• Login
    View Item 
    •   DSpace Home
    • INVESTIGACIÓN ACADÉMICA
    • Facultad de Ciencias Exactas
    • FCE - Artículos de Revista
    • View Item
    •   DSpace Home
    • INVESTIGACIÓN ACADÉMICA
    • Facultad de Ciencias Exactas
    • FCE - Artículos de Revista
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

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

    Thumbnail
    View/Open
    TEXTO COMPLETO INGLES (2.483Mb)
    Date
    2016-11
    Author
    Rodigas, T.J.
    Bergeron, P.
    Simon, A.
    Arriagada, P.
    Faherty, J.K.
    Anglada-Escudé, G.
    Mamajek, E.E.
    Weinberger, A.
    Butler, R.P.
    Males, J.R.
    Morzinski, K.
    Close, L.M.
    Hinz, P.M.
    Bailey, J.
    Carter, B.
    Jenkins, J.S.
    Jones, H.
    O'Toole, S.
    Tinney, C.G.
    Wittenmyer, R.
    Debes, J.
    Metadata
    Show full item record
    Abstract
    HD 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.
    URI
    http://repositorio.unab.cl/xmlui/handle/ria/3976
    Collections
    • FCE - Artículos de Revista

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Documentos Trabajos de TitulaciónProcedimientos de publicaciónDerecho de autorGuía para Trabajos de Titulación pre y post gradoFormulario de AutorizaciónLogo Institucional

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV