EDP Sciences
Press Release
Free access
Volume 493, Number 2, January II 2009
Page(s) L31 - L34
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200811268
Published online 04 December 2008

A&A 493, L31-L34 (2009)
DOI: 10.1051/0004-6361:200811268


Ground-based secondary eclipse detection of the very-hot Jupiter OGLE-TR-56b

D. K. Sing1 and M. López-Morales2

1  Institut d'Astrophysique de Paris, CNRS/UPMC, 98bis boulevard Arago, 75014 Paris, France
    e-mail: sing@iap.fr
2  Carnegie Institution of Washington, Dept. of Terrestrial Magnetism, 5241 Broad Branch Road NW, Washington, DC 20015, USA
    e-mail: mercedes@dtm.ciw.edu

Received 31 October 2008 / Accepted 21 November 2008

We report on the detection of the secondary eclipse of the very-hot Jupiter OGLE-TR-56b from combined z'-band time series photometry obtained with the VLT and Magellan telescopes. We measure a flux decrement of 0.0363 $\pm$ 0.0091% from the combined Magellan and VLT datasets, which indicates a blackbody brightness temperature of 2718+127-107 K, a very low albedo, and a small incident radiation redistribution factor, indicating a lack of strong winds in the planet's atmosphere. The measured secondary depth is consistent with thermal emission, but our precision is not sufficient to distinguish between a black-body emitting planet, or emission as predicted by models with strong optical absorbers such as TiO/VO. This is the first time that thermal emission from an extrasolar planet is detected at optical wavelengths and with ground-based telescopes.

Key words: binaries: eclipsing -- planetary systems -- stars: individual: OGLE-TR-56 -- techniques: photometric

© ESO 2009

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.