Extreme asymmetry in the polarized disk of V1247 Orionis

Yurina Ohta, Misato Fukagawa, Michael L. Sitko, Takayuki Muto, Stefan Kraus, Carol A. Grady, John P. Wisniewski, Jeremy R. Swearingen, Hiroshi Shibai, Takahiro Sumi, Jun Hashimoto, Tomoyuki Kudo, Nobuhiko Kusakabe, Munetake Momose, Yoshiko Okamoto, Takayuki Kotani, Michihiro Takami, Thayne Currie, Christian Thalmann, Markus JansonEiji Akiyama, Katherine B. Follette, Satoshi Mayama, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Joseph C. Carson, Sebastian E. Egner, Markus Feldt, Miwa Goto, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Ryo Kandori, Gillian R. Knapp, Masayuki Kuzuhara, Jungmi Kwon, Taro Matsuo, Michael W. Mcelwain, Shoken Miyama, Jun Ichi Morino, Amaya Moro-Martín, Tetsuo Nishimura, Tae Soo Pyo, Eugene Serabyn, Takuya Suenaga, Hiroshi Suto, Ryuji Suzuki, Yasuhiro H. Takahashi, Hideki Takami, Naruhisa Takato, Hiroshi Terada, Daigo Tomono, Edwin L. Turner, Tomonori Usuda, Makoto Watanabe, Toru Yamada, Motohide Tamura

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

We 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 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.

Original languageEnglish (US)
Article number53
JournalPublications of the Astronomical Society of Japan
Volume68
Issue number4
DOIs
StatePublished - 2016

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • High angular resolution
  • Individual (V1247 Orionis)-techniques
  • Planetary systems-protoplatenary disks-stars
  • Polarimetric-techniques

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    Ohta, Y., Fukagawa, M., Sitko, M. L., Muto, T., Kraus, S., Grady, C. A., Wisniewski, J. P., Swearingen, J. R., Shibai, H., Sumi, T., Hashimoto, J., Kudo, T., Kusakabe, N., Momose, M., Okamoto, Y., Kotani, T., Takami, M., Currie, T., Thalmann, C., ... Tamura, M. (2016). Extreme asymmetry in the polarized disk of V1247 Orionis. Publications of the Astronomical Society of Japan, 68(4), [53]. https://doi.org/10.1093/pasj/psw051