Subaru imaging of asymmetric features in a transitional disk in upper Scorpius

S. Mayama, J. Hashimoto, T. Muto, T. Tsukagoshi, N. Kusakabe, M. Kuzuhara, Y. Takahashi, T. Kudo, R. Dong, M. Fukagawa, M. Takami, M. Momose, J. P. Wisniewski, K. Follette, L. Abe, E. Akiyama, W. Brandner, T. Brandt, J. Carson, S. EgnerM. Feldt, M. Goto, C. A. Grady, O. Guyon, Y. Hayano, M. Hayashi, S. Hayashi, T. Henning, K. W. Hodapp, M. Ishii, M. Iye, M. Janson, R. Kandori, J. Kwon, G. R. Knapp, T. Matsuo, M. W. McElwain, S. Miyama, J. I. Morino, A. Moro-Martin, T. Nishimura, T. S. Pyo, E. Serabyn, H. Suto, R. Suzuki, N. Takato, H. Terada, C. Thalmann, D. Tomono, E. L. Turner, M. Watanabe, T. Yamada, H. Takami, T. Usuda, M. Tamura

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

We report high-resolution (0.07 arcsec) near-infrared polarized intensity images of the circumstellar disk around the star 2MASS J16042165-2130284 obtained with HiCIAO mounted on the Subaru 8.2m telescope. We present our H-band data, which clearly exhibit a resolved, face-on disk with a large inner hole for the first time at infrared wavelengths. We detect the centrosymmetric polarization pattern in the circumstellar material as has been observed in other disks. Elliptical fitting gives the semimajor axis, semiminor axis, and position angle (P.A.) of the disk as 63AU, 62AU, and -14°, respectively. The disk is asymmetric, with one dip located at P.A.s of ∼85°. Our observed disk size agrees well with a previous study of dust and CO emission at submillimeter wavelength with Submillimeter Array. Hence, the near-infrared light is interpreted as scattered light reflected from the inner edge of the disk. Our observations also detect an elongated arc (50AU) extending over the disk inner hole. It emanates at the inner edge of the western side of the disk, extending inward first, then curving to the northeast. We discuss the possibility that the inner hole, the dip, and the arc that we have observed may be related to the existence of unseen bodies within the disk.

Original languageEnglish (US)
Article numberL26
JournalAstrophysical Journal Letters
Volume760
Issue number2
DOIs
StatePublished - Dec 1 2012

Keywords

  • planetary systems
  • protoplanetary disks
  • stars: pre-main sequence
  • techniques: polarimetric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Mayama, S., Hashimoto, J., Muto, T., Tsukagoshi, T., Kusakabe, N., Kuzuhara, M., Takahashi, Y., Kudo, T., Dong, R., Fukagawa, M., Takami, M., Momose, M., Wisniewski, J. P., Follette, K., Abe, L., Akiyama, E., Brandner, W., Brandt, T., Carson, J., ... Tamura, M. (2012). Subaru imaging of asymmetric features in a transitional disk in upper Scorpius. Astrophysical Journal Letters, 760(2), [L26]. https://doi.org/10.1088/2041-8205/760/2/L26