論文

査読有り
2016年11月

SUBMILLIMETER POLARIZATION OBSERVATION OF THE PROTOPLANETARY DISK AROUND HD 142527

ASTROPHYSICAL JOURNAL LETTERS
  • Akimasa Kataoka
  • ,
  • Takashi Tsukagoshi
  • ,
  • Munetake Momose
  • ,
  • Hiroshi Nagai
  • ,
  • Takayuki Muto
  • ,
  • Cornelis P. Dullemond
  • ,
  • Adriana Pohl
  • ,
  • Misato Fukagawa
  • ,
  • Hiroshi Shibai
  • ,
  • Tomoyuki Hanawa
  • ,
  • Koji Murakawa

831
2
開始ページ
12
終了ページ
17
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3847/2041-8205/831/2/L12
出版者・発行元
IOP PUBLISHING LTD

We present the polarization observations toward the circumstellar disk around HD 142527 by using Atacama Large Millimeter/submillimeter Array at the frequency of 343 GHz. The beam size is 0.'' 51 x 0.'' 44, which corresponds to the spatial resolution of similar to 71 x 62 au. The polarized intensity displays a ring-like structure with a peak located on the east side with a polarization fraction of P = 3.26 +/- 0.02%, which is different from the peak of the continuum emission from the northeast region. The polarized intensity is significantly weaker at the peak of the continuum where P = 0.220 +/- 0.010%. The polarization vectors are in the radial direction in the main ring of the polarized intensity, while there are two regions outside at the northwest and northeast areas where the vectors are in the azimuthal direction. If the polarization vectors represent the magnetic field morphology, the polarization vectors indicate the toroidal magnetic field configuration on the main ring and the poloidal fields outside. On the other hand, the flip of the polarization vectors is predicted by the self-scattering of thermal dust emission due to the change of the direction of thermal radiation flux. Therefore, we conclude that self-scattering of thermal dust emission plays a major role in producing polarization at millimeter wavelengths in this protoplanetary disk. Also, this puts a constraint on the maximum grain size to be approximately 150 mu m if we assume compact spherical dust grains.

Web of Science ® 被引用回数 : 41

リンク情報
DOI
https://doi.org/10.3847/2041-8205/831/2/L12
arXiv
http://arxiv.org/abs/arXiv:1610.06318
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000387569500003&DestApp=WOS_CPL
URL
http://arxiv.org/abs/1610.06318v2