TY - JOUR
T1 - OPTICAL IMAGING POLARIMETRY of the LkCa 15 PROTOPLANETARY DISK with SPHERE ZIMPOL
AU - Thalmann, C.
AU - Mulders, G. D.
AU - Janson, M.
AU - Olofsson, J.
AU - Benisty, M.
AU - Avenhaus, H.
AU - Quanz, S. P.
AU - Schmid, H. M.
AU - Henning, T.
AU - Buenzli, E.
AU - Ménard, F.
AU - Carson, J. C.
AU - Garufi, A.
AU - Messina, S.
AU - Dominik, C.
AU - Leisenring, J.
AU - Chauvin, G.
AU - Meyer, M. R.
N1 - Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - We present the first optical (590-890 nm) imaging polarimetry observations of the pre-transitional protoplanetary disk around the young solar analog LkCa 15, addressing a number of open questions raised by previous studies. We detect the previously unseen far side of the disk gap, confirming the highly off-centered scattered-light gap shape that was postulated from near-infrared imaging, at odds with the symmetric gap inferred from millimeter interferometry. Furthermore, we resolve the inner disk for the first time and trace it out to 30 AU. This new source of scattered light may contribute to the near-infrared interferometric signal attributed to the protoplanet candidate LkCa 15 b, which lies embedded in the outer regions of the inner disk. Finally, we present a new model for the system architecture of LkCa 15 that ties these new findings together. These observations were taken during science verification of SPHERE ZIMPOL and demonstrate this facility's performance for faint guide stars under adverse observing conditions.
AB - We present the first optical (590-890 nm) imaging polarimetry observations of the pre-transitional protoplanetary disk around the young solar analog LkCa 15, addressing a number of open questions raised by previous studies. We detect the previously unseen far side of the disk gap, confirming the highly off-centered scattered-light gap shape that was postulated from near-infrared imaging, at odds with the symmetric gap inferred from millimeter interferometry. Furthermore, we resolve the inner disk for the first time and trace it out to 30 AU. This new source of scattered light may contribute to the near-infrared interferometric signal attributed to the protoplanet candidate LkCa 15 b, which lies embedded in the outer regions of the inner disk. Finally, we present a new model for the system architecture of LkCa 15 that ties these new findings together. These observations were taken during science verification of SPHERE ZIMPOL and demonstrate this facility's performance for faint guide stars under adverse observing conditions.
KW - circumstellar matter
KW - planets and satellites: formation
KW - protoplanetary disks
KW - stars: individual(LkCa 15)
KW - stars: pre-main sequence
KW - techniques: high angular resolution
UR - http://www.scopus.com/inward/record.url?scp=84938684470&partnerID=8YFLogxK
U2 - 10.1088/2041-8205/808/2/L41
DO - 10.1088/2041-8205/808/2/L41
M3 - Article
AN - SCOPUS:84938684470
VL - 808
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 2
M1 - L41
ER -