Hunting down white dwarf-main sequence binaries using multiwavelength observations

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dc.contributor.authorNayak, Prasanta K.
dc.contributor.authorGanguly, Anindya
dc.contributor.authorChatterjee, Sourav
dc.date.accessioned2025-01-20T17:07:43Z
dc.date.available2025-01-20T17:07:43Z
dc.date.issued2024
dc.description.abstractIdentification of white dwarfs (WD) with main-sequence (MS) companions and characterization of their properties can put important constraints on our understanding of binary stellar evolution and guide the theoretical predictions for a wide range of interesting transient events relevant for, e.g., Rubin Observatory (LSST), ZTF, and LISA. In this study, we combine ultraviolet (UV) and optical color-magnitude diagrams (CMDs) to identify unresolved WD--MS binaries. In particular, we combine high-precision astrometric and photometric data in the optical from Gaia-DR3 and UV data from GALEX GR6/7 to identify 93 WD--MS candidates within 100 pc. Of these, 80 are newly identified. Using the Virtual Observatory SED Analyzer (VOSA) we fit the spectral energy distributions (SEDs) of all our candidates and derive stellar parameters, such as effective temperature, bolometric luminosity, and radius for both companions. We find that our identification method helps identify hotter and smaller WD companions (majority with >= 10,000 K and <= 0.02 R-circle dot) relative to the WDs identified by past surveys. We infer that these WDs are relatively more massive (median similar to 0.76M(circle dot)). We find that most of the MS companions in our binaries are of the K and M spectral types
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad3580
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad3580
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90886
dc.identifier.wosidWOS:001116922000009
dc.issue.numero3
dc.language.isoen
dc.pagina.final6109
dc.pagina.inicio6100
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectvirtual observatory tools
dc.subjectbinaries: general
dc.subjectHertzsprung-Russell and colour-magnitude diagrams
dc.subjectwhite dwarfs
dc.subjectsolar neighbourhood
dc.titleHunting down white dwarf-main sequence binaries using multiwavelength observations
dc.typeartículo
dc.volumen527
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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