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| DOI | 10.1051/0004-6361/202451720 | ||||
| Año | 2024 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Context. Detached eclipsing binaries (DEBs) allow for the possibility of a precise characterization of their stellar components. They offer a unique opportunity for deriving their physical parameters nearly independent of a model for a number of systems consisting of late-type giant stars. We aim to expand the sample of low-metallicity late-type giant stars with precisely determined parameters. Aims. We determine the fundamental parameters, such as the mass and radius, or the effective temperature for three long-period late-type eclipsing binaries from the Large Magellanic Cloud: OGLE-LMC-ECL-25304, OGLE-LMC-ECL-28283, and OGLE-IV LMC554.19.81. Subsequently, we determine the evolutionary stages of the systems. Methods. We fit the light curves from the OGLE project and radial velocity curves from high-resolution spectrographs using the Wilson-Devinney code. The spectral analysis was performed with the GSSP code and resulted in the determination of atmospheric parameters such as effective temperatures and metallicities. We used the isochrones provided by the MIST models based on the MESA code to derive the evolutionary status of the stars. Results. We present the first analysis of three DEBs composed of similar helium-burning late-type stars that pass through the blue loop. The estimated masses for OGLE-LMC-ECL-29293 (G4III + G4III) are M-1 = 2.898 +/- 0.031 and M-2 = 3.153 +/- 0.038 M-circle dot, and the stellar radii are R-1 = 19.43 +/- 0.31 and R-2 = 19.30 +/- 0.31 R-circle dot. OGLE-LMC-ECL-25304 (G4III + G5III) has stellar masses of M-1 = 3.267 +/- 0.028 and M-2 = 3.229 +/- 0.029 M-circle dot and radii of R-1 = 23.62 +/- 0.42 and R-2 = 25.10 +/- 0.43 R-circle dot. OGLE-IV LMC554.19.81 (G2III + G2III) has masses of M-1 = 3.165 +/- 0.020 and M-2 = 3.184 +/- 0.020 M-circle dot and radii of R-1 = 18.86 +/- 0.26 and R-2 = 19.64 +/- 0.26 R-circle dot. All masses were determined with a precision better than 2% and the precision for the radii is better than 1.5%. The ages of the stars are in the range of 270-341 Myr.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Rojas García, Gonzalo | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 2 | Graczyk, Dariusz | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 3 | Pietrzynski, Grzegorz | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 4 | Galan, Cezary | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 5 | Gieren, Wolfgang | Hombre |
Universidad de Concepción - Chile
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| 6 | Thompson, Ian B. | Hombre |
Carnegie Observ - Estados Unidos
Carnegie Observatories - Estados Unidos |
| 7 | Suchomska, K. | Mujer |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 8 | Kaluszynski, M. | - |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 9 | Soszynski, I. | Hombre |
Univ Warsaw - Polonia
University of Warsaw - Polonia |
| 10 | Udalski, Andrzej | Hombre |
Univ Warsaw - Polonia
University of Warsaw - Polonia |
| 11 | Karczmarek, Paulina | Mujer |
Universidad de Concepción - Chile
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| 12 | Narloch, W. | Mujer |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 13 | Gorski, Marek | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 14 | Wielgorski, Piotr | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 15 | Zgirski, B. | - |
Universidad de Concepción - Chile
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| 16 | Miller, N. | - |
UPPSALA UNIV - Suecia
Uppsala Universitet - Suecia |
| 17 | Hajdu, G. | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 18 | Pilecki, Bogumill | Hombre |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 19 | Taormina, M. | Mujer |
Nicolaus Copernicus Astron Ctr - Polonia
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences - Polonia |
| 20 | Lewis, M. | Mujer |
Leiden Univ - Países Bajos
Sterrewacht Leiden - Países Bajos |
| Fuente |
|---|
| Polish Ministry of Science and Higher Education |
| European Research Council |
| Narodowe Centrum Nauki |
| National Science Centre, Poland |
| Horizon 2020 Framework Programme |
| Fundacja na rzecz Nauki Polskiej |
| Foundation for Polish Science |
| National Science Centre, Poland (NCN) |
| Ministerstwo Edukacji i Nauki |
| Polish-French Marie Skłodowska-Curie and Pierre Curie Science Prize |
| Polish-French Marie Sklodowska-Curie |
| European Research Council (ERC) under the Horizon 2020 program |
| Agradecimiento |
|---|
| The research leading to these results has received funding from the European Research Council (ERC) under the Horizon 2020 program (grant No. 951549 - UniverScale), the Polish Ministry of Science and Higher Education (grant 2024/WK/02), and the Polish-French Marie Sk & lstrok;odowska-Curie and Pierre Curie Science Prize from the Foundation for Polish Science. G.R.G. acknowledges the financial support of the National Science Centre, Poland (NCN) under the project No. 2017/26/A/ST9/00446. This work has been co-funded by the National Science Centre, Poland, grant No. 2022/45/B/ST9/00243. |
| The research leading to these results has received funding from the European Research Council (ERC) under the Horizon 2020 program (grant No. 951549 - UniverScale), the Polish Ministry of Science and Higher Education (grant 2024/WK/02), and the Polish-French Marie Sklodowska-Curie and Pierre Curie Science Prize from the Foundation for Polish Science. G.R.G. acknowledges the financial support of the National Science Centre, Poland (NCN) under the project No. 2017/26/A/ST9/00446. This work has been cofunded by the National Science Centre, Poland, grant No. 2022/45/B/ST9/00243. |
| The research leading to these results has received funding from the European Research Council (ERC) under the Horizon 2020 program (grant No. 951549 - UniverScale), the Polish Ministry of Science and Higher Education (grant 2024/WK/02), and the Polish-French Marie Sklodowska-Curie and Pierre Curie Science Prize from the Foundation for Polish Science. G.R.G. acknowledges the financial support of the National Science Centre, Poland (NCN) under the project No. 2017/26/A/ST9/00446. This work has been cofunded by the National Science Centre, Poland, grant No. 2022/45/B/ST9/00243. |