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Point Source Polarimetry with the Gemini Planet Imager: Sensitivity Characterization with T5.5 Dwarf Companion HD 19467 B

Jensen-Clem, Rebecca and Millar-Blanchaer, Max and Mawet, Dimitri and Graham, James R. and Wallace, J. Kent and Macintosh, Bruce and Hinkley, Sasha and Wiktorowicz, Sloane J. and Perrin, Marshall D. and Marley, Mark S. and Fitzgerald, Michael P. and Oppenheimer, Rebecca and Ammons, S. Mark and Rantakyro, Fredrik T. and Marchis, Franck (2016) Point Source Polarimetry with the Gemini Planet Imager: Sensitivity Characterization with T5.5 Dwarf Companion HD 19467 B. Astrophysical Journal, 820 (2). Art. No. 111. ISSN 1538-4357. doi:10.3847/0004-637X/820/2/111.

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Detecting polarized light from self-luminous exoplanets has the potential to provide key information about rotation, surface gravity, cloud grain size, and cloud coverage. While field brown dwarfs with detected polarized emission are common, no exoplanet or substellar companion has yet been detected in polarized light. With the advent of high contrast imaging spectro-polarimeters such as GPI and SPHERE, such a detection may now be possible with careful treatment of instrumental polarization. In this paper, we present 28 minutes of H-band GPI polarimetric observations of the benchmark T5.5 companion HD 19467 B. We detect no polarization signal from the target, and place an upper limit on the degree of linear polarization of p_(CL99.73%) ⩽ 2.4%. We discuss our results in the context of T dwarf cloud models and photometric variability.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Jensen-Clem, Rebecca0000-0003-0054-2953
Millar-Blanchaer, Max0000-0001-6205-9233
Mawet, Dimitri0000-0002-8895-4735
Macintosh, Bruce0000-0003-1212-7538
Hinkley, Sasha0000-0001-8074-2562
Wiktorowicz, Sloane J.0000-0003-4483-5037
Perrin, Marshall D.0000-0002-3191-8151
Marley, Mark S.0000-0002-5251-2943
Fitzgerald, Michael P.0000-0002-0176-8973
Oppenheimer, Rebecca0000-0001-7130-7681
Ammons, S. Mark0000-0001-5172-7902
Marchis, Franck0000-0001-7016-7277
Additional Information:© 2016 The American Astronomical Society. Received 2015 October 7; accepted 2016 January 6; published 2016 March 29. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1144469. This work was performed in part under contract with the California Institute of Technology (Caltech) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute, and under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-1144469
Department of Energy (DOE)DE-AC52-07NA27344
Subject Keywords:brown dwarfs – stars: individual (HD 19467) – techniques: high angular resolution – techniques: polarimetric
Issue or Number:2
Record Number:CaltechAUTHORS:20160405-121401791
Persistent URL:
Official Citation:Rebecca Jensen-Clem et al 2016 ApJ 820 111
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65933
Deposited By: Joy Painter
Deposited On:06 Apr 2016 05:13
Last Modified:10 Nov 2021 23:51

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