The polarisation of HD 189733

Kimberly Bott; Jeremy Bailey; Lucyna Kedziora-Chudczer; Daniel V. Cotton; P. W. Lucas; Jonathan P. Marshall; J. H. Hough

doi:10.1093/mnrasl/slw046

The polarisation of HD 189733

Kimberly Bott, Jeremy Bailey, Lucyna Kedziora-Chudczer, Daniel V. Cotton, P. W. Lucas, Jonathan P. Marshall, J. H. Hough

Centre for Astrophysics Research (CAR)

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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. 2008 and Berdyugina et al. 2011. Our results are consistent with polarization data presented by Wiktorowicz et al. 2015. 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.

Original language	English
Pages (from-to)	109-113
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	459
Issue number	1
Early online date	20 Mar 2016
DOIs	https://doi.org/10.1093/mnrasl/slw046
Publication status	Published - 11 Jun 2016

Keywords

polarization
techniques: polarimetric
planets and satellites: atmospheres
planets and satellites: individual: HD 189733b

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10.1093/mnrasl/slw046

L109.full2Final published version, 330 KBLicence: Unspecified

Cite this

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title = "The polarisation of HD 189733",

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. 2008 and Berdyugina et al. 2011. Our results are consistent with polarization data presented by Wiktorowicz et al. 2015. 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.",

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AU - Marshall, Jonathan P.

AU - Hough, J. H.

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AB - 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. 2008 and Berdyugina et al. 2011. Our results are consistent with polarization data presented by Wiktorowicz et al. 2015. 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.

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KW - planets and satellites: individual: HD 189733b

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JF - Monthly Notices of the Royal Astronomical Society: Letters

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ER -

The polarisation of HD 189733

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