Predicting low-frequency radio fluxes of known extrasolar planets

By J. Grießmeier, Philippe Zarka, H. S. Lesia, O. Paris, Meudon, France., Astronomical InstituteAnton Pannekoek'', Amsterdam, The Netherlands.. 2007

138 citations recorded by the source corpus.

Context: Close-in giant extrasolar planets (``Hot Jupiters'') are believed to be strong emitters in the decametric radio range. Aims: We present the expected characteristics of the low-frequency magnetospheric radio emission of all currently known extrasolar planets, including the maximum emission frequency and the expected radio flux. We also discuss the escape of exoplanetary radio emission from the vicinity of its source, which imposes additional constraints on detectability. Methods: We compare the different predictions obtained with all four existing analytical models for all currently known exoplanets. We also take care to use realistic values for all input parameters. Results: The four different models for planetary radio emission lead to very different results. The largest fluxes are found for the magnetic energy model, followed by the CME model and the kinetic energy model (for which our results are found to be much less optimistic than those of previous studies). The unipolar interaction model does not predict any observable emission for the present exoplanet census. We also give estimates for the planetary magnetic dipole moment of all currently known extrasolar planets, which will be useful for other studies. Conclusions: Our results show that observations of exoplanetary radio emission are feasible, but that the number of promising targets is not very high. The catalog of targets will be particularly useful for current and future radio observation campaigns (e.g. with the VLA, GMRT, UTR-2 and with LOFAR). Appendices A and B are only available in electronic form at http://www.aanda.org Table 1 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/475/359

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/9ef064b393a3b2567d4847c5e3187d1014479cba

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

Citations in the corpus

Magnetic energy fluxes in sub-Alfvénic planet star and moon planet interactions (2013, methodology): “The magnetic field of the star B can therefore be estimated after Grießmeier et al. (2007) with the relationship B = B P /P using values of the solar magnetic field B = 1.44× 105 nT (Preusse et al. 2006) and the solar rotation period P = 27 days.”
Science with a lunar low-frequency array: From the dark ages of the Universe to nearby exoplanets (2009, methodology): “It has been suggested that this could be used for the detection of the magnetospheres of exoplanets (Lazio et al., 2004; Grießmeier et al., 2005, 2007b), but will certainly also be of interest to investigate solar fles in nearby stars.”
Science with the Murchison Widefield Array (2012, background): “Grießmeier et al. (2007) discuss theoretical expectations for radio emission from known extrasolar planets.”
Searching for star–planet interactions within the magnetosphere of HD 189733 (2010, methodology): “Given the rotation period of 12 d, the stellar age is of ∼ 1.6 Gyr (based on the formalism presented in Grießmeier et al. 2007).”
Back to the Moon: The scientific rationale for resuming lunar surface exploration (2012, background): “exoplanets (Grießmeier et al., 2007); Investigation of the local plasma bubble around our solar system; and Radio-detection of ultra-high energy cosmic rays.”