|Reference : Configurations and modulation schemes trade-off (invited)|
|Scientific conferences in universities or research centers : Scientific conference in universities or research centers|
|Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics|
|Configurations and modulation schemes trade-off (invited)|
|Absil, Olivier [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]|
|GENIE - DARWIN Workshop - Hunting for Planets|
|3/06/2002 - 6/06/2002|
|[en] During the preliminary phase A of GENIE, a number of interferometric configurations have been studied, in the cases of exo-zodiacal cloud and hot Jupiter detection. Their expected performances
have been computed in light of the measured or expected performances of the VLTI sub-systems. A simple Bracewell nulling interferometer, formed of two Unit Telescopes and working in the L' or N bands, has been identified as a good candidate configuration for exo-zodiacal cloud detection.
External or internal chopping, fringe tracking and amplitude matching will be critical issues for this configuration. In the case of hot Jupiter detection, a double Bracewell with internal modulation in the L' band seem well appropriate, and should allow to carry out low resolution spectroscopy on a few bright exoplanets. The basic assumptions and computations which have lead to these candidate configurations will be described in this talk.
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