Deep exploration of $\epsilon$ Eridani with Keck Ms-band vortex coronagraphy and radial velocities: mass and orbital parameters of the giant exoplanet
| Autor: | Elodie Choquet, Dimitri Mawet, Eugene Serabyn, Charles Beichman, Benjamin J. Fulton, Olivier Absil, Geoff Marcy, Tiffany Meshkat, Erik A. Petigura, Ji Wang, Jean-Baptiste Ruffio, Michael Bottom, David R. Ciardi, Maddalena Reggiani, E. Sinukoff, Valentin Christiaens, Marie Ygouf, Elsa Huby, Andrew W. Howard, Rebecca Jensen-Clem, Carlos A. Gomez Gonzalez, Denis Defrere, Brendan P. Bowler, Molly R. Kosiarek, Lauren M. Weiss, Howard Isaacson, Marta L. Bryan, Eve J. Lee, Lea A. Hirsch, Garreth Ruane |
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| Přispěvatelé: | California Institute of Technology (CALTECH), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Earth and Planetary Science [UC Berkeley] (EPS), University of California [Berkeley], University of California-University of California, Stanford University [Stanford], Caltech Department of Astronomy [Pasadena], Infrared Processing and Analysis Center (IPAC), Space Sciences, Technologies and Astrophysics Research Institute (STAR), Université de Liège, NASA ExoPlanet Science Institute (NExScI), McDonald Observatory, University of Texas at Austin [Austin], Universidad de Chili / Departamento de Ciencias de la Computation, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Department of Astronomy and Astrophysics [UCSC Santa Cruz], University of California [Santa Cruz] (UCSC), Université de Montréal [Montréal], Institute for Astronomy [Honolulu], University of Hawai‘i [Mānoa] (UHM), Université de Montréal - UdeM (CANADA), Université de Montréal (UdeM), California Institute of Technology (CALTECH)-NASA, Stanford University, Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
dynamical evolution and stability [planets and satellites]
gaseous planets [planets and satellites] ECCENTRICITY 010504 meteorology & atmospheric sciences Gas giant [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] CHAOTIC ZONE FOS: Physical sciences Astronomy & Astrophysics DEBRIS DISK planetary systems [stars] 01 natural sciences COOL STARS law.invention INSTABILITIES DWARFS law Planet SEARCH 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Coronagraph ComputingMilieux_MISCELLANEOUS Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Orbital elements Physics planet-disk interactions Debris disk Science & Technology high angular resolution [techniques] Astronomy radial velocities [techniques] Astronomy and Astrophysics PLANET FORMATION Planetary system Exoplanet Radial velocity 13. Climate action Space and Planetary Science Physical Sciences Astrophysics::Earth and Planetary Astrophysics SPOCS [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] NEARBY STARS Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Astronomical Journal Astronomical Journal, American Astronomical Society, 2019, 157 (1), pp.33. ⟨10.3847/1538-3881/aaef8a⟩ The Astronomical Journal The Astronomical Journal, American Astronomical Society, 2019, 157 (1), pp.33. ⟨10.3847/1538-3881/aaef8a⟩ |
| ISSN: | 0004-6256 1538-3881 |
| Popis: | We present the most sensitive direct imaging and radial velocity (RV) exploration of $\epsilon$ Eridani to date. $\epsilon$ Eridani is an adolescent planetary system, reminiscent of the early Solar system. It is surrounded by a prominent and complex debris disk which is likely stirred by one or several gas giant exoplanets. The discovery of the RV signature of a giant exoplanet was announced 15 years ago, but has met with scrutiny due to possible confusion with stellar noise. We confirm the planet with a new compilation and analysis of precise RV data spanning 30 years, and combine it with upper limits from our direct imaging search, the most sensitive ever performed. The deep images were taken in the Ms band (4.7$\mu$m) with the vortex coronagraph recently installed in W.M. Keck Observatory's infrared camera NIRC2, which opens a sensitive window for planet searches around nearby adolescent systems. The RV data and direct imaging upper limit maps were combined in an innovative joint Bayesian analysis, providing new constraints on the mass and orbital parameters of the elusive planet. $\epsilon$ Eridani b has a mass of $0.78^{+0.38}_{-0.12}$ $M_{Jup}$ and is orbiting $\epsilon$ Eridani at about $3.48\pm 0.02$ AU with a period of $7.37 \pm 0.07$ years. The eccentricity of $\epsilon$ Eridani b's orbit is $0.07^{+0.06}_{-0.05}$, an order of magnitude smaller than early estimates and consistent with a circular orbit. We discuss our findings from the standpoint of planet-disk interactions and prospects for future detection and characterization with the James Webb Space Telescope. Comment: Accepted to AJ |
| Databáze: | OpenAIRE |
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