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MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112. / Rodigas, Timothy J.; Bergeron, P.; Simon, Amelie; Arriagada, Pamela; Faherty, Jackie; Anglada-Escude, Guillem; Mamajek, Eric E.; Weinberger, Alycia; Butler, R. Paul; Males, Jared R.; Morzinski, Katie; Close, Laird M.; Hinz, Philip M.; Bailey, Jeremy; Carter, Brad; Jenkins, James S.; Jones, Hugh; O'Toole, Simon; Tinney, C. G.; Wittenmyer, Rob; Debes, John.

In: The Astrophysical Journal, Vol. 831, No. 177, 10.11.2016.

Research output: Contribution to journalArticlepeer-review

Harvard

Rodigas, TJ, Bergeron, P, Simon, A, Arriagada, P, Faherty, J, Anglada-Escude, G, Mamajek, EE, Weinberger, A, Butler, RP, Males, JR, Morzinski, K, Close, LM, Hinz, PM, Bailey, J, Carter, B, Jenkins, JS, Jones, H, O'Toole, S, Tinney, CG, 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

APA

Rodigas, 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., ... 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, 831(177). https://doi.org/10.3847/0004-637X/831/2/177

Vancouver

Author

Rodigas, Timothy J. ; Bergeron, P. ; Simon, Amelie ; Arriagada, Pamela ; Faherty, Jackie ; Anglada-Escude, Guillem ; Mamajek, Eric E. ; Weinberger, Alycia ; Butler, R. Paul ; Males, Jared R. ; Morzinski, Katie ; Close, Laird M. ; Hinz, Philip M. ; Bailey, Jeremy ; Carter, Brad ; Jenkins, James S. ; Jones, Hugh ; O'Toole, Simon ; Tinney, C. G. ; Wittenmyer, Rob ; Debes, John. / MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112. In: The Astrophysical Journal. 2016 ; Vol. 831, No. 177.

Bibtex

@article{07260317813c40d2bbae53fd38727218,
title = "MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112",
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\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.",
keywords = "astro-ph.EP, astro-ph.SR",
author = "Rodigas, {Timothy J.} and P. Bergeron and Amelie Simon and Pamela Arriagada and Jackie Faherty and Guillem Anglada-Escude and Mamajek, {Eric E.} and Alycia Weinberger and Butler, {R. Paul} and Males, {Jared R.} and Katie Morzinski and Close, {Laird M.} and Hinz, {Philip M.} and Jeremy Bailey and Brad Carter and Jenkins, {James S.} and Hugh Jones and Simon O'Toole and Tinney, {C. G.} and Rob Wittenmyer and John Debes",
note = "The 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 {\textcopyright} 2016. The American Astronomical Society. All rights reserved.",
year = "2016",
month = nov,
day = "10",
doi = "10.3847/0004-637X/831/2/177",
language = "English",
volume = "831",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "177",

}

RIS

TY - JOUR

T1 - MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112

AU - Rodigas, Timothy J.

AU - Bergeron, P.

AU - Simon, Amelie

AU - Arriagada, Pamela

AU - Faherty, Jackie

AU - Anglada-Escude, Guillem

AU - Mamajek, Eric E.

AU - Weinberger, Alycia

AU - Butler, R. Paul

AU - Males, Jared R.

AU - Morzinski, Katie

AU - Close, Laird M.

AU - Hinz, Philip M.

AU - Bailey, Jeremy

AU - Carter, Brad

AU - Jenkins, James S.

AU - Jones, Hugh

AU - O'Toole, Simon

AU - Tinney, C. G.

AU - Wittenmyer, Rob

AU - Debes, John

N1 - The 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.

PY - 2016/11/10

Y1 - 2016/11/10

N2 - 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\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.

AB - 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\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.

KW - astro-ph.EP

KW - astro-ph.SR

U2 - 10.3847/0004-637X/831/2/177

DO - 10.3847/0004-637X/831/2/177

M3 - Article

VL - 831

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 177

ER -