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We present the first optical (590--890 nm) imaging polarimetry observationsof the pre-transitional protoplanetary disk around the young solar analog LkCa15, addressing a number of open questions raised by previous studies. We detectthe previously unseen far side of the disk gap, confirm the highly eccentricscattered-light gap shape that was postulated from near-infrared imaging, atodds with the symmetric gap inferred from millimeter interferometry.Furthermore, we resolve the inner disk for the first time and trace it out to30 AU. This new source of scattered light may contribute to the near-infraredinterferometric signal attributed to the protoplanet candidate LkCa 15 b, whichlies embedded in the outer regions of the inner disk. Finally, we present a newmodel for the system architecture of LkCa 15 that ties these new findingstogether. These observations were taken during science verification of SPHEREZIMPOL and demonstrate this facility's performance for faint guide stars underadverse observing conditions.

Optical imaging polarimetry of the LkCa 15 protoplanetary disk with SPHERE ZIMPOL