A Jovian analogue orbiting a white dwarf star

Abstract

Studies have shown that remnants of destroyed planets and debris-disk planetesimals can survive the volatile evolution of their host stars into white dwarfs, but detection of intact planetary bodies around white dwarfs are few. Simulations predict that planets in Jupiter-like orbits around stars of $<8M_{\odot }$ avoid being destroyed by the strong tidal forces of their stellar host, but as yet there has been no observational confirmation of such a survivor. Here we report on the non-detection of a main-sequence lens star in the microlensing event MOA-2010-BLG-477Lb using near-infrared observations from the Keck Observatory. We determine this system contains a $0.53\pm 0.11$ solar mass white dwarf host orbited by a $1.4\pm 0.3$ Jupiter mass planet with a separation on the plane of the sky of $2.8\pm 0.5$ AU, which implies a semi-major axis larger than this. This system is evidence that planets around white dwarfs can survive the giant and asymptotic giant phases of their host's evolution, and supports the prediction that over half of white dwarfs are predicted to have Jovian planetary companions. Located at approximately 2.0 kpc toward the center of our Galaxy, it likely represents an analog to the end stages of the Sun and Jupiter in our own Solar System.

15 pages, 10 figures

References in corpus (12)

• Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
• Foretellings of Ragnarök: World-engulfing Asymptotic Giants and the Inheritance of White Dwarfs
• A Giant Planet Candidate Transiting a White Dwarf
• A planetesimal orbiting within the debris disc around a white dwarf star
• Accretion of a giant planet onto a white dwarf
• First Space-Based Microlens Parallax Measurement: Spitzer Observations of OGLE-2005-SMC-001
• The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
• A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary
• Planetary and Other Short Binary Microlensing Events from the MOA Short Event Analysis
• The Effect of Tides on the Population of PN from Interacting Binaries
• Cold giant planets evaporated by hot white dwarfs
• Empirical Study of Simulated Two-planet Microlensing Event

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• Birth cluster simulations of planetary systems with multiple super-Earths: initial conditions for white dwarf pollution drivers
• Disentangling the parameter space: The role of planet multiplicity in triggering dynamical instabilities on planetary systems around white dwarfs
• An emerging and enigmatic spectral class of isolated DAe white dwarfs
• High-resolution resonant portraits of a single-planet white dwarf system
• Confirmation of Color Dependent Centroid Shift Measured After 1.8 years with HST
• An Imaging Search for Post-Main-Sequence Planets of Sirius B
• Synthetic X-ray emission from white dwarf accreting planetary material