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Integral Field Polarimetry and Scattered-Light Imaging of AB Aurigae with SCExAO/CHARIS

Presentation #222.05 in the session Exoplanets Formation & Evolution (Poster)

Published onOct 23, 2023
Integral Field Polarimetry and Scattered-Light Imaging of AB Aurigae with SCExAO/CHARIS

Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), when combined with Subaru Coronagraphic Extreme Adaptive Optics (SCExAO), is the first extreme adaptive optics system capable of obtaining high contrast spectropolarimetric images in the Near Infrared. This is particularly advantageous for studying protoplanetary disks as it allows us to probe the wavelength dependence of the scattering properties of small particles above the midplane of these disks. We used SCExAO/CHARIS to obtain integral field polarimetry of the protoplanetary disk surrounding AB Aurigae across 22 wavelength channels encompassing the J, H, and K passbands (1.1 – 2.4 μm). From these observations, we derived surface brightness and color profiles across the major and minor axes as well as the polarization spectrum across the disk. Combined with previous total intensity observations, we were also able to determine the polarization fraction for the disk.

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