Polarimetric Measurements of Protoplanetary Disks with ExPo

Details Polarimetric Measurements of Protoplanetary Disks with ExPo Polarimetric Measurements of Protoplanetary Disks with ExPo

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158..381c&link_type=abstract

EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V

Computer Science

Space-Based Ultraviolet, Optical, And Infrared Telescopes, Accretion And Accretion Disks, Substellar Companions, Planets, Polarimetry

Scientific paper

Polarimetry is a powerful tool for detecting and characterizing exoplanets and protoplanetary disks as light scattered from circumstellar material is linearly polarized. We present the first light results of ExPo (Extreme Polarimeter) [1], a sensitive imaging polarimeter developed at Utrecht University that works in the visible part of the spectrum. Our first light observations at the 4.2-meter William Herschel Telescope (WHT) show that ExPo can reach the high-contrast ratios that are necessary to observe protoplanetary disks. We present images of the protoplanetary disks around the Herbig Ae star AB Aurigae and the T Tauri star SU Aurigae. Our results show the power of polarimetry for future projects e.g. the ZIMPOL arm of SPHERE, and the EPOL part of EPICS.

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