MIRC-X polarinterferometry at CHARA
| Autor: | Narsireddy Anugu, Benjamin R. Setterholm, Keith J. C. Johnson, T. ten Brummelaar, Jacob Ennis, Jean-Baptiste Le Bouquin, Aaron Labdon, John D. Monnier, Stefan Kraus |
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| Rok vydání: | 2020 |
| Předmět: |
Chara
Physics biology Be star Astrophysics::Instrumentation and Methods for Astrophysics Polarimetry Astronomy Astrophysics::Cosmology and Extragalactic Astrophysics biology.organism_classification Polarization (waves) law.invention Stars Interferometry Achromatic lens law Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics Beam splitter |
| Zdroj: | Optical and Infrared Interferometry and Imaging VII. |
| DOI: | 10.1117/12.2562407 |
| Popis: | We present a new polarimetric mode for the MIRC-X 6-telescope beam combiner at CHARA. Utilizing the extensive u − v coverage afforded by CHARA this mode will be able to resolve and constrain scattered light in environs at milliarcsecond separations of target stars, a largely unexplored parameter space to-date in astronomy. Notably, this upgrade will allow for the investigation of the scattering properties of the inner dust wall at the sublimation radius of Herbig Ae/Be star disks, dust shells surrounding evolved stars, and gas-rich disks around Be stars. Our design adds a series of rotating half-wave plates, achromatic across J- and H-bands, and a polarizing beamsplitter into the MIRC-X beam path. In this work, we also preview on-sky observations, discussing ongoing work calibrating instrumental polarization effects in the CHARA beam path as well as upgrades to the MIRC-X data reduction pipeline. |
| Databáze: | OpenAIRE |
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