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Exoplanetary searches with gravitational microlensing: Polarization issues |
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| Authors: | Alexander F Zakharov Gabriele Ingrosso Francesco De Paolis Achille A Nucita Francesco Strafella Sebastiano Calchi Novati Philippe Jetzer |
| Institution: | 1. Institute of Theoretical and Experimental Physics, Moscow 117218, Russia;2. Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980, Russia;3. North Carolina Central University, Durham, NC 27707, USA;4. Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, CP 193, I-73100 Lecce, Italy;5. INFN Sezione di Lecce, CP 193, I-73100 Lecce, Italy;6. Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, I-84081 Baronissi (SA), Italy;g Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Vietri Sul Mare (SA), Italy;h Institute for Theoretical Physics, University of Zürich, Winterthurerstrasse 190, CH-8057, Zürich, Switzerland |
| Abstract: | There are different methods for finding exoplanets such as radial spectral shifts, astrometrical measurements, transits, timing etc. Gravitational microlensing (including pixel-lensing) is among the most promising techniques with the potentiality of detecting Earth-like planets at distances about a few astronomical units from their host star or near the so-called snow line with a temperature in the range 0–100 °C on a solid surface of an exoplanet. We emphasize the importance of polarization measurements which can help to resolve degeneracies in theoretical models. In particular, the polarization angle could give additional information about the relative position of the lens with respect to the source. |
| Keywords: | Polarimetry Polarization Extra solar planets Microlensing Stellar atmospheres |
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