The Elusive SR-21 Inner Cavity: Polarized Images Reveal that Submillimeter-Resolved Cavity is Not Present in the NIR

Details The Elusive SR-21 Inner Cavity: Polarized Images Reveal that Submillimeter-Resolved Cavity is Not Present in the NIR The Elusive SR-21 Inner Cavity: Polarized Images Reveal that Submillimeter-Resolved Cavity is Not Present in the NIR

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934404f&link_type=abstract

American Astronomical Society, AAS Meeting #219, #344.04

Mathematics

Metric Geometry

Scientific paper

We present Subaru HiCIAO Polarized Differential Imaging (PDI) data of the SR-21 transitional disk at H band. Computed polarization vectors show centrosymmetric geometry in the region surrounding the star and are consistent with an extended scattered light disk . Although previous studies have revealed a cleared inner cavity inside of 18AU, our results show no evidence of a cavity at shorter wavelengths. This has interesting theoretical implications, as it would appear that the cavity resolved at submillimeter wavelengths contains enough small grains to scatter strongly at H-band.

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