1 / 21

Y. Katsuta 1) , T. Suda 1,2) , S. Yamada 1) , N. Nishimura 3) ,

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)

brennan-jensen
Download Presentation

Y. Katsuta 1) , T. Suda 1,2) , S. Yamada 1) , N. Nishimura 3) ,

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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 University 2) Keele University 3) National Astronomical Observatory of Japan 4) Tokai University

  2. 1. SAGA database http://saga.sci.hokudai.ac.jp/ http://www.astro.keele.ac.uk/saga/ Suda et al.(2008) • Collection of observed data • taken from the literature on the abundance analyses of metal-poor stars in our Galactic halo • Compilation of adopted stellar parameters, derived abundance data, etc. • using on-line Data Registration System • Access to the data through web browsers • Data retrieval system

  3. 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 Complete collection

  4. 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

  5. Contents of the SAGA(3) • Observing logs: • Object name, position, Observing date, Telescope, Resolution, Typical S/N, Exposure, Radial velocity • Bibliography: Paper title, Author

  6. Hyperlink to the data retrieval system Screen snapshot of SAGA start page http://saga.sci.hokudai.ac.jp

  7. Range Specify X and Y axis Additional criteria

  8. SAGA search result Retrieved values and available data. Choose one datum if two or more data are available. Atmospheric parameters adopted for each object and reference Choose to plot this object

  9. Graph plot Link to quick preview of each object Automatically generated clickable map

  10. Quick Preview of Data Link to SIMBAD Abundance distribution of this object

  11. 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] data UNDER CONSTRUCTION

  12. [Fe/H] distribution • Well-known characteristics, high surface metallicity, of the PHSs can be seen □:non-PHS □:PHS Number [Fe/H] +:non-PHS △:PHS Teff [Fe/H]

  13. Vanadium abundances • Potential trend of overabundance of V (Sadakane et al. 2002, Bodaghee et al. 2006, Gilli 2006) Sadakane+2002 [V/Fe] SAGA+ 1.0 0 +:non-PHS △:PHS -0.2 -0.5 0 0.5 [Fe/H]

  14. Si abundances [Si/H] • Clear overabundance (Robinson et al. 2006) • Underabundance (Gonzalez & Laws 2007) [Fe/H] Robinson+2006 SAGA+ [Fe/H]

  15. Cross-reference data plot • [Na/Si] values are internally processed by [Na/Fe] and [Si/Fe] [Na/Si] [Fe/H]

  16. 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 masses

  17. 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

  18. Ni and Ti abundances • ６６２

More Related