARI Infrared Astronomy Satellite. Higher spatial resolution data with the exact...
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...
Asymmetric silicate dust distribution toward the silicate carbon star BM Gem (2008)
Ohnaka, Keiichi, Izumiura, Hideyuki, Leinert, Christoph, Driebe, Thomas, Weigelt, Gerd, Wittkowski, Markus
Silicate carbon stars show the 10 micron silicate emission, despite their carbon-rich photospheres. They are considered to have circumbinary or circum-companion disks, which serve as a reservoir of...
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...
Otsuka, Masaaki, Izumiura, Hideyuki, Tajitsu, Akito, Hyung, Siek
We have found the fluorine lines [F IV] 3996.92A,4059.90A in the extremely metal-poor ([Ar/H] = -2.10+/-0.21) halo planetary nebula (PN) BoBn 1 in high-dispersion spectra from the 8.2-m VLT/UVES...
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)...
The SPICA Consortium, Swinyard, Bruce, Nakagawa, Takao, Merken, Patrick, Royer, Pierre, Souverijns, Tim, ...
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...
SiO Maser Survey of the Inner Bar of the Galactic Bulge (2006)
Fujii, Takahiro, Deguchi, Shuji, Izumiura, Hideyuki, Kameya, Osamu, Miyazaki, Atsushi, Nakada, Yoshikazu
We surveyed 291 MSX/2MASS infrared objects in the 7 x 2 deg area of the galactic center in the 43 GHz SiO J=1--0 v=1 and 2 maser lines, obtaining accurate radial velocities of 163 detected objects....
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...
SiO Maser Forest at the Galactic Center (1997)
Izumiura, Hideyuki, Deguchi, Shuji, Fujii, Takahiro
A moderately deep survey of stellar maser sources toward the Galactic center has been made in the SiO J=1-0 v=1 and v=2 transitions (~ 43 GHz) with the Nobeyama 45-m telescope of a beam size of about...