An early-type eclipsing binary turns out to be a hierarchical quadruple system. Analysis of its complex configuration, although not easy, yields masses, radii, and temperatures of the inner binary, and mass estimations of the two outermost components.
Today we are celebrating with our colleague Darek Graczyk, who obtained the title of doctor habilitated!
An international team of astronomers within the Araucaria Project measured the distance to the Large Magellanic Cloud (LMC) with an exceptional accuracy of 1%.
Based on new observations and improved modeling techniques, we have re-analyzed seven Cepheids in the Large Magellanic Cloud.
We present analysis of eclipsing binary star LL Aqr which contains a solar twin component.
We present the results of a study of the type II Cepheid in the eclipsing binary system OGLE-LMC-T2CEP-098.
First determination of the mass and the projection factor for the first-overtone Cepheid OGLE-LMC-CEP-2532 in a binary system.
Binary system OGLE-LMC-CEP-1718 composed of two classical FO Cepheids confirmed spectroscopically and analized.
LMC distance determined with the accuracy of 2% using binary systems composed of giants.
SMC distance determined with the accuracy of 3% using binary systems composed of giants.