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Extreme Asymmetry in the Polarized Disk of V1247 OrionisWe present the first near-infrared scattered-light detection of the transitional disk around V1247 Ori, which was obtained using high-resolution polarimetric differential imaging observations with Subaru/HiCIAO. Our imaging in the H band reveals the disk morphology at separations of approx.0.14-0.86 (54-330 au) from the central star. The polarized intensity image shows a remarkable arc-like structure toward the southeast of the star, whereas the fainter northwest region does not exhibit any notable features. The shape of the arm is consistent with an arc of 0.28 +/- 0.09 in radius (108 au from the star), although the possibility of a spiral arm with a small pitch angle cannot be excluded. V1247 Ori features an exceptionally large azimuthal contrast in scattered, polarized light; the radial peak of the southeastern arc is about three times brighter than the northwestern disk measured at the same distance from the star. Combined with the previous indication of an inhomogeneous density distribution in the gap at 46 au, the notable asymmetry in the outer disk suggests the presence of unseen companions and/or planet-forming processes ongoing in the arc.
Document ID
20160008411
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ohta, Yurina (Osaka Univ. Japan)
Fukagawa, Misato (Nagoya Univ. Nagoya, Japan)
Sitko, Michael (Space Science Inst. Boulder, CO, United States)
Muto, Takayuki (Kogakuin Univ. Tokyo, Japan)
Kraus, Stefan (Exeter Univ. United Kingdom)
Grady, Carol A. (Eureka Scientific, Inc. Oakland, CA, United States)
Wisniewski, John A. (Oklahoma Univ. Norman, OK, United States)
Swearingen, Jeremy R. (Cincinnati Univ. OH, United States)
Shibai, Hiroshi (Osaka Univ. Japan)
McElwain, Michael W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
July 1, 2016
Publication Date
May 13, 2016
Publication Information
Publication: Publications of the Astronomical Society of Japan
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN33579
Funding Number(s)
CONTRACT_GRANT: NNG16PX39P
Distribution Limits
Public
Copyright
Other
Keywords
azimuthal contrast
polarimetric differential imaging observations
disk morphology