Near-infrared polarimetry of the GG Tauri A binary system

作     者：Yoichi Itoh Yumiko Oasa Tomoyuki Kudo Nobuhiko Kusakabe Jun Hashimoto Lyu Abe Wolfgang Brandner Timothy D.Brandt Joseph C.Carson Sebastian Egner Markus Feldt 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 Shoken Miyama Jun-Ichi Morino Amaya Moro-Martin Tetsuo Nishimura Tae-Soo Pyo Eugene Serabyn Takuya Suenaga Hiroshi Suto Ryuji Suzuki Yasuhiro H.Takahashi Naruhisa Takato Hiroshi Terada Christian Thalmann Daigo Tomono Edwin L.Turner Makoto Watanabe John Wisniewski Toru Yamada Satoshi Mayama Thayne Currie Hideki Takami Tomonori Usuda Motohide Tamura 

作者机构：Nishi-Harima Astronomical ObservatoryCenter for AstronomyUniversity of Hyogo407-2NishigaichiSayoHyogo 679-5313Japan Faculty of EducationSaitama University255 Shimo-OkuboSakuraSaitamaSaitama338-8570Japan Subaru TelescopeNational Astronomical Observatory of Japan650 North Ahoku PlaceHiloHI 96720USA National Astronomical Observatory of Japan2-21-1OsawaMitakaTokyo181-8588Japan H.L.Dodge Department of Physics & AstronomyUniversity of Oklahoma440 W Brooks St.NormanOK 73019USA Laboratoire Lagrange (UMR 7293)Universit de Nice-Sophia AntipolisCNRSObservatoire de la Cote d’Azur28 avenue Valrose06108 Nice Cedex 2France Max Planck Institute for AstronomyKnigstuhl 1769117 HeidelbergGermany Department of Astrophysical SciencePrinceton UniversityPeyton HallIvy LanePrincetonNJ 08544USA Department of Physics and AstronomyCollege of Charleston58 Coming St.CharlestonSC29424USA Subaru TelescopeNational Astronomical Observatory of Japan650 North A’ohoku PlaceHiloHI 96720USA Exoplanets and Stellar Astrophysics LaboratoryCode 667Goddard Space Flight CenterGreenbeltMD 20771USA Eureka Scientific2452 DelmerSuite 100Oakland CA 96002USA Goddard Center for AstrobiologyGreenbeltMD 20771USA Institute for AstronomyUniversity of Hawaii640 N.Aohoku PlaceHiloHI 96720USA Department of Earth and Planetary SciencesTokyo Institute of TechnologyOokayamaMeguro-kuTokyo 152-8551Japan Department of AstronomyKyoto UniversityKitashirakawa-Oiwake-choSakyo-kuKyotoKyoto 606-8502Japan Hiroshima University1-3-2KagamiyamaHigashihiroshimaHiroshima 739-8511Japan Department of AstrophysicsCAB-CSIC/INTA28850 Torrejón de ArdozMadridSpain Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCA91109USA Department of Astronomical ScienceThe Graduate University for Advanced Studies2-21-1OsawaMitakaTokyo181-8588Japan Department of AstronomyThe University of Tokyo7-3-1HongoBunkyo-kuTokyo113-0033Japan Astronomical Institute "Anton Pannekoek"University of AmsterdamPostbus 942491090 GEAmsterdamThe Netherlands Kavli Institute for Physics and Mathematics of the UniverseThe University of Tokyo5-1-5KashiwanohaKashiwaChiba 277-8568Japan Department of CosmosciencesHokkaido UniversityKita-kuSapporoHokkaido 060-0810Japan Astronomical InstituteTohoku UniversityAoba-kuSendaiMiyagi 980-8578Japan The Center for the Promotion of Integrated SciencesThe Graduate University for Advanced Studies (SOKENDAI)Shonan International VillageHayama-choMiura-gunKanagawa240-0193Japan Department of Astronomy & AstrophysicsUniversity of Toronto50 George St.TorontoOntarioM5S 3H4Canada 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2014年第14卷第11期

页      面：1438-1446页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by a Grant-in-Aid for Scientific Research (No. 24540231) supported by the U.S. National Science Foundation under Award (No. 1009203) 

主　　题：stars individual （GG Tauri） -- stars pre-maln sequence - techniques high angular resolution 

摘      要：A high angular resolution near-infrared image that shows the intensity of polarization for the GG Tau A binary system was obtained with the Subaru Telescope. The image shows a circumbinary disk scattering the light from the central binary. The azimuthal profile of the intensity of polarization for the circumbinary disk is roughly reproduced by a simple disk model with the Henyey-Greenstein phase function and the Rayleigh function, indicating there are small dust grains at the surface of the disk. Combined with a previous observation of the circumbinary disk, our image indicates that the gap structure in the circumbinary disk orbits counterclockwise, but material in the disk orbits clockwise. We propose that there is a shadow caused by material located between the central binary and the circumbinary disk. The separations and position angles of the stellar components of the binary in the past 20 yr are consistent with the binary orbit with a = 33.4 AU and e = 0.34.