EDP Sciences
Free access
Volume 371, Number 1, May III 2001
Page(s) 260 - 266
Section Formation and evolution of planetary systems
DOI http://dx.doi.org/10.1051/0004-6361:20010406

A&A 371, 260-266 (2001)
DOI: 10.1051/0004-6361:20010406

Search for spectroscopical signatures of transiting HD 209458b's exosphere

C. Moutou1, A. Coustenis2, J. Schneider2, R. St Gilles2, M. Mayor3, D. Queloz3 and A. Kaufer1

1  ESO, Alonso de Cordova 3107, Santiago de Chile
    e-mail: akaufer@eso.org
2  Observatoire de Paris Meudon, 92195 Meudon Cedex, France
    e-mail: Athena.Coustenis@obspm.fr, Jean.Schneider@obspm.fr, Richard.Saint-Gilles@obspm.fr
3  Observatoire de Genève, Switzerland
    e-mail: michel.mayor@obs.unige.ch, didier.queloz@obs.unige.ch

(Received 13 November 2000 / Accepted 18 January 2001 )

Following recent attempts to detect the exosphere of the extra-solar planet 51 Pegb in the infrared (Coustenis et al. 1997, 1998; Rauer et al. 2000a), we discuss here a search for optical spectroscopic signatures from a gaseous extended envelope (called exosphere) surrounding the planet HD 209458b. This planet has a demonstrated photometric transit (Charbonneau et al. 2000a; Henry et al. 2000), thus offering an increased probability for the spectroscopic detection of such an envelope. Therefore it is the best known candidate for probing the exospheric composition of a giant planet, orbiting a Sun-like star at a short distance. The observations were performed with UVES at the VLT and cover most of the 328-669 nm range. We did not detect HD 209458b's exosphere at a level of 1% , a value close to the predictions. We discuss here the first results obtained and their limitations, as well as future prospective.

Key words: techniques: spectroscopic -- stars: atmosphere -- stars: planetary systems

Offprint request: C. Moutou, cmoutou@eso.org

SIMBAD Objects

© ESO 2001

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.