Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 1, 2016 | Published + Submitted
Journal Article Open

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

Abstract

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.

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.

Attached Files

Published - Jensen-Clem_2016_ApJ_820_111.pdf

Submitted - 1601.01353v1.pdf

Files

1601.01353v1.pdf
Files (1.5 MB)
Name Size Download all
md5:9949d9bae9686077d1f1bc5e00809e2d
679.5 kB Preview Download
md5:fbfa077b1814ac317fdfd0bc9606192f
828.1 kB Preview Download

Additional details

Created:
August 20, 2023
Modified:
October 18, 2023