Fundamental Parameters of the Eclipsing Binary DD CMa and Evidence for Mass Exchange

dc.contributor.authorRosales, J. A.
dc.contributor.authorMennickent, R. E.
dc.contributor.authorDjurašević, G.
dc.contributor.authorGonzález, J. F.
dc.contributor.authorAraya, I.
dc.contributor.authorCabezas, M.
dc.contributor.authorSchleicher, D. R. G.
dc.contributor.authorCuré M.
dc.date.accessioned2022-11-30T02:46:53Z
dc.date.available2022-11-30T02:46:53Z
dc.date.issued2021
dc.description.abstractWe present a detailed photometric and spectroscopic analysis of DD CMa, based on published survey photometry and new spectroscopic data. We find an improved orbital period of Po = 2.0084530(6) days. Our spectra reveal Hβ and Hα absorptions with weak emission shoulders, and we also find a color excess in the Wide-field Infrared Survey Explorer multiband photometry, interpreted as signatures of circumstellar matter. We model the V-band orbital light curve derived from the ASAS and ASAS-SN surveys, assuming a semidetached configuration and using the mass ratio and temperature of the hotter star derived from our spectroscopic analysis. Our model indicates that the system consists of a B2.5 dwarf and a B9 giant of radii 3.2 and 3.7 R⊙, respectively, orbiting in a circular orbit of radius 6.75 R⊙. We also found Mc = 1.7 ± 0.1 M⊙, Tc = 11,350 ± 100 K, and Mh = 6.4 ± 0.1 M⊙, Th = 20,000 ± 500 K, for the cooler and hotter star, respectively. We find broad single emission peaks in Hα and Hβ after subtracting the synthetic stellar spectra. Our results are consistent with mass exchange between the stars and suggest the existence of a stream of gas being accreted onto the early B-type star.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameRosales_Fun2021.pdf
dc.identifier.citationJ. A. Rosales et al 2021 AJ 161 165en_ES
dc.identifier.doihttps://doi.org/10.3847/1538-3881/abded0
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7522
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.subjectECLIPSING BINARY STARSen_ES
dc.subjectSTELLAR ACTIVITYen_ES
dc.subjectCIRCUMSTELLAR MATTERen_ES
dc.subjectFUNDAMENTAL PARAMETERS OF STARSen_ES
dc.titleFundamental Parameters of the Eclipsing Binary DD CMa and Evidence for Mass Exchange
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia

Archivos

Bloque original
Mostrando 1 - 1 de 1
Cargando...
Miniatura
Nombre:
Rosales_Fun2021.pdf
Tamaño:
2.23 MB
Formato:
Adobe Portable Document Format