The White Dwarf Binary Pathways Survey -III. Contamination from hierarchical triples containing a white dwarf

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dc.contributor.authorLagos, F.
dc.contributor.authorSchreiber, M. R.
dc.contributor.authorParsons, S. G.
dc.contributor.authorZurlo, A.
dc.contributor.authorMesa, D.
dc.contributor.authorGansicke, B. T.
dc.contributor.authorBrahm, R.
dc.contributor.authorCaceres, C.
dc.contributor.authorCanovas, H.
dc.contributor.authorHernandez, M-S
dc.contributor.authorJordan, A.
dc.contributor.authorKoester, D.
dc.contributor.authorSchmidtobreick, L.
dc.contributor.authorTappert, C.
dc.contributor.authorZorotovic, M.
dc.date.accessioned2025-01-23T19:51:41Z
dc.date.available2025-01-23T19:51:41Z
dc.date.issued2020
dc.description.abstractThe White Dwarf Binary Pathways Survey aims at increasing the number of known detached A, F, G, and K main-sequence stars in close orbits with white dwarf companions (WD+AFGK binaries) to refine our understanding about compact binary evolution and the nature of Supernova Ia progenitors. These close WD+AFGK binary stars are expected to form through common envelope evolution, in which tidal forces tend to circularize the orbit. However, some of the identified WD+AFGK binary candidates show eccentric orbits, indicating that these systems are either formed through a different mechanism or perhaps they are not close WD+AFGK binaries. We observed one of these eccentric WD+AFGK binaries with SPHERE and find that the system TYC 7218-934-1 is in fact a triple system where the WD is a distant companion. The inner binary likely consists of the G-type star plus an unseen low-mass companion in an eccentric orbit. Based on this finding, we estimate the fraction of triple systems that could contaminate the WD+AFGK sample. We find that less than 15 per cent of our targets with orbital periods shorter than 100 d might be hierarchical triples.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/staa747
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/staa747
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100594
dc.identifier.wosidWOS:000535885900070
dc.issue.numero1
dc.language.isoen
dc.pagina.final922
dc.pagina.inicio915
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectmethods: numerical
dc.subjectmethods: statistical
dc.subjectbinaries: close
dc.subjectstars: kinematics and dynamics
dc.titleThe White Dwarf Binary Pathways Survey -III. Contamination from hierarchical triples containing a white dwarf
dc.typeartículo
dc.volumen494
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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