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arXiv:astro-ph/0509431v115Sep2005 F. Casoli, T. Contini, J.M. Hameury, and L. Pagani (eds)
 

Summary: arXiv:astro-ph/0509431v115Sep2005
SF2A 2005
F. Casoli, T. Contini, J.M. Hameury, and L. Pagani (eds)
ON ARTIFICIAL TRANSITS FEASIBILITY AND SETI
Arnold, Luc1
Abstract. 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 detect the transit of Earth-like planets,
could a fortiori also detect the transit of artificial planet-size objects if their
shape is significantly different from a natural (planetary) object. Multiple
artificial objects would also produce transit light curves easily recognizable
from natural transits. Artificial transits, especially of multiple objects, could
be used for the transmission of clear attention-getting signals, with a sky
coverage (efficiency) comparable to that of the laser pulse method. Although
out of reach of current human technologies, the building of an Earth-size
1Ám thick mask would require energy and bulk material amounts already
managed on Earth today. The migration of the mask toward an inner orbit
and its protection against asteroids or meteoroids are also briefly discussed.
1 Introduction: stellar communication with artificial transits
It is already known that the shape of a planet (its oblateness or the presence of

  

Source: Arnold, Luc - Observatoire de Haute-Provence

 

Collections: Physics