172 citations · 1.6k across the 34 of their papers we have counts for
6 papers · 1 filter
Earthshine observation of vegetation and implication for life detection on other planets - A review of 2001 - 2006 works
Luc Arnold
The detection of exolife is one of the goals of very ambitious future space missions that aim to take direct images of Earth-like planets. While associations of simple molecules pr…
Near-UV to near-IR disk-averaged Earth's spectra from Moon's Earthshine observations
S. Hamdani, L. Arnold, C. Foellmi +5
We discuss a series of Earthshine spectra obtained with the NTT/EMMI instrument between 320nm and 1020nm with a resolution of R~450 in the blue and R~250 in the red. These ascendin…
On artificial transits feasibility and SETI
Luc Arnold
It is known that the shape of a planet (oblateness, rings, etc.) slightly modifies the shape of the transit light curve. The forthcoming space missions (Corot, Kepler), able to det…
Transit Lightcurve Signatures of Artificial Objects
Luc Arnold
The forthcoming space missions, able to detect Earth-like planets by the transit method, will a fortiori also be able to detect the transit of artificial planet-size objects. Multi…
A test for the search for life on extrasolar planets: Looking for the terrestrial vegetation signature in the Earthshine spectrum
L. Arnold, S. Gillet, O. Lardiere +2
We report spectroscopic observations (400 to 800nm, R = approx 100) of Earthshine in June, July and October 2001 from which normalised Earth albedo spectra have been derived. The r…
First images on the sky from a hyper telescope
E. Pedretti, A. Labeyrie, L. Arnold +4
We show star images obtained with a miniature ``densified pupil imaging interferometer'' also called a hyper-telescope. The formation of such images violates a ``golden rule of ima…