Near-IR Polarized Scattered Light Imagery of the DoAr 28 Transitional Disk
astro-ph.EP
/ Authors
Evan A. Rich, John P. Wisniewski, Satoshi Mayama, Timothy D. Brandt, Jun Hashimoto, Tomoyuki Kudo, Nobuhiko Kusakabe, Catherine Espaillat, Lyu Abe, Eiji Akiyama
and 45 more authors
Wolfgang Brandner, Joseph C. Carson, Thayne Currie, Sebastian Egner, Markus Feldt, Kate Follette, Miwa Goto, Carol A. Grady, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Markus Janson, Ryo Kandori, Gillian R. Knapp, Masayuki Kuzuhara, Jungmi Kwon, Taro Matsuo, Michael W. McElwain
/ Abstract
We present the first spatially resolved polarized scattered light H-band detection of the DoAr 28 transitional disk. Our two epochs of imagery detect the scattered light disk from our effective inner working angle of 0.10" (13 AU) out to 0.50" (65 AU). This inner working angle is interior to the location of the system's gap inferred by previous studies using SED modeling (15 AU). We detected a candidate point source companion 1.08" northwest of the system; however, our second epoch of imagery strongly suggests that this object is a background star. We constructed a grid of Monte Carlo Radiative Transfer models of the system, and our best fit models utilize a modestly inclined (50 deg), 0.01 Msun disk that has a partially depleted inner gap from the dust sublimation radius out to ~8 AU. Subtracting this best fit, axi-symmetric model from our polarized intensity data reveals evidence for two small asymmetries in the disk, which could be attributable to variety of mechanisms.