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  3. Can radio emission escape from the magnetosphere of υ Andromedae b - a new method to constrain the minimum mass of Hot Jupiters

Can radio emission escape from the magnetosphere of υ Andromedae b - a new method to constrain the minimum mass of Hot Jupiters

Описание

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1093/mnras/stac767

Ключевые слова: planet-star interactions, planets and satellites: atmospheres, planets and satellites: aurorae, planets and satellites: detection, planets and satellites: magnetic fields, radio continuum: planetary systems

Аннотация: We investigate the atmospheric and magnetospheric conditions of the massive, close-in exoplanet υ Andromedae b (hereafter ups And b). In particular, we explore whether radio emission can be produced by the Cyclotron Maser Instability (CMI), and whether this emission can escape from its source region. For this, we compare the local Показать полностьюcyclotron frequency to the local plasma frequency. The planetary mass has a decisive impact on both of these frequencies: the cyclotron frequency depends on the (mass-dependent) estimate of the planetary magnetic moment, and the plasma frequency is determined by the (gravity-dependent) atmospheric profile. For this reason, the planetary mass is one of the decisive parameters determining whether the CMI can operate efficiently. As the precise planetary mass is unknown in the case of ups And b, we compare the plasma conditions for a range of hypothetical masses of the planet in order to determine at which mass the atmosphere becomes 'compact', i.e. is not strongly extended, and thus provides favourable conditions for the CMI. In the case of detected planetary radio emission, this approach can provide a new way to constrain the mass of an exoplanet for which only a minimum mass is known. © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

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Издание

Журнал: Monthly Notices of the Royal Astronomical Society

Выпуск журнала: Vol. 512, Is. 4

Номера страниц: 4869-4876

ISSN журнала: 00358711

Издатель: Oxford University Press

Персоны

  • Erkaev N.V. (The Applied Mechanics Department, Siberian Federal University, Krasnoyarsk, 660074, Russian Federation, Institute of Computational Modelling, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation, Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation)
  • Weber C. (Space Research Institute, Austrian Academy of Sciences, Schmiedlstr 6, Graz, A-8042, Austria)
  • Grießmeier J.-M. (LPC2E, Université d'Orléans / CNRS, cedex 2, Orléans, F-45071, France, Station de Radioastronomie de Nançay, Observatoire de Paris, PSL Research University, CNRS, Univ. Orléans, OSUC, NançayF-18330, France)
  • Lammer H. (Space Research Institute, Austrian Academy of Sciences, Schmiedlstr 6, Graz, A-8042, Austria)
  • Ivanov V.A. (The Applied Mechanics Department, Siberian Federal University, Krasnoyarsk, 660074, Russian Federation, Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation)
  • Odert P. (Institute of Physics/IGAM, University of Graz, Universitätsplatz 5, Graz, A-8010, Austria)

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