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Extrasolar planets and brown dwarfs around A-F type stars - VII. Theta Cygni radial velocity variations: planets or stellar phenomenon?
M. Desort, A. -M. Lagrange, F. Galland +23
(abridged) In the frame of the search for extrasolar planets and brown dwarfs around early-type main-sequence stars, we present the results obtained on the early F-type star Theta…
Transit spectrophotometry of the exoplanet HD189733b. I. Searching for water but finding haze with HST NICMOS
David K. Sing, J. -M. Desert, A. Lecavelier des Etangs +5
We present Hubble Space Telescope near-infrared transit photometry of the nearby hot-Jupiter HD189733b. The observations were taken with the NICMOS instrument during five transits,…
Spin-orbit misalignment in the HD80606 planetary system
F. Pont, G. Hebrard, J. M. Irwin +5
We recently reported the photometric and spectroscopic detection of the primary transit of the 111-day-period, eccentric extra-solar planet HD80606 b, at Observatoire de Haute-Prov…
New Magellanic Cloud R Coronae Borealis and DY Per type stars from the EROS-2 database: the connection between RCBs, DYPers and ordinary carbon stars
P. Tisserand, P. R. Wood, J. B. Marquette +29
R Coronae Borealis stars (RCB) are a rare type of evolved carbon-rich supergiant stars that are increasingly thought to result from the merger of two white dwarfs, called the Doubl…
Search for Carbon Monoxide in the atmosphere of the Transiting Exoplanet HD189733b
Jean-Michel Desert, Alain Lecavelier des Etangs, Guillaume Hebrard +4
Water, methane and carbon-monoxide are expected to be among the most abundant molecules besides molecular hydrogen in the hot atmosphere of close-in EGPs. Transit observations in t…
Is Beta Pic b the transiting planet of November 1981?
A. Lecavelier des Etangs, A. Vidal-Madjar
In 1981, Beta Pictoris showed strong and rapid photometric variations that were attributed to the transit of a giant comet or a planet orbiting at several AUs (Lecavelier des Etang…