Point source polarimetry with the Gemini planet imager: Sensitivity characterization with T5.5 dwarf companion HD 19467 B

Jensen-Clem, Rebecca; Millar-Blanchaer, Max; Mawet, Dimitri; Graham, James R.; Wallace, J. Kent; Macintosh, Bruce; Hinkley, Sasha; Wiktorowicz, Sloane J.; Perrin, Marshall D.; Marley, Mark S.; Fitzgerald, Michael P.; Oppenheimer, Rebecca; Ammons, S. Mark; Rantakyrö, Fredrik T.; Marchis, Franck

doi:10.3847/0004-637X/820/2/111

Title: Point source polarimetry with the Gemini planet imager: Sensitivity characterization with T5.5 dwarf companion HD 19467 B

Journal Article · Tue Mar 29 00:00:00 EDT 2016 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/0004-637X/820/2/111· OSTI ID:1324522

Jensen-Clem, Rebecca ^[1];

^[2];

^[1]; Graham, James R. ^[3]; Wallace, J. Kent ^[1];

^[4]; Hinkley, Sasha ^[5];

^[6];

^[7]; Marley, Mark S. ^[8];

^[9];

^[10];

^[11];

^[12];

^[13]

California Inst. of Technology (CalTech), Pasadena, CA (United States)
Univ. of Toronto, Toronto, ON (Canada)
Univ. of California, Berkeley, CA (United States)
Stanford Univ., Palo Alto, CA (United States)
Univ. of Exeter, Exeter (United Kingdom)
Univ. of California, Santa Cruz, CA (United States)
Space Telescope Science Institute, Baltimore, MD (United States)
NASA Ames Research Center, Moffett Field, CA (United States)
Univ. of California, Los Angeles, CA (United States)
American Museum of Natural History, New York, NY (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Gemini Observatory, La Serena (Chile)
SETI Institute, Mountain View, CA (United States)

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 $${p}_{\mathrm{CL}99.73\%}\leqslant 2.4\%$$. In conclusion, we discuss our results in the context of T dwarf cloud models and photometric variability.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1324522

Report Number(s):: LLNL-JRNL-678637

Journal Information:: The Astrophysical Journal (Online), Vol. 820, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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GPI Spectroscopy of the Mass, Age, and Metallicity Benchmark Brown Dwarf HD 4747 B Crepp, Justin R.; Principe, David A.; Wolff, Schuyler arXiv https://doi.org/10.48550/arxiv.1801.06192	text	January 2018
WIRC+Pol: a low-resolution near-infrared spectropolarimeter Tinyanont, Samaporn; Millar-Blanchaer, Maxwell A.; Nilsson, Ricky arXiv https://doi.org/10.48550/arxiv.1811.03138	text	January 2018
The polarimetric imaging mode of VLT/SPHERE/IRDIS I: Description, data reduction and observing strategy de Boer, J.; Langlois, M.; van Holstein, R. G. arXiv https://doi.org/10.48550/arxiv.1909.13107	text	January 2019
The polarimetric imaging mode of VLT/SPHERE/IRDIS II: Characterization and correction of instrumental polarization effects van Holstein, R. G.; Girard, J. H.; de Boer, J. arXiv https://doi.org/10.48550/arxiv.1909.13108	text	January 2019

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