Search for Hα from accreting protoplanets with SCExAO/VMAPIRES

The Visible Aperture Masking Polarimetric Interferometer for Resolving Exoplanetary Signatures (VAMPIRES) has newly started operation with Subaru/SCExAO. This instrument enables variety of imaging modes of polarization differential imaging (PDI), aperture masking, and spectral differential imaging with a Hα filter (SDI). The main purpose of the instrument is high-resolution imaging of circumstellar disks but the Hα SDI mode can provide another aspect of high-contrast imaging; accretion signatures. As reported accreting protoplanet candidates around LkCa 15 hydrogen emissions from protoplanets will directly benefit discussion of planet formation mechanisms. We introduce SDI observation and reduction schematics in the presentation.

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