Reference : Details on DARWIN and the Search for Extrasolar Planets
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Details on DARWIN and the Search for Extrasolar Planets
Kaltenegger, L. [> > > >]
Fridlund, M. [> > > >]
Absil, Olivier mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Scientific Frontiers in Research on Extrasolar Planets
Deming, Drake
Seager, Sara
Astronomical Society of the Pacific
ASP Conference Series, volume 294
San Fransisco
Scientific Frontiers in Research on Extrasolar Planets
du 18 au 21 juin 2002
Carnegie Institution
[en] The direct detection of an earth-like planet close to its parent star is challenging because the signal detected from the parent star is between 10[SUB]9[/SUB] and 10[SUB]6[/SUB] times brighter than the signal of a planet in the visual and infrared (IR), respectively. Future space based missions like DARWIN and TPF concentrate on the region between 6 and 18 microns, a region that contains the carbon dioxide, water, and ozone spectral features of the atmosphere. Using several small collecting telescopes and a beam combiner allows us to build an instrument with an angular resolution normally associated with monolithic telescopes of much larger diameters. The relative positions of the telescopes, forming the interferometer, are selected such that when the optical signals, collected by the individual telescopes, are coherently combined, the small angular distance between the planet and the star can be resolved. Different configurations of the free flying interferometer array influence the performance of the nulling array. The concepts for space nulling interferometers and the influence of different schemes of beam combination on the detected signal are investigated. The contribution of background noise to the detected signal is examined.
Copyright ASP 2003

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