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Tau Boo is an intriguing planet-host star that is believed to undergo magnetic cycles similar to the Sun, but with a duration that is about one order of magnitude smaller than that of the solar cycle. With the use of observationally derived…

Solar and Stellar Astrophysics · Physics 2015-06-04 A. A. Vidotto , R. Fares , M. Jardine , J. F. Donati , M. Opher , C. Moutou , C. Catala , T. I. Gombosi

Studying the magnetic fields of exoplanets will provide valuable information about their interior structures, atmospheric properties (escape and dynamics), and potential habitability. One of the most promising methods to detect exoplanetary…

Detection of electron cyclotron maser (ECM) emission from exoplanets in the 10-40 MHz radio band is likely the only way to measure an exoplanet's magnetic field directly. However, no definitive detection of exoplanetary ECM emission has…

Earth and Planetary Astrophysics · Physics 2025-01-14 C. M. Cordun , H. K. Vedantham , M. A. Brentjens , F. F. S. van der Tak

The magnetospheric emissions from extrasolar planets represent a science frontier for the next decade. All of the solar system giant planets and the Earth produce radio emissions as a result of interactions between their magnetic fields and…

The detection of radio emission from an exoplanet would constitute the best way to determine its magnetic field. Indeed, the presence of a planetary magnetic field is a necessary condition for radio emission via the Cyclotron Maser…

Earth and Planetary Astrophysics · Physics 2023-12-08 Jean-Mathias Grießmeier , N. V. Erkaev , C. Weber , H. Lammer , V. A. Ivanov , P. Odert

Hot Jupiters have been proposed as a likely population of low frequency radio sources due to electron cyclotron maser emission of similar nature to that detected from the auroral regions of magnetized solar system planets. Such emission…

Earth and Planetary Astrophysics · Physics 2015-06-11 G. Hallinan , S. K. Sirothia , A. Antonova , C. H. Ishwara-Chandra , S. Bourke , J. G. Doyle , J. Hartman , A. Golden

We predict the radio flux densities of the extrasolar planets in the current census, making use of an empirical relation--the radiometric Bode's Law--determined from the five ``magnetic'' planets in the solar system (Earth and the four gas…

This paper reports a blind search for magnetospheric emissions from planets around nearby stars. Young stars are likely to have much stronger stellar winds than the Sun, and because planetary magnetospheric emissions are powered by stellar…

Earth and Planetary Astrophysics · Physics 2015-05-14 T. Joseph W. Lazio , S. Carmichael , J. Clark , E. Elkins , P. Gudmundsen , Z. Mott , M. Szwajkowski , L. A. Hennig

Magnetized exoplanets are expected to emit auroral cyclotron radiation in the radio regime due to the interactions between their magnetospheres, the interplanetary magnetic field, and the stellar wind. Prospective extrasolar auroral…

Earth and Planetary Astrophysics · Physics 2025-08-14 Asaf Kaya , Tansu Daylan

Like the magnetised planets in our Solar System, magnetised exoplanets should emit strongly at radio wavelengths. Radio emission directly traces the planetary magnetic fields and radio detections can place constraints on the physical…

Earth and Planetary Astrophysics · Physics 2018-05-03 C. R. Lynch , Tara Murphy , E. Lenc , D. L. Kaplan

Context: It has been speculated for many years that some extrasolar planets may emit strong cyclotron emission at low radio frequencies in the range 10-100 MHz. Despite several attempts no such emission has yet been seen. Aims: The hot…

Earth and Planetary Astrophysics · Physics 2015-06-11 A. Stroe , I. A. G. Snellen , H. J. A. Rottgering

The majority of searches for radio emission from exoplanets have to date focused on short period planets, i.e., the so-called hot Jupiter type planets. However, these planets are likely to be tidally locked to their host stars and may not…

Earth and Planetary Astrophysics · Physics 2018-05-02 Eamon O'Gorman , Colm P. Coughlan , Wouter Vlemmings , Eskil Varenius , Sandeep Sirothia , Tom P. Ray , Hans Olofsson

All the giant planets in the solar system generate radio emission via the electron cyclotron maser instability, most notably giving rise to Jupiter's decametric emissions. An interaction with the solar wind is at least partially responsible…

Earth and Planetary Astrophysics · Physics 2021-01-04 F. de Gasperin , T. J. W. Lazio , M. Knapp

By analogy to Jovian radio emissions powered by the electromagnetic interaction between Jupiter and its moons, we propose that close magnetic-nonmagnetic white-dwarf pairs and white-dwarf planetary systems are strong radio sources. A simple…

Astrophysics · Physics 2009-11-07 Andrew J. Willes , Kinwah Wu

We study the non-thermal emission from the interaction between magnetized Jupiter-like exoplanets and the wind from their host star. The supersonic motion of planets through the wind forms a bow shock that accelerates electrons which…

Earth and Planetary Astrophysics · Physics 2019-04-10 Xiawei Wang , Abraham Loeb

Magnetised exoplanets are expected to emit at radio frequencies analogously to the radio auroral emission of Earth and Jupiter. We predict the radio emission from V830 Tau b, the youngest (2 Myr) detected exoplanet to date. We model the…

Solar and Stellar Astrophysics · Physics 2017-06-07 A. A. Vidotto , J. -F. Donati

We use high dynamic range, high-resolution L-band spectroscopy to measure the radial velocity variations of the hot Jupiter in the tau Bootis planetary system. The detection of an exoplanet by the shift in the stellar spectrum alone…

Context. Observing the radio emission from exoplanets is among the most promising methods to detect their magnetic fields and a measurement of an exoplanetary magnetic field will help constrain the planet's interior structure, star-planet…

Earth and Planetary Astrophysics · Physics 2024-08-07 Jake D. Turner , Jean-Mathias Grießmeier , Philippe Zarka , Xiang Zhang , Emilie Mauduit

The search for exoplanetary radio emission has resulted in zero conclusive detections to date. Various explanations for this have been proposed, from the observed frequency range, telescope sensitivity, to beaming of the emission. In a…

Solar and Stellar Astrophysics · Physics 2020-02-19 R. D. Kavanagh , A. A. Vidotto

Detection of radio emission from Jupiter was identified quickly as being due to its planetary-scale magnetic field. Subsequent spacecraft investigations have revealed that many of the planets, and even some moons, either have or have had…

Earth and Planetary Astrophysics · Physics 2024-06-25 T. Joseph W. Lazio
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