Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-10-17
Mon.Not.Roy.Astron.Soc. 346 (2003) L16
Astronomy and Astrophysics
Astrophysics
5 pages, 5 figures, MNRAS accepted 12 Oct 2003
Scientific paper
10.1046/j.1365-2966.2003.07276.x
We have used a doppler tomographic analysis to conduct a deep search for the starlight reflected from the planetary companion to HD 75289. In 4 nights on VLT2/UVES in January 2003, we obtained 684 high resolution echelle spectra with a total integration time of 26 hours. We establish an upper limit on the planet's geometric albedo p < 0.12 (to the 99.9% significance level) at the most probable orbital inclination i ~ 60 degrees, assuming a grey albedo, a Venus-like phase function and a planetary radius R_p = 1.6 R_Jup. We are able to rule out some combinations of the predicted planetary radius and atmospheric albedo models with high, reflective cloud decks.
Collier Cameron Andrew
Donati Jean-Francois
Horne Keith
James Dionne
Leigh Catherine
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