y. katsuta 1) , t. suda 1,2) , s. yamada 1) , n. nishimura 3) ,
DESCRIPTION
S tellar A bundance for G alactic A rcheology (SAGA) Database and Its Extension for Planet-hosting Stars. Y. Katsuta 1) , T. Suda 1,2) , S. Yamada 1) , N. Nishimura 3) , Y. Komiya 3) , C, Ishizuka 1,2) , M.Y. Fujimoto 1) , M. Takada-Hidai 4) , Y. Gunji 4) , H. Toyosawa 4) - PowerPoint PPT PresentationTRANSCRIPT
Stellar Abundance for Galactic Archeology (SAGA) Database and Its
Extension for Planet-hosting Stars
Y. Katsuta1), T. Suda1,2), S. Yamada1), N. Nishimura3),Y. Komiya3), C, Ishizuka1,2), M.Y. Fujimoto1),M. Takada-Hidai4), Y. Gunji4), H. Toyosawa4)
1) Hokkaido University2) Keele University3) National Astronomical Observatory of Japan4) Tokai University
1. SAGA database
1. Collection of observed datataken from the literature on the abundance analyses of metal-poor stars in our Galactic halo
2. Compilation of adopted stellar parameters, derived abundance data, etc.
using on-line Data Registration System
3. Access to the data through web browsersData retrieval system
http://saga.sci.hokudai.ac.jp/ http://www.astro.keele.ac.uk/saga/ Suda et al.(2008)
Contents of SAGA(1)
Stars: Complete collection of published data for stars of [Fe/H] ≦-2.5
1305 stars (3208 when duplications included; from 149 papers)
Abundance data [X/Fe]: 19,185 [X/H]: 22,835 log ε: 22,835
Completecollection
Contents of the SAGA(2)
Atmosphere Teff, log g, [Fe/H], vturb
Photometry U, B, V, R, I, J, H, K Magnitudes Color indexes
Equivalent width Equivalent width, log gf, Excitation Potential
Isotopic ratio Binarity Referenced solar abundances
Contents of the SAGA(3)
Observing logs: Object name, position, Observing date,
Telescope, Resolution, Typical S/N, Exposure, Radial velocity
Bibliography: Paper title, Author
Screen snapshot of SAGA start page
Hyperlink to the data retrieval system
http://saga.sci.hokudai.ac.jp
Specify X and Y axis
Additional criteria
Range
Choose to plot this object
Atmospheric parameters adopted for each object and
reference
Retrieved values and available
data. Choose one datum if two or more
data are available.
SAGA search result
Automatically generated clickable map
Link to quick preview of each object
Graph plot
Quick Preview of Data
Link to SIMBAD
Abundance distribution of this object
Extension to the metal-rich stars and planet hosts
We have started to extend SAGA for the planet hosts and the metal-rich stars
Compiled data 10 papers 940 (1463) stars
• 72 PHS,• 868 non-PHS
12,156 [X/H] dataUNDER CONSTRUCTION
[Fe/H] distribution
Well-known characteristics, high surface metallicity, of the PHSs can be seen
Teff
[Fe/
H]
[Fe/H]
+:non-PHS△:PHS
Nu
mb
er
□:non-PHS□:PHS
Vanadium abundances
Potential trend of overabundance of V (Sadakane et al. 2002, Bodaghee et al. 2006, Gilli 2006)
[V/
Fe]
[Fe/H]-0.5 0 0.5
-0.2
0
1.0
Sadakane+2002
SAGA+
+:non-PHS△:PHS
Si abundances
Clear overabundance (Robinson et al. 2006)
Underabundance (Gonzalez & Laws 2007)
Robinson+2006 SAGA+[S
i/H
]
[Fe/H]
[Fe/H]
Cross-reference data plot
[Na/Si] values are internally processed by [Na/Fe] and [Si/Fe]
[Na/
Si]
[Fe/H]
Summary & Future works SAGA database
http://saga.sci.hokudai.ac.jp Easy to search, plot, and download data
We have started to extend SAGA database into higher metallicity stars and planet host stars
Some important data for metal-rich stars and planet hosts are to be installed in the future Stellar masses, Planet orbital parameters, Planet mas
ses
The new database will Reveal the characteristics of planet host
stars from the element abundances Reveal the whole history of the star
formation and chemical evolution in our Galaxy from the extremely metal-poor stars to the super metal-rich stars
Be open to the public in the near future
Ni and Ti abundances
662