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Accurate stellar parameters and distance to two evolved eclipsing binary systems, OGLE-BLG-ECL-123903 and OGLE-BLG-ECL-296596, towards the Galactic bulge

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cris.lastimport.scopus2024-02-12T19:32:55Z
dc.abstract.enAims: Our aim is to obtain high-accuracy measurements of the physical and orbital parameters of two evolved eclipsing binary systems, and to use these measurements to study their evolutionary status. We also aim to derive the distances to the systems by using a surface brightness-colour relation and compare these distances with the measurements provided by Gaia. Methods: We measured the physical and orbital parameters of both systems based on V-band and I-band photometry from OGLE, near-infrared photometry obtained with the NTT telescope and the instrument SOFI, as well as high-resolution spectra obtained at ESO 3.6m/HARPS and Clay 6.5/MIKE spectrographs. The light curves and radial-velocity curves were analysed with the Wilson-Devinney code. Results: We analysed two double-lined eclipsing binary systems OGLE-BLG-ECL-123903 and OGLE-BLG-ECL-296596 from the Optical Gravitational Lensing Experiment (OGLE) catalogue. Both systems have a configuration of two well-detached giants stars. The masses of the components of OGLE-BLG-ECL-123903 are M<SUB>1</SUB> = 2.045 ± 0.027 and M<SUB>2</SUB> = 2.074 ± 0.023 M<SUB>⊙</SUB> and the radii are R<SUB>1</SUB> = 9.540 ± 0.049 and R<SUB>2</SUB> = 9.052 ± 0.060 R<SUB>⊙</SUB>. For OGLE-BLG-ECL-296596, the masses are M<SUB>1</SUB> = 1.093 ± 0.015 and M<SUB>2</SUB> = 1.125 ± 0.014 M<SUB>⊙</SUB>, while the radii are R<SUB>1</SUB> = 18.06 ± 0.28 and R<SUB>2</SUB> = 29.80 ± 0.33 R<SUB>⊙</SUB>. Evolutionary status was discussed based on the isochrones and evolutionary tracks from PARSEC and MESA codes. The ages of the systems were established to be around 1.3 Gyr for the OGLE-BLG-ECL-123903 and 7.7 Gyr for the OGLE-BLG-ECL-296596. We also determined the distance to both systems. For OGLE-BLG-ECL-123903 this is equal to d = 2.95 ± 0.06 (stat.) ±0.07 (syst.) kpc, while for the OGLE-BLG-ECL-296596 it is d = 5.68 ± 0.07 (stat.) ±0.14 (syst.) kpc. This is the first analysis of its kind for these unique evolved eclipsing binary systems.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSuchomska, Ksenia
dc.contributor.authorGraczyk, D.
dc.contributor.authorPietrzyński, G.
dc.contributor.authorGieren, W.
dc.contributor.authorOstrowski, J.
dc.contributor.authorSmolec, R.
dc.contributor.authorTkachenko, A.
dc.contributor.authorGórski, M.
dc.contributor.authorKarczmarek, Paulina
dc.contributor.authorWielgórski, P.
dc.contributor.authorZgirski, B.
dc.contributor.authorThompson, I. B.
dc.contributor.authorVillanova, S.
dc.contributor.authorPilecki, B.
dc.contributor.authorTaormina, M.
dc.contributor.authorKołaczkowski, Z.
dc.contributor.authorNarloch, W.
dc.contributor.authorSoszyński, Igor
dc.date.accessioned2024-01-24T15:37:43Z
dc.date.available2024-01-24T15:37:43Z
dc.date.copyright2019-04-19
dc.date.issued2019
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.versionORIGINAL_AUTHOR
dc.description.volume621
dc.identifier.doi10.1051/0004-6361/201834298
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/100187
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2019A&A...621A..93S
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA93
dc.rightsOther
dc.sciencecloudnosend
dc.titleAccurate stellar parameters and distance to two evolved eclipsing binary systems, OGLE-BLG-ECL-123903 and OGLE-BLG-ECL-296596, towards the Galactic bulge
dc.typeJournalArticle
dspace.entity.typePublication