Near-Infrared Imaging Polarimetry of Inner Region of GG Tau A Disk
| Title: | Near-Infrared Imaging Polarimetry of Inner Region of GG Tau A Disk |
|---|---|
| Authors: | Yang, Yi, Hashimoto, Jun, Hayashi, Saeko S., Tamura, Motohide, Mayama, Satoshi, Rafikov, Roman, Akiyama, Eiji, Carson, Joseph C., Janson, Markus, Kwon, Jungmi, de Leon, Jerome, Oh, Daehyeon, Takami, Michihiro, Tang, Ya-wen, Kudo, Tomoyuki, Kusakabe, Nobuhiko, Abe, Lyu, Brandner, Wolfgang, Brandt, Timothy D., Egner, Sebastian, Feldt, Markus, Goto, Miwa, Grady, Carol A., Guyon, Olivier, Hayano, Yutaka, Hayashi, Masahiko, Henning, Thomas, Hodapp, Klaus W., Ishi, Miki, Iye, Masanori, Kandori, Ryo, Knapp, Gillian R., Kuzuhara, Masayuki, Matsuo, Taro, Mcelwain, Michael W., Miyama, Shoken, Morino, Jun-Ichi, Moro-Martin, Amaya, Nishimura, Tetsuo, Pyo, Tae-Soo, Serabyn, Eugene, Suenaga, Takuya, Suto, Hiroshi, Suzuki, Ryuji, Takahashi, Yasuhiro H., Takato, Naruhisa, Terada, Hiroshi, Thalmann, Christian, Turner, Edwin L., Watanabe, Makoto, Wisniewski, John, Yamada, Toru, Takami, Hideki, Usuda, Tomonori |
| Source: | The Astronomical Journal, Volume 153, Issue 1, article id. 7, 9 pp. (2017) |
| Publication Year: | 2016 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics |
| More Details: | By performing non-masked polarization imaging with Subaru/HiCIAO, polarized scattered light from the inner region of the disk around the GG Tau A system was successfully detected in the $H$ band with a spatial resolution of approximately 0.07$\arcsec$, revealing the complicated inner disk structures around this young binary. This paper reports the observation of an arc-like structure to the north of GG Tau Ab and part of a circumstellar structure that is noticeable around GG Tau Aa extending to a distance of approximately 28 AU from the primary star. The speckle noise around GG Tau Ab constrains its disk radius to <13 AU. Based on the size of the circumbinary ring and the circumstellar disk around GG Tau Aa, the semi-major axis of the binary's orbit is likely to be 62 AU. A comparison of the present observations with previous ALMA and near-infrared (NIR) H$_2$ emission observations suggests that the north arc could be part of a large streamer flowing from the circumbinary ring to sustain the circumstellar disks. According to the previous studies, the circumstellar disk around GG Tau Aa has enough mass and can sustain itself for a duration sufficient for planet formation; thus, our study indicates that planets can form within close (separation $\lesssim$ 100 AU) young binary systems. Comment: Accepted for publication in AJ, 12 pages, 5 figures |
| Document Type: | Working Paper |
| DOI: | 10.3847/1538-3881/153/1/7 |
| Access URL: | http://arxiv.org/abs/1610.09134 |
| Accession Number: | edsarx.1610.09134 |
| Database: | arXiv |
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term="%22Takami%2C+Hideki%22">Takami, Hideki</searchLink><br /><searchLink fieldCode="AR" term="%22Usuda%2C+Tomonori%22">Usuda, Tomonori</searchLink> – Name: TitleSource Label: Source Group: Src Data: The Astronomical Journal, Volume 153, Issue 1, article id. 7, 9 pp. (2017) – Name: DatePubCY Label: Publication Year Group: Date Data: 2016 – Name: Subset Label: Collection Group: HoldingsInfo Data: Astrophysics – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+Earth+and+Planetary+Astrophysics%22">Astrophysics - Earth and Planetary Astrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics+-+Solar+and+Stellar+Astrophysics%22">Astrophysics - Solar and Stellar Astrophysics</searchLink> – Name: Abstract Label: Description Group: Ab Data: By performing non-masked polarization imaging with Subaru/HiCIAO, polarized scattered light from the inner region of the disk around the GG Tau A system was successfully detected in the $H$ band with a spatial resolution of approximately 0.07$\arcsec$, revealing the complicated inner disk structures around this young binary. This paper reports the observation of an arc-like structure to the north of GG Tau Ab and part of a circumstellar structure that is noticeable around GG Tau Aa extending to a distance of approximately 28 AU from the primary star. The speckle noise around GG Tau Ab constrains its disk radius to <13 AU. Based on the size of the circumbinary ring and the circumstellar disk around GG Tau Aa, the semi-major axis of the binary's orbit is likely to be 62 AU. A comparison of the present observations with previous ALMA and near-infrared (NIR) H$_2$ emission observations suggests that the north arc could be part of a large streamer flowing from the circumbinary ring to sustain the circumstellar disks. According to the previous studies, the circumstellar disk around GG Tau Aa has enough mass and can sustain itself for a duration sufficient for planet formation; thus, our study indicates that planets can form within close (separation $\lesssim$ 100 AU) young binary systems.<br />Comment: Accepted for publication in AJ, 12 pages, 5 figures – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.3847/1538-3881/153/1/7 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/1610.09134" linkWindow="_blank">http://arxiv.org/abs/1610.09134</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.1610.09134 |
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