The White Dwarf Binary Pathways Survey - IV. Three close white dwarf binaries with G-type secondary stars
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Cita com:
hdl:2117/360516
Tipus de documentArticle
Data publicació2021-02-01
EditorOxford University Press
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteDEL ENFRIAMIENTO A LAS EXPLOSIONES: LA FISICA DE LOS OBJETOS COMPACTOS (AEI-AYA2017-86274-P)
Abstract
Constraints from surveys of post common envelope binaries (PCEBs) consisting of a white
dwarf plus an M-dwarf companion have led to significant progress in our understanding of
the formation of close white dwarf binary stars with low-mass companions. The white dwarf
binary pathways project aims at extending these previous surveys to larger secondary masses,
i.e. secondary stars of spectral type AFGK. Here we present the discovery and observational
characterization of three PCEBs with G-type secondary stars and orbital periods between 1¿2
and 2¿5 days. Using our own tools as well as MESA we estimate the evolutionary history of the
binary stars and predict their future. We find a large range of possible evolutionary histories
for all three systems and identify no indications for differences in common envelope evolution
compared to PCEBs with lower mass secondary stars. Despite their similarities in orbital
period and secondary spectral type, we estimate that the future of the three systems are very
different: TYC4962-1205-1 is a progenitor of a cataclysmic variable system with an evolved
donor star, TYC 4700-815-1 will run into dynamically unstable mass transfer that will cause
the two stars to merge, and TYC1380-957-1 may appear as super soft source before becoming
a rather typical cataclysmic variable star.
CitacióSchreiber, M.R. [et al.]. The White Dwarf Binary Pathways Survey - IV. Three close white dwarf binaries with G-type secondary stars. "Monthly notices of the Royal Astronomical Society", 1 Febrer 2021, vol. 501, p. 1677-1689.
ISSN1365-2966
Versió de l'editorhttps://academic.oup.com/mnras/article-abstract/501/2/1677/6034016
Altres identificadorshttps://arxiv.org/abs/2012.04683
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hernandez-et-al_2021.pdf | 4,806Mb | Visualitza/Obre |