Stellar and Accretion Disk Parameters of the Close Binary HD 50526

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dc.contributor.authorRosales, J. A.
dc.contributor.authorMennickent, R. E.
dc.contributor.authorDjurašević, G.
dc.contributor.authorSchleicher, D. R. G.
dc.contributor.authorZharikov, S.
dc.contributor.authorAraya, I.
dc.contributor.authorCeledón, L.
dc.contributor.authorCuré, M.
dc.date.accessioned2022-11-30T02:46:54Z
dc.date.available2022-11-30T02:46:54Z
dc.date.issued2021
dc.description.abstractWe present a photometric and spectroscopic study of HD 50526, an ellipsoidal binary member of the group Double Periodic Variable stars. Performing data mining in photometric surveys and conducting new spectroscopic observations with several spectrographs during 2008–2015, we obtained orbital and stellar parameters of the system. The radial velocities were analyzed with the genetic PIKAIA algorithm, whereas Doppler tomography maps for the Hα and Hβ lines were constructed with the Total Variation Minimization code. An optimized simplex algorithm was used to solve the inverse problem adjusting the light curve with the best stellar parameters for the system. We find an orbital period of 6fd701 ± 0fd001 and a long photometric cycle of 191 ± 2 days. We detected the spectral features of the coldest star and modeled it with a $\mathrm{log}g=2.79\pm 0.02\,\mathrm{dex}$ giant of mass 1.13 ± 0.02 M⊙ and effective temperature 10500 ± 125 K. In addition, we determine a mass ratio q = 0.206 ± 0.033 and that the hot star is a B-type dwarf of mass 5.48 ± 0.02 M⊙. The V-band orbital light curve can be modeled including the presence of an accretion disk around the hotter star. This fills the Roche lobe of the hotter star and has a radius 14.74 ± 0.02 R⊙ and the temperature at the outer edge is 9400 K. Two bright spots located in the disk account for the global morphology of the light curve. The Doppler tomography maps of Hα and Hβ reveal complex structures of mass fluxes in the system.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameRosales_Ste2021.pdf
dc.identifier.citationJ. A. Rosales et al 2021 AJ 162 66en_ES
dc.identifier.doihttps://doi.org/10.3847/1538-3881/ac02ba
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7523
dc.languageen
dc.publisherAmerican Astronomical Society (Aas)
dc.rights© 2021. The American Astronomical Society. All rights reserved.
dc.sourceThe Astronomical Journal
dc.subjectCLOSE BINARY STARSen_ES
dc.subjectSEMI-DETACHED BINARY STARSen_ES
dc.subjectSPECTROSCOPIC BINARY STARSen_ES
dc.subjectEARLY-TYPE STARSen_ES
dc.subjectSTELLAR MASS LOSSen_ES
dc.titleStellar and Accretion Disk Parameters of the Close Binary HD 50526
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia

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