TY - JOUR
T1 - POINT SOURCE POLARIMETRY with the GEMINI PLANET IMAGER
T2 - SENSITIVITY CHARACTERIZATION with T5.5 DWARF COMPANION HD 19467 B
AU - Jensen-Clem, Rebecca
AU - Millar-Blanchaer, Max
AU - Mawet, Dimitri
AU - Graham, James R.
AU - Wallace, J. Kent
AU - Macintosh, Bruce
AU - Hinkley, Sasha
AU - Wiktorowicz, Sloane J.
AU - Perrin, Marshall D.
AU - Marley, Mark S.
AU - Fitzgerald, Michael P.
AU - Oppenheimer, Rebecca
AU - Ammons, S. Mark
AU - Rantakyrö, Fredrik T.
AU - Marchis, Franck
N1 - Funding Information:
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.
Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - 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 pCL99.73% ≤ 2.4%. We discuss our results in the context of T dwarf cloud models and photometric variability.
AB - 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 pCL99.73% ≤ 2.4%. We discuss our results in the context of T dwarf cloud models and photometric variability.
KW - brown dwarfs
KW - stars: individual (HD 19467)
KW - techniques: high angular resolution
KW - techniques: polarimetric
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U2 - 10.3847/0004-637X/820/2/111
DO - 10.3847/0004-637X/820/2/111
M3 - Article
AN - SCOPUS:84962892917
VL - 820
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 111
ER -