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Closure phase studies toward direct detection of light from hot Jupiters

Published online by Cambridge University Press:  01 October 2007

Ming Zhao ,
John D. Monnier ,
Theo ten Brummelaar ,
Ettore Pedretti  and
Nathalie Thureau
Ming Zhao
Affiliation:
Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA email: mingzhao@umich.edu
John D. Monnier
Affiliation:
Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA email: mingzhao@umich.edu
Theo ten Brummelaar
Affiliation:
The CHARA Array, Georgia State University
Ettore Pedretti
Affiliation:
University of St. Andrews, Scotland, UK
Nathalie Thureau
Affiliation:
University of Cambridge, UK
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Abstract

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Precision closure phase measurements obtained with ground-based long baseline optical interferometers is a promising way to directly detect light from nearby hot Jupiters. Here we present our closure phase simulations for the CHARA array for several bright hot Jupiters, υ And b, 51 Peg b, and τ Boo b. The maximum possible closure phase signals from these hot Jupiters are very small, for example, only ∼0.17 degrees for υ And b, requiring very high precision and stable closure phase measurements. We present preliminary results of a closure phase study on test object β Tau and hot Jupiter system υ And, both obtained with the MIRC instrument at the CHARA array. We demonstrate that directly detecting the light from hot Jupiters is feasible using high precision closure phase measurements obtained by CHARA-MIRC along with its sub-milli-arcsecond resolution, although challenges remain.

Keywords

techniques: interferometrytechniques: high angular resolutionexoplanets: hot Jupiters: υ And b51 Peg bτ Boo b
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S249: Exoplanets: Detection, Formation and Dynamics , October 2007 , pp. 71 - 77
Copyright
Copyright © International Astronomical Union 2008

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