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Evidence for a companion to BM Gem, a silicate carbon star
Hideyuki Izumiura, Kunio Noguchi, Wako Aoki +12
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 a…
Observation of the first gravitational microlensing event in a sparse stellar field : the Tago event
A. Fukui, F. Abe, K. Ayani +17
We report the observation of the first gravitational microlensing event in a sparse stellar field, involving the brightest (V=11.4 mag) andclosest (~ 1 kpc) source star to date. Th…
Constructing the Subaru Advanced Data and Analysis Service on VO
Yuji Shirasaki, Masahiro Tanaka, Satoshi Honda +10
We present our activity on making the Subaru Data Archive accessible through the Japanese Virtual Observatory (JVO) system. There are a lot of demand to use the archived Subaru dat…
Japanese Virtual Observatory (JVO) as an advanced astronomical research enviroment
Y. Shirasaki, M. Tanaka, S. Kawanomoto +10
We present the design and implementation of the Japanese Virtual Observatory (JVO) system. JVO is a portal site to various kinds of astronomical resources distributed all over the…
A low upper-limit on the lithium isotope ratio in HD140283
Wako Aoki, Susumu Inoue, Satoshi Kawanomoto +4
We have obtained a high-S/N (900-1100), high-resolving-power (R=95000) spectrum of the metal-poor subgiant HD 140283 in an effort to measure its 6Li/7Li isotope ratio. From a 1-D a…
Spectroscopic Studies of Extremely Metal-Poor Stars with Subaru/HDS:I. Observational Data
S. Honda, W. Aoki, H. Ando +14
We have obtained high-resolution (R 50,000 or 90,000), high-quality (S/N $\ga$ 100) spectra of 22 very metal-poor stars ([Fe/H] $\la$ -2.5) with the High Dispersion Spectr…
Photospheric Abundances of Volatile and Refractory Elements in Planet-Harboring Stars
Y. Takeda, B. Sato, E. Kambe +16
By using the high-dispersion spectra of 14 bright planet-harboring stars (along with 4 reference stars) observed with the new coude echelle spectrograph at Okayama Astrophysical Ob…
Behavior of Sulfur Abundances in Metal-Poor Giants and Dwarfs
M. Takada-Hidai, Y. Takeda, S. Sato +6
LTE and NLTE abundances of sulfur in 6 metal-poor giants and 61 dwarfs (62 dwarfs, including the Sun) were explored in the range of -3 \lsim [Fe/H] \lsim using high-resoluti…
New Detremination Method of Primordial Li Abundance
T. Kajino, T. -K. Suzuki, S. Kawanomoto +1
We discuss the primordial nucleosynthesis in lepton asymmetric Universe models. In order to better estimate the universal baryon-mass density parameter , we try to remove the…