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