Eclipsing binaries in the OGLE variable star catalogue: long-period evolved systems
| Autor: | O. Özdarcan, Sara Bulut, Ömür Çakırlı, Barış Hoyman |
|---|---|
| Přispěvatelé: | Ege Üniversitesi |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences stars: late-type Astronomy binaries: eclipsing Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Space and Planetary Science Long period 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics stars: evolution stars: fundamental parameters Space Science Variable star 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics binaries: spectroscopic 0105 earth and related environmental sciences |
| Popis: | Red giant stars are proving to be an exceptional source of information for testing models of stellar evolution, as photometric and spectroscopic analysis has opened up a window into their interiors, providing an exciting chance to develop highly constrained stellar models. in this study, we present a determination of precise fundamental physical parameters belonging to five detached, double-lined, eclipsing binary stars in the Large and Small Magellanic Clouds containing G- or early K-type giant stars with extended envelopes. We also derived the distances to the systems by using a temperature-colour relation and compared these distances with the measurements provided in the literature. the measured stellar masses are in the range 1.8-3.0 M-circle dot and comparison with the PAdova and TRieste Stellar Evolution Code (PARSEC) isochrones gives ages between 0.4 and 1.1 Gyr. the derived uncertainties for individual masses and radii of components are better than 3 and 7 per cent, respectively, for these systems. Additionally, we performed atmospheric parameter determination and [M/H] analysis for each, where we disentangled the spectra. ESO [094.D-0056(A), 095.D-0424(A), 097.D-0150(A), 0100.D-0273(A), 092.D-0363(A), 096.D-0425(A), 097.D-0400(A), 098.D-0263(A), 0100.D-0339(A), 0100.D-0339(B)]; NASA's Science Mission Directorate This research made use of data collected at ESO under programmes 094.D-0056(A), 095.D-0424(A), 097.D-0150(A), 0100.D-0273(A) (by W. Gieren), 092.D-0363(A), 096.D-0425(A), 097.D-0400(A), 098.D-0263(A), 0100.D-0339(A) and 0100.D-0339(B) (by G. Pietrzynski). This work is based on data from the OGLE mission. OGLE was competitively selected as the tenth Discovery mission. Funding for this mission is provided by NASA's Science Mission Directorate. the authors express their sincere thanks to an anonymous referee, whose valuable comments led to an improvement of the article. the following internet-based resources were used in the research for this article: the NASA Astrophysics Data System and the SIMBAD database operated at CDS, Strasbourg, France. |
| Databáze: | OpenAIRE |
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