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Odessa database of atmospheric parameters and chemical composition of stars

Odessa database of atmospheric parameters and chemical composition of stars. F. A. Chekhonadskikh Odessa Astronomical Observatory Workshop – SCOPES – Odessa 2011. Mishenina, Kovtyukh, et al. Analysis of neutron capture elements in metal-poor stars.// A&A, 2001-2003.

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Odessa database of atmospheric parameters and chemical composition of stars

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  1. Odessa database of atmospheric parameters and chemical composition of stars F. A. Chekhonadskikh Odessa Astronomical Observatory Workshop – SCOPES – Odessa 2011

  2. Mishenina, Kovtyukh, et al. • Analysis of neutron capture elements in metal-poor stars.// A&A, 2001-2003. • On the correlation of elemental abundances with kinematics among galactic disk stars.// A&A, 2004. • Elemental abundances in the atmosphere of clump giants.// A&A, 2006-2007. • Spectroscopic investigation of stars on the lower main sequence.// A&A, 2008.

  3. Main results: • 100 metal-poor stars, -3 < [Fe/H] < -0.5, chemical composition: 15 elements. • 174 FGK dwarfs, 4683K < Teff. < 6178K, chemical composition: Fe and α-elements. • 177 clump giants, chemical composition: 10 elements. • 131 cool main sequence stars, chemical composition: 15 elements.

  4. Andrievsky, Kovtyukh, et al. • Using Cepheids to determine the galactic abundance gradient. I-IV.// A&A, 2002-2003. • Phase-dependent variation of the fundamental parameters of Cepheids. I-IV.// PASP, AJ, 2003-2008.

  5. Main results: • 225 classical Cepheids, chemical composition: 25 elements. • Galactic abundance gradient of 25 elements was obtained for the distance range 4-16 kpc. • Phase-dependent variation of the fundamental parameters and abundances were researched.

  6. Spectra: • 1.93-m telescope, ELODIE – OHP (France) • 2.1-m Struve reflector, Sandifordechelle spectrograph – McDonald Observatory (USA) • 1.52-m, 3.5-m, 8-m telescopes, FEROS, EMMI, UVES – ESO (Chile) R ~ 35000 – 60000, signal-to-noise better 100

  7. Tasks: • The original data, itemized in a MySQL database managed by the SQL language. • The code package, written in PHP for routine operations to import-export and backup data. • The web interface on CMS, written in HTML and PHP.

  8. Database content: List of stars: HD, comment. List of chemical elements: name of chemical element, atomic number, mass number, etc. Fundamental parameters of stellar atmospheres: effective temperature, microturbulentvelosity and gravity. Tables of abundances:

  9. Future challenges: Organization of a cross-access with SIMBAD Expansion of the database by adding additional characteristics of stars: absolute stellar magnitudes, intrinsic color indexes, color excess, radial velocities, distances, etc. Further testing and refining of the web-interface for better usability

  10. Thanks for your attention!

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