Point source polarimetry with the Gemini Planet Imager: Sensitivity characterization with T5.5 dwarf companion HD 19467 B
- Department of Astrophysics, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91101 (United States)
- Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON (Canada)
- Department of Astronomy, UC Berkeley, Berkeley, CA 94720 (United States)
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)
- Department of Physics and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Palo Alto, CA (United States)
- University of Exeter, Physics Department, Stocker Road, Exeter, EX4 4QL (United Kingdom)
- Department of Astronomy, UC Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 (United States)
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
- NASA Ames Research Center, MS-245-3, Moffett Field, CA 94035 (United States)
- Department of Physics and Astronomy, UCLA, Los Angeles, CA 90095 (United States)
- American Museum of Natural History, New York, NY 10024 (United States)
- Lawrence Livermore National Laboratory, Livermore, CA 94551 (United States)
- Gemini Observatory, Casilla 603, La Serena (Chile)
- SETI Institute, Carl Sagan Center, 189 Bernardo Avenue, Mountain View, CA 94043 (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{sub CL99.73%}⩽2.4%. We discuss our results in the context of T dwarf cloud models and photometric variability.
- OSTI ID:
- 22890101
- Journal Information:
- Astrophysical Journal, Vol. 820, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Since 2009, the country of publication for this journal is the UK.; ISSN 0004-637X
- Country of Publication:
- United Kingdom
- Language:
- English
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