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dc.contributor.authorRodigas, Timothy J.
dc.contributor.authorBergeron, P.
dc.contributor.authorSimon, Amelie
dc.contributor.authorArriagada, Pamela
dc.contributor.authorFaherty, Jackie
dc.contributor.authorAnglada-Escude, Guillem
dc.contributor.authorMamajek, Eric E.
dc.contributor.authorWeinberger, Alycia
dc.contributor.authorButler, R. Paul
dc.contributor.authorMales, Jared R.
dc.contributor.authorMorzinski, Katie
dc.contributor.authorClose, Laird M.
dc.contributor.authorHinz, Philip M.
dc.contributor.authorBailey, Jeremy
dc.contributor.authorCarter, Brad
dc.contributor.authorJenkins, James S.
dc.contributor.authorJones, Hugh
dc.contributor.authorO'Toole, Simon
dc.contributor.authorTinney, C. G.
dc.contributor.authorWittenmyer, Rob
dc.contributor.authorDebes, John
dc.date.accessioned2017-01-13T11:10:33Z
dc.date.available2017-01-13T11:10:33Z
dc.date.issued2016-11-10
dc.identifier.citationRodigas , T J , Bergeron , P , Simon , A , Arriagada , P , Faherty , J , Anglada-Escude , 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 2016 , ' MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112 ' , The Astrophysical Journal , vol. 831 , no. 177 . https://doi.org/10.3847/0004-637X/831/2/177
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 10504479
dc.identifier.otherPURE UUID: 07260317-813c-40d2-bbae-53fd38727218
dc.identifier.otherArXiv: http://arxiv.org/abs/1609.02576v1
dc.identifier.otherScopus: 84994495734
dc.identifier.urihttp://hdl.handle.net/2299/17509
dc.descriptionThe version of record, Rodigas, T. J. et al, 'MagAO Imaging of long-period objects (MILO). II. A puzzling white dwarf around the sun-like star HD 11112', The Astrophysical Journal, 831:177, November 2016, is available online via doi: 10.3847/0004-637X/831/2/177 © 2016. The American Astronomical Society. All rights reserved.
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\fasec 2 (100 AU) at multiple wavelengths spanning 0.6-4 \microns ~and show that it is most likely a gravitationally-bound cool white dwarf. Modeling its spectral energy distribution (SED) suggests that its mass is 0.9-1.1 \msun, which corresponds to very high-eccentricity, near edge-on orbits from Markov chain Monte Carlo analysis of the RV and imaging data together. The total age of the white dwarf is $>2\sigma$ 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.en
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subjectastro-ph.EP
dc.subjectastro-ph.SR
dc.titleMagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/0004-637X/831/2/177
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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