SPIRAL STRUCTURE and DIFFERENTIAL DUST SIZE DISTRIBUTION in the LkHα 330 DISK

Eiji Akiyama, Jun Hashimoto, Hauyu Baobabu Liu, Jennifer I.Hsiu Li, Michael Bonnefoy, Ruobing Dong, Yasuhiro Hasegawa, Thomas Henning, Michael L. Sitko, Markus Janson, Markus Feldt, John Wisniewski, Tomoyuki Kudo, Nobuhiko Kusakabe, Takashi Tsukagoshi, Munetake Momose, Takayuki Muto, Tetsuo Taki, Masayuki Kuzuhara, Mayama SatoshiMichihiro Takami, Nagayoshi Ohashi, Carol A. Grady, Jungmi Kwon, Christian Thalmann, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Joseph C. Carson, Sebastian Egner, Miwa Goto, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Gillian R. Knapp, Ryo Kandori, 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, Daigo Tomono, Edwin L. Turner, Makoto Watanabe, Toru Yamada, Hideki Takami, Tomonori Usuda, Motohide Tamura

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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 μm) linear polarimetric observations and 0.87 mm interferometric continuum observations toward a transitional disk around LkHα 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 (β) 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 () but are much smaller in the west side β=0.7+0.5 -0.4, 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.

Original languageEnglish (US)
Article number222
JournalAstronomical Journal
Volume152
Issue number6
DOIs
StatePublished - Dec 1 2016
Externally publishedYes

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dust
trapping
continuums
protoplanets
planetesimal
plotting
coagulation
spectral energy distribution
opacity
planets
near infrared
planet
polarization
slopes
wavelength
wavelengths
energy
distribution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Akiyama, E., Hashimoto, J., Liu, H. B., Li, J. I. H., Bonnefoy, M., Dong, R., ... Tamura, M. (2016). SPIRAL STRUCTURE and DIFFERENTIAL DUST SIZE DISTRIBUTION in the LkHα 330 DISK. Astronomical Journal, 152(6), [222]. https://doi.org/10.3847/1538-3881/152/6/222

SPIRAL STRUCTURE and DIFFERENTIAL DUST SIZE DISTRIBUTION in the LkHα 330 DISK. / Akiyama, Eiji; Hashimoto, Jun; Liu, Hauyu Baobabu; Li, Jennifer I.Hsiu; Bonnefoy, Michael; Dong, Ruobing; Hasegawa, Yasuhiro; Henning, Thomas; Sitko, Michael L.; Janson, Markus; Feldt, Markus; Wisniewski, John; Kudo, Tomoyuki; Kusakabe, Nobuhiko; Tsukagoshi, Takashi; Momose, Munetake; Muto, Takayuki; Taki, Tetsuo; Kuzuhara, Masayuki; Satoshi, Mayama; Takami, Michihiro; Ohashi, Nagayoshi; Grady, Carol A.; Kwon, Jungmi; Thalmann, Christian; Abe, Lyu; Brandner, Wolfgang; Brandt, Timothy D.; Carson, Joseph C.; Egner, Sebastian; Goto, Miwa; Guyon, Olivier; Hayano, Yutaka; Hayashi, Masahiko; Hayashi, Saeko S.; Hodapp, Klaus W.; Ishii, Miki; Iye, Masanori; Knapp, Gillian R.; Kandori, Ryo; 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; Tomono, Daigo; Turner, Edwin L.; Watanabe, Makoto; Yamada, Toru; Takami, Hideki; Usuda, Tomonori; Tamura, Motohide.

In: Astronomical Journal, Vol. 152, No. 6, 222, 01.12.2016.

Research output: Contribution to journalArticle

Akiyama, E, Hashimoto, J, Liu, HB, Li, JIH, Bonnefoy, M, Dong, R, Hasegawa, Y, Henning, T, Sitko, ML, Janson, M, Feldt, M, Wisniewski, J, Kudo, T, Kusakabe, N, Tsukagoshi, T, Momose, M, Muto, T, Taki, T, Kuzuhara, M, Satoshi, M, Takami, M, Ohashi, N, Grady, CA, Kwon, J, Thalmann, C, Abe, L, Brandner, W, Brandt, TD, Carson, JC, Egner, S, Goto, M, Guyon, O, Hayano, Y, Hayashi, M, Hayashi, SS, Hodapp, KW, Ishii, M, Iye, M, Knapp, GR, Kandori, R, Matsuo, T, McElwain, MW, Miyama, S, Morino, JI, Moro-Martin, A, Nishimura, T, Pyo, TS, Serabyn, E, Suenaga, T, Suto, H, Suzuki, R, Takahashi, YH, Takato, N, Terada, H, Tomono, D, Turner, EL, Watanabe, M, Yamada, T, Takami, H, Usuda, T & Tamura, M 2016, 'SPIRAL STRUCTURE and DIFFERENTIAL DUST SIZE DISTRIBUTION in the LkHα 330 DISK', Astronomical Journal, vol. 152, no. 6, 222. https://doi.org/10.3847/1538-3881/152/6/222
Akiyama E, Hashimoto J, Liu HB, Li JIH, Bonnefoy M, Dong R et al. SPIRAL STRUCTURE and DIFFERENTIAL DUST SIZE DISTRIBUTION in the LkHα 330 DISK. Astronomical Journal. 2016 Dec 1;152(6). 222. https://doi.org/10.3847/1538-3881/152/6/222
Akiyama, Eiji ; Hashimoto, Jun ; Liu, Hauyu Baobabu ; Li, Jennifer I.Hsiu ; Bonnefoy, Michael ; Dong, Ruobing ; Hasegawa, Yasuhiro ; Henning, Thomas ; Sitko, Michael L. ; Janson, Markus ; Feldt, Markus ; Wisniewski, John ; Kudo, Tomoyuki ; Kusakabe, Nobuhiko ; Tsukagoshi, Takashi ; Momose, Munetake ; Muto, Takayuki ; Taki, Tetsuo ; Kuzuhara, Masayuki ; Satoshi, Mayama ; Takami, Michihiro ; Ohashi, Nagayoshi ; Grady, Carol A. ; Kwon, Jungmi ; Thalmann, Christian ; Abe, Lyu ; Brandner, Wolfgang ; Brandt, Timothy D. ; Carson, Joseph C. ; Egner, Sebastian ; Goto, Miwa ; Guyon, Olivier ; Hayano, Yutaka ; Hayashi, Masahiko ; Hayashi, Saeko S. ; Hodapp, Klaus W. ; Ishii, Miki ; Iye, Masanori ; Knapp, Gillian R. ; Kandori, Ryo ; 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 ; Tomono, Daigo ; Turner, Edwin L. ; Watanabe, Makoto ; Yamada, Toru ; Takami, Hideki ; Usuda, Tomonori ; Tamura, Motohide. / SPIRAL STRUCTURE and DIFFERENTIAL DUST SIZE DISTRIBUTION in the LkHα 330 DISK. In: Astronomical Journal. 2016 ; Vol. 152, No. 6.
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AU - Akiyama, Eiji

AU - Hashimoto, Jun

AU - Liu, Hauyu Baobabu

AU - Li, Jennifer I.Hsiu

AU - Bonnefoy, Michael

AU - Dong, Ruobing

AU - Hasegawa, Yasuhiro

AU - Henning, Thomas

AU - Sitko, Michael L.

AU - Janson, Markus

AU - Feldt, Markus

AU - Wisniewski, John

AU - Kudo, Tomoyuki

AU - Kusakabe, Nobuhiko

AU - Tsukagoshi, Takashi

AU - Momose, Munetake

AU - Muto, Takayuki

AU - Taki, Tetsuo

AU - Kuzuhara, Masayuki

AU - Satoshi, Mayama

AU - Takami, Michihiro

AU - Ohashi, Nagayoshi

AU - Grady, Carol A.

AU - Kwon, Jungmi

AU - Thalmann, Christian

AU - Abe, Lyu

AU - Brandner, Wolfgang

AU - Brandt, Timothy D.

AU - Carson, Joseph C.

AU - Egner, Sebastian

AU - Goto, Miwa

AU - Guyon, Olivier

AU - Hayano, Yutaka

AU - Hayashi, Masahiko

AU - Hayashi, Saeko S.

AU - Hodapp, Klaus W.

AU - Ishii, Miki

AU - Iye, Masanori

AU - Knapp, Gillian R.

AU - Kandori, Ryo

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AU - McElwain, Michael W.

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AU - Morino, Jun Ichi

AU - Moro-Martin, Amaya

AU - Nishimura, Tetsuo

AU - Pyo, Tae Soo

AU - Serabyn, Eugene

AU - Suenaga, Takuya

AU - Suto, Hiroshi

AU - Suzuki, Ryuji

AU - Takahashi, Yasuhiro H.

AU - Takato, Naruhisa

AU - Terada, Hiroshi

AU - Tomono, Daigo

AU - Turner, Edwin L.

AU - Watanabe, Makoto

AU - Yamada, Toru

AU - Takami, Hideki

AU - Usuda, Tomonori

AU - Tamura, Motohide

PY - 2016/12/1

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