The polarization of HD 189733
Article
Article Title | The polarization of HD 189733 |
---|---|
ERA Journal ID | 41989 |
Article Category | Article |
Authors | Bott, Kimberly, Bailey, Jeremy, Kedziora-Chudczer, Lucyna, Cotton, Daniel V., Lucas, P. W., Marshall, Jonathan P. and Hough, J. H. |
Journal Title | Monthly Notices of the Royal Astronomical Society: Letters |
Journal Citation | 459 (1), pp. L109-L113 |
Number of Pages | 5 |
Year | 2016 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 1745-3925 |
1745-3933 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnrasl/slw046 |
Web Address (URL) | https://academic.oup.com/mnrasl/article/459/1/L109/2589655 |
Abstract | We present linear polarization observations of the exoplanet system HD 189733 made with the HIgh Precision Polarimetric Instrument (HIPPI) on the Anglo-Australian Telescope (AAT). The observations have higher precision than any previously reported for this object. They do not show the large amplitude polarization variations reported by Berdyugina et al. Our results are consistent with polarization data presented by Wiktorowicz et al. A formal least squares fit of a Rayleigh-Lambert model yields a polarization amplitude of 29.4 ± 15.6 parts per million. We observe a background constant level of polarization of ~55-70 ppm, which is a little higher than expected for interstellar polarization at the distance of HD 189733. |
Keywords | Planets and satellites: Atmospheres; Planets and satellites: Individual: HD 189733b; Polarization; Techniques: Polarimetric |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | University of New South Wales |
University of Hertfordshire, United Kingdom |
https://research.usq.edu.au/item/wz8x6/the-polarization-of-hd-189733
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