How expanded ionospheres of Hot Jupiters can prevent escape of radio emission generated by the cyclotron maser instability
| Autor: | Jean-Mathias Grießmeier, Christof Weber, Kristina G. Kislyakova, C. Vocks, I. F. Shaikhislamov, Maxim L. Khodachenko, J. M. Chadney, Helmut Lammer, Wolfgang Macher, H. O. Rucker, Petra Odert |
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| Přispěvatelé: | Space Research Institute of Austrian Academy of Sciences (IWF), Austrian Academy of Sciences (OeAW), Institute of Laser Physics of SB RAS (ILP), Siberian Branch of the Russian Academy of Sciences (SB RAS), School of Physics and Astronomy [Southampton], University of Southampton, Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Commission for Astronomy of the Austrian Academy of Sciences, Leibniz-Institut für Astrophysik Potsdam (AIP) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
radio continuum: planetary systems
planets and satellites: detection 010504 meteorology & atmospheric sciences Gas giant Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences 7. Clean energy Planet 0103 physical sciences Hot Jupiter planet-star interactions Astrophysics::Solar and Stellar Astrophysics planet-star interactions – planets and satellites: detection – radio continuum: planetary 010303 astronomy & astrophysics planets and satellites: aurorae – planets and satellites: magnetic fields – 0105 earth and related environmental sciences Planetary migration Physics Earth and Planetary Astrophysics (astro-ph.EP) [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Astronomy Astronomy and Astrophysics Planetary system Exoplanet planets and satellites: magnetic fields planets and satellites: aurorae 13. Climate action Space and Planetary Science [SDU]Sciences of the Universe [physics] Physics::Space Physics Terrestrial planet systems Astrophysics::Earth and Planetary Astrophysics Radio wave Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 469 (3), pp.3505-3517. ⟨10.1093/mnras/stx1099⟩ |
| ISSN: | 0035-8711 1365-2966 |
| Popis: | International audience; We present a study of plasma conditions in the atmospheres of the Hot Jupiters HD 209458b and HD 189733b and for an HD 209458b like planet at orbit locations between 0.2 and 1 au around a Sun-like star. We discuss how these conditions influence the radio emission we expect from their magnetospheres. We find that the environmental conditions are such that the cyclotron maser instability (CMI), the process responsible for the generation of radio waves at magnetic planets in the Solar system, most likely will not operate at Hot Jupiters. Hydrodynamically expanding atmospheres possess extended ionospheres whose plasma densities within the magnetosphere are so large that the plasma frequency is much higher than the cyclotron frequency, which contradicts the condition for the production of radio emission and prevents the escape of radio waves from close-in exoplanets at distances |
| Databáze: | OpenAIRE |
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