PLANET HUNTERS: A TRANSITING CIRCUMBINARY PLANET IN A QUADRUPLE STAR SYSTEM
By M. Schwamb, J. Orosz, J. Carter, W. Welsh, Debra A. Fischer, G. Torres, Andrew W. Howard, J. Crepp, William Keel, Chris J. Lintott and 10 more. 2012
189 citations recorded by the source corpus.
We report the discovery and confirmation of a transiting circumbinary planet (PH1b) around KIC 4862625, an eclipsing binary in the Kepler field. The planet was discovered by volunteers searching the first six Quarters of publicly available Kepler data as part of the Planet Hunters citizen science project. Transits of the planet across the larger and brighter of the eclipsing stars are detectable by visual inspection every ∼137 days, with seven transits identified in Quarters 1–11. The physical and orbital parameters of both the host stars and planet were obtained via a photometric-dynamical model, simultaneously fitting both the measured radial velocities and the Kepler light curve of KIC 4862625. The 6.18 ± 0.17 R⊕ planet orbits outside the 20 day orbit of an eclipsing binary consisting of an F dwarf (1.734 ± 0.044 R☉, 1.528 ± 0.087 M☉) and M dwarf (0.378 ± 0.023 R☉, 0.408 ± 0.024 M☉). For the planet, we find an upper mass limit of 169 M⊕ (0.531 Jupiter masses) at the 99.7% confidence level. With a radius and mass less than that of Jupiter, PH1b is well within the planetary regime. Outside the planet's orbit, at ∼1000 AU, a previously unknown visual binary has been identified that is likely bound to the planetary system, making this the first known case of a quadruple star system with a transiting planet.
Subfields: Astronomy and Astrophysics, Education, Instrumentation
View Paper: https://www.semanticscholar.org/paper/a304af05c593aa339110d4d70f80dcc26d4f4488
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Citations in the corpus
- KEPLER-413B: A SLIGHTLY MISALIGNED, NEPTUNE-SIZE TRANSITING CIRCUMBINARY PLANET (2014, background): “Six more transiting CBPs, including a multi-planet system, a CBP in the habitable zone, and a quadruple host stellar system, have been reported since (Welsh et al. 2012; Orosz et al. 2012a,b; Kostov et al. 2013; Schwamb et al. 2013).”
- The Eccentric Kozai-Lidov Effect and Its Applications (2016, background): “ers (Dawson and Chiang 2014). Recently, the Kepler mission detected several circumbinary planetary systems (Doyle et al. 2011; Orosz et al. 2012b,a; Welsh et al. 2012, 2015; Kostov et al. 2013, 2014; Schwamb et al. 2013). These systems are composed of a stellar binary on an orbit with a typical peri”
- A comprehensive study of the Kepler triples via eclipse timing (2015, methodology): “Ten transiting circumbinary planets have been previously reported (Doyle et al. 2011; Welsh et al. 2012; Orosz et al. 2012a,b; Schwamb et al. 2013; Kostov et al. 2013, 2014; Welsh et al. 2015).”
- Planet Hunters IX. KIC 8462852-where's the flux? (2015, background): “The Planet Hunters project has now discovered almost a hundred exoplanet candidates, including several confirmed systems (Fischer et al. 2012; Lintott et al. 2013; Schwamb et al. 2013; Wang et al. 2013; Schmitt et al. 2014).”