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SPIRAL STRUCTURE AN...
SPIRAL STRUCTURE AND DIFFERENTIAL DUST SIZE DISTRIBUTION IN THE LkH alpha 330 DISK
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Akiyama, Eiji (author)
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Hashimoto, Jun (author)
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Liu, Hauyu Baobabu (author)
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Li, Jennifer I-Hsiu (author)
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Bonnefoy, Michael (author)
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Dong, Ruobing (author)
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Hasegawa, Yasuhiro (author)
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Henning, Thomas (author)
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Sitko, Michael L. (author)
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- Janson, Markus (author)
- Stockholms universitet,Institutionen för astronomi
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Feldt, Markus (author)
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Wisniewski, John (author)
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Kudo, Tomoyuki (author)
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Kusakabe, Nobuhiko (author)
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Tsukagoshi, Takashi (author)
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Momose, Munetake (author)
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Muto, Takayuki (author)
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Taki, Tetsuo (author)
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Kuzuhara, Masayuki (author)
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Satoshi, Mayama (author)
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Takami, Michihiro (author)
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Ohashi, Nagayoshi (author)
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Grady, Carol A. (author)
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Kwon, Jungmi (author)
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Thalmann, Christian (author)
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Abe, Lyu (author)
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Brandner, Wolfgang (author)
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Brandt, Timothy D. (author)
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Carson, Joseph C. (author)
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Egner, Sebastian (author)
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Goto, Miwa (author)
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Guyon, Olivier (author)
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Hayano, Yutaka (author)
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Hayashi, Masahiko (author)
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Hayashi, Saeko S. (author)
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Hodapp, Klaus W. (author)
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Ishii, Miki (author)
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Iye, Masanori (author)
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Knapp, Gillian R. (author)
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Kandori, Ryo (author)
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Matsuo, Taro (author)
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Mcelwain, Michael W. (author)
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Miyama, Shoken (author)
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Morino, Jun-Ichi (author)
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Moro-Martin, Amaya (author)
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Nishimura, Tetsuo (author)
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Pyo, Tae-Soo (author)
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Serabyn, Eugene (author)
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Suenaga, Takuya (author)
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Suto, Hiroshi (author)
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Suzuki, Ryuji (author)
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Takahashi, Yasuhiro H. (author)
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Takato, Naruhisa (author)
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Terada, Hiroshi (author)
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Tomono, Daigo (author)
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Turner, Edwin L. (author)
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Watanabe, Makoto (author)
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Yamada, Toru (author)
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Takami, Hideki (author)
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Usuda, Tomonori (author)
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Tamura, Motohide (author)
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(creator_code:org_t)
- 2016-12-07
- 2016
- English.
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In: Astronomical Journal. - : American Astronomical Society. - 0004-6256 .- 1538-3881. ; 152:6
- Related links:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
Close
- Dust trapping accelerates the coagulation of dust particles, and, thus, it represents an initial step toward the formation of planetesimals. We report H-band (1.6 mu m) linear polarimetric observations and 0.87 mm interferometric continuum observations toward a transitional disk around LkH alpha 330. As a. result, a pair of spiral arms were detected in the H-band emission, and an asymmetric (potentially arm-like) structure was detected in the 0.87 mm continuum emission. We discuss the origin of the spiral arm and the asymmetric structure. and suggest that a massive unseen planet is the most plausible explanation. The possibility of dust trapping and grain growth causing the asymmetric structure was also investigated through the opacity index (beta) by plotting the observed spectral energy distribution slope between 0.87 mm from our Submillimeter Array observation and 1.3 mm from literature. The results imply that grains are indistinguishable from interstellar medium-like dust in the east side (beta = 2.0 +/- 0.5) but are much smaller in the west side beta = 0.7(-0.4)(+0.5), indicating differential dust size distribution between the two sides of the disk. Combining the results of near-infrared and submillimeter observations, we conjecture that the spiral arms exist at the upper surface and an asymmetric structure resides in the disk interior. Future observations at centimeter wavelengths and differential polarization imaging in other bands (Y-K) with extreme AO imagers are required to understand how large dust grains form and to further explore the dust distribution in the disk.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- planetary systems
- stars: pre-main sequence
- stars: individual (LkH alpha 330)
- techniques: interferometric
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Akiyama, Eiji
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Hashimoto, Jun
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Liu, Hauyu Baoba ...
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Li, Jennifer I-H ...
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Bonnefoy, Michae ...
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Dong, Ruobing
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show more...
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Hasegawa, Yasuhi ...
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Henning, Thomas
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Sitko, Michael L ...
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Janson, Markus
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Feldt, Markus
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Wisniewski, John
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Kudo, Tomoyuki
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Kusakabe, Nobuhi ...
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Tsukagoshi, Taka ...
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Momose, Munetake
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Muto, Takayuki
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Taki, Tetsuo
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Kuzuhara, Masayu ...
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Satoshi, Mayama
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Takami, Michihir ...
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Ohashi, Nagayosh ...
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Grady, Carol A.
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Kwon, Jungmi
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Thalmann, Christ ...
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Abe, Lyu
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Brandner, Wolfga ...
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Brandt, Timothy ...
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Carson, Joseph C ...
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Egner, Sebastian
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Goto, Miwa
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Guyon, Olivier
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Hayano, Yutaka
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Hayashi, Masahik ...
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Hayashi, Saeko S ...
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Hodapp, Klaus W.
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Ishii, Miki
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Iye, Masanori
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Knapp, Gillian R ...
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Kandori, Ryo
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Matsuo, Taro
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Mcelwain, Michae ...
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Miyama, Shoken
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Morino, Jun-Ichi
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Moro-Martin, Ama ...
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Nishimura, Tetsu ...
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Pyo, Tae-Soo
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Serabyn, Eugene
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Suenaga, Takuya
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Suto, Hiroshi
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Suzuki, Ryuji
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Takahashi, Yasuh ...
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Takato, Naruhisa
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Terada, Hiroshi
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Tomono, Daigo
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Turner, Edwin L.
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Watanabe, Makoto
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Yamada, Toru
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Takami, Hideki
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Usuda, Tomonori
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Tamura, Motohide
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astronomical Jou ...
- By the university
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Stockholm University