MagAO IMAGING OF LONG-PERIOD OBJECTS (MILO). II. A PUZZLING WHITE DWARF AROUND THE SUN-LIKE STAR HD 11112

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dc.contributor.authorRodigas, T.J.
dc.contributor.authorBergeron, P.
dc.contributor.authorSimon, A.
dc.contributor.authorArriagada, P.
dc.contributor.authorFaherty, J.K.
dc.contributor.authorAnglada-Escudé, G.
dc.contributor.authorMamajek, E.E.
dc.contributor.authorWeinberger, A.
dc.contributor.authorButler, R.P.
dc.contributor.authorMales, J.R.
dc.contributor.authorMorzinski, K.
dc.contributor.authorClose, L.M.
dc.contributor.authorHinz, P.M.
dc.contributor.authorBailey, J.
dc.contributor.authorCarter, B.
dc.contributor.authorJenkins, J.S.
dc.contributor.authorJones, H.
dc.contributor.authorO'Toole, S.
dc.contributor.authorTinney, C.G.
dc.contributor.authorWittenmyer, R.
dc.contributor.authorDebes, J.
dc.date.accessioned2017-08-18T18:20:45Z
dc.date.available2017-08-18T18:20:45Z
dc.date.issued2016-11
dc.descriptionIndexación: Web of Science; Scopus.es_CL
dc.description.abstractHD 11112 is an old, Sun-like star that has a long-term radial velocity (RV) trend indicative of a massive companion on a wide orbit. Here we present direct images of the source responsible for the trend using the Magellan Adaptive Optics system. We detect the object (HD 11112B) at a separation of 2 2 (100 au) at multiple wavelengths spanning 0.6-4 mu m. and show that it is most likely a gravitationally bound cool white dwarf. Modeling its spectral energy distribution suggests that its mass is 0.9-1.1M(circle dot), which corresponds to very high eccentricity, near edge-on orbits from a. Markov chain Monte Carlo analysis of the RV and imaging data together. The total age of the white dwarf is > 2 sigma, which is discrepant with that of the primary star under most assumptions. The problem can be resolved if the white dwarf progenitor was initially a double white dwarf binary that then merged into the observed high-mass white dwarf. HD 11112B is a unique and intriguing benchmark object that can be used to calibrate atmospheric and evolutionary models of cool white dwarfs and should thus continue to be monitored by RV and direct imaging over the coming years.es_CL
dc.description.urihttp://iopscience.iop.org/article/10.3847/0004-637X/831/2/177/meta
dc.identifier.citationAstrophysical Journal Volume 831, Issue 2, 10 November 2016, Article number 177es_CL
dc.identifier.issn0004-637X
dc.identifier.otherDOI: 10.3847/0004-637X/831/2/177
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/3976
dc.language.isoenes_CL
dc.publisherIOP PUBLISHINGes_CL
dc.subjectBinarieses_CL
dc.subjectInstrumentation: adaptive opticses_CL
dc.subjectStars: individual (HD 11112)es_CL
dc.subjectTechniques: high angular resolutiones_CL
dc.subjectTechniques: radial velocitieses_CL
dc.subjectWhite dwarfses_CL
dc.titleMagAO IMAGING OF LONG-PERIOD OBJECTS (MILO). II. A PUZZLING WHITE DWARF AROUND THE SUN-LIKE STAR HD 11112es_CL
dc.typeArtículoes_CL
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