25 July 2008 SPHERE ZIMPOL: overview and performance simulation
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Abstract
The ESO planet finder instrument SPHERE will search for the polarimetric signature of the reflected light from extrasolar planets, using a VLT telescope, an extreme AO system (SAXO), a stellar coronagraph, and an imaging polarimeter (ZIMPOL). We present the design concept of the ZIMPOL instrument, a single-beam polarimeter that achieves very high polarimetric accuracy using fast polarization modulation and demodulating CCD detectors. Furthermore, we describe comprehensive performance simulations made with the CAOS problem-solving environment. We conclude that direct detection of Jupiter-sized planets in close orbit around the brightest nearby stars is achievable with imaging polarimetry, signal-switching calibration, and angular differential imaging.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christian Thalmann, Hans M. Schmid, Anthony Boccaletti, David Mouillet, Kjetil Dohlen, Ronald Roelfsema, Marcel Carbillet, Daniel Gisler, Jean-Luc Beuzit, Markus Feldt, Raffaele Gratton, Franco Joos, Christoph U. Keller, Jan Kragt, Johan H. Pragt, Pascal Puget, Florence Rigal, Frans Snik, Rens Waters, François Wildi, "SPHERE ZIMPOL: overview and performance simulation", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70143F (25 July 2008); doi: 10.1117/12.789158; https://doi.org/10.1117/12.789158
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