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Closure phase studies toward direct detection of light from hotJupiters

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 baselineoptical interferometers is a promising way to directly detect light from nearbyhot Jupiters. Here we present our closure phase simulations for the CHARA arrayfor several bright hot Jupiters, υ And b, 51 Peg b, and τBoo b. The maximum possible closure phase signals from these hot Jupiters arevery small, for example, only ∼0.17 degrees for υ And b,requiring very high precision and stable closure phase measurements. We presentpreliminary results of a closure phase study on test object β Tau andhot Jupiter system υ And, both obtained with the MIRC instrument atthe CHARA array. We demonstrate that directly detecting the light from hotJupiters is feasible using high precision closure phase measurements obtained byCHARA-MIRC along with its sub-milli-arcsecond resolution, although challengesremain.

Keywords

techniques: interferometrytechniques: high angular resolutionexoplanets: hot Jupiters: υ And b51 Peg bτ Boo b

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