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Red Giants in Eclipsing Binaries

wtorek, Grudzień 16, 2014 - 11:15

  Zapraszamy wszystkich zainteresowanych na Seminarium Instytutu Astronomii:

"Red Giants in Eclipsing Binaries" (cz.2)

We wtorek 16 grudnia o godz. 11.15 w sali 34 (bud. A-2, ul. Szafrana 2) seminarium wygłosi:

mgr Milena Ratajczak

(CAMK Toruń)

Eclipsing binary stars provide main source of information about fundamental stellar properties like masses and radii, and the accuracy in parameters derivation at the level of 3% makes them particularly useful for testing stellar structure and evolution models. Extremely stringent constrains on stellar evolution may be provided by the studies of evolved stars, e.g. red giants. The survey of long period eclipsing binaries from the All Sky Automated Survey (ASAS) catalogue aims at searching for and characterizing subgiants and red giants in double-lined detached binary systems. Absolute physical and orbital parameters based on radial velocities from high quality optical spectra, obtained with the 8.2 m Subaru/HDS, ESO 3.6 m/HARPS, 1.9 m Radcliffe/GIRAFFE, CTIO 1.5 m/CHIRON, and 1.2 m Euler/CORALIE, and photometric data from ASAS, SuperWASP, and the Solaris Project will be presented. We shall discuss the derived uncertainties for individual masses and radii of components, as well as the results of the spectral analysis performed for components of the systems whose spectra we disentangled.