Reference : Instrumental stability requirements for exoplanet detection with a nulling interferomete...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/19330
Instrumental stability requirements for exoplanet detection with a nulling interferometer: variability noise as a central issue
English
Chazelas, Bruno [> > > >]
Brachet, Frank [> > > >]
Bordé, Pascal [> > > >]
Mennesson, Bertrand [> > > >]
Ollivier, Marc [> > > >]
Absil, Olivier mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Labèque, Alain [> > > >]
Valette, Claude [> > > >]
Léger, Alain [> > > >]
10-Feb-2006
Applied Optics
Optical Society of America
45
984-992
Yes (verified by ORBi)
International
0003-6935
1539-4522
Washington
DC
[en] Phased-array imaging systems ; Interferometry ; Astronomical optics
[en] We revisit the nulling interferometer performances that are needed for direct detection and the spectroscopic analysis of exoplanets, e.g., with the DARWIN [European Space Agency-SCI 12 (2000)] or TPF-I [JPL Publ. 05-5, (2005)] missions. Two types of requirement are found, one concerning the mean value of the instrumental nulling function <nl(lambda)> and another regarding its stability. The stress is usually put on the former. It is stringent at short wavelengths but somewhat relaxed at longer wavelengths. The latter, which we call the variability noise condition, does not usually receive enough attention. It is required regardless of telescope size and stellar distance. The results from three nulling experiments performed in laboratories around the world are reported and compared with the requirements. All three exhibit 1/f noise that is incompatible with the performances required by the mission. As pointed out by Lay [Appl. Opt. 43, 6100-6123 (2004)], this stability problem is not fully solved by modulation techniques. Adequate solutions must be found that are likely to include servo systems using the stellar signal itself as a reference and internal metrology with high stability.
Researchers
http://hdl.handle.net/2268/19330
10.1364/AO.45.000984
http://adsabs.harvard.edu/abs/2006ApOpt..45..984C
http://www.opticsinfobase.org/abstract.cfm?URI=ao-45-5-984 - Copyright 2009 Optical Society of America (OSA)

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