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Interpretations of WASP-12b Near-UV Observations

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Characterizing Stellar and Exoplanetary Environments

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 411))

Abstract

The near-UV observations of the hot-Jupiter WASP-12b obtained by Fossati et al. have revealed the presence of an asymmetric transit lightcurve that is both more pronounced in the near-UV and starts at an earlier time than the optical lightcurve . These features of the near-UV transit of WASP-12b have intrigued several modellers. In this Chapter, we review the different interpretations of the near-UV observations of the system.

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Notes

  1. 1.

    The Knudsen number is defined as: \(\mathit{Kn} = \lambda /H\), where λ is the mean free path, equal to 1∕(n ×σ) where n is the number density and σ is the cross-section, \(\sigma = 10^{-15}\,\mathrm{cm}^{2}\), and H is a typical scale of the solution \(H = n/(\mathit{dn}/\mathit{dr})\).

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Acknowledgements

The authors acknowledge the support by the International Space Science Institute (ISSI) in Bern, Switzerland and the ISSI team Characterizing stellar- and exoplanetary environments. A. A. Vidotto acknowledges also the support from a Royal Astronomical Society Fellowship and from an Ambizione fellowship of the Swiss National Science Foundation.

Author information

Authors and Affiliations

  1. SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, KY16 9SS, St Andrews, UK

    Aline A. Vidotto

  2. Observatoire de Genève, Université de Genève, Ch. des Maillettes 51, Versoix, CH-1290, Switzerland

    Aline A. Vidotto

  3. Russian Academy of Sciences, Institute of Astronomy, Moscow, Russian Federation

    Dmitry V. Bisikalo

  4. Argelander-Institut für Astronomie der Universität Bonn, Auf dem Hügel 71, 53121, Bonn, Germany

    Luca Fossati

  5. Lowell Observatory, 1400 W Mars Hill Rd, Flagstaff, Arizona, 86001, USA

    Joe Llama

Authors
  1. Aline A. Vidotto
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  2. Dmitry V. Bisikalo
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  3. Luca Fossati
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  4. Joe Llama
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Corresponding author

Correspondence to Aline A. Vidotto .

Editor information

Editors and Affiliations

  1. Space Research Institute, Austrian Academy of Sciences, Graz, Austria

    Helmut Lammer

  2. Space Research Institute, Austrian Academy of Sciences, Graz, Austria

    Maxim Khodachenko

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Vidotto, A.A., Bisikalo, D.V., Fossati, L., Llama, J. (2015). Interpretations of WASP-12b Near-UV Observations. In: Lammer, H., Khodachenko, M. (eds) Characterizing Stellar and Exoplanetary Environments. Astrophysics and Space Science Library, vol 411. Springer, Cham. https://doi.org/10.1007/978-3-319-09749-7_8

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