Discovery of small-scale spiral structures in the disk of SAO 206462 (HD135344B): Implications for the physical state of the disk from spiral density wave theory

T. Muto, C. A. Grady, J. Hashimoto, M. Fukagawa, J. B. Hornbeck, M. Sitko, R. Russell, C. Werren, M. Curé, T. Currie, N. Ohashi, Y. Okamoto, M. Momose, M. Honda, S. Inutsuka, T. Takeuchi, R. Dong, L. Abe, W. Brandner, T. BrandtJ. Carson, S. Egner, M. Feldt, T. Fukue, M. Goto, Olivier Guyon, Y. Hayano, M. Hayashi, S. Hayashi, T. Henning, K. W. Hodapp, M. Ishii, M. Iye, M. Janson, R. Kandori, G. R. Knapp, T. Kudo, N. Kusakabe, M. Kuzuhara, T. Matsuo, S. Mayama, M. W. McElwain, S. Miyama, J. I. Morino, A. Moro-Martin, T. Nishimura, T. S. Pyo, E. Serabyn, H. Suto, R. Suzuki, M. Takami, N. Takato, H. Terada, C. Thalmann, D. Tomono, E. L. Turner, M. Watanabe, J. P. Wisniewski, T. Yamada, H. Takami, T. Usuda, M. Tamura

Research output: Contribution to journalArticle

207 Citations (Scopus)

Abstract

We present high-resolution, H-band imaging observations, collected with Subaru/HiCIAO, of the scattered light from the transitional disk around SAO 206462 (HD135344B). Although previous sub-mm imagery suggested the existence of a dust-depleted cavity at r ≤ 46 AU, our observations reveal the presence of scattered light components as close as 02 ( 28 AU) from the star. Moreover, we have discovered two small-scale spiral structures lying within 05 ( 70 AU). We present models for the spiral structures using the spiral density wave theory, and derive a disk aspect ratio of h 0.1, which is consistent with previous sub-mm observations. This model can potentially give estimates of the temperature and rotation profiles of the disk based on dynamical processes, independently from sub-mm observations. It also predicts the evolution of the spiral structures, which can be observable on timescales of 10-20 years, providing conclusive tests of the model. While we cannot uniquely identify the origin of these spirals, planets embedded in the disk may be capable of exciting the observed morphology. Assuming that this is the case, we can make predictions on the locations and, possibly, the masses of the unseen planets. Such planets may be detected by future multi-wavelength observations.

Original languageEnglish (US)
Article numberL22
JournalAstrophysical Journal Letters
Volume748
Issue number2
DOIs
StatePublished - Apr 1 2012
Externally publishedYes

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planet
planets
cavity
imagery
dust
wavelength
timescale
temperature profiles
aspect ratio
prediction
stars
temperature
cavities
high resolution
estimates
profiles
predictions
wavelengths
test

Keywords

  • circumstellar matter
  • instrumentation: high angular resolution
  • polarization
  • protoplanetary disks
  • stars: individual (SAO 206462, HD 135344B)
  • waves

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Discovery of small-scale spiral structures in the disk of SAO 206462 (HD135344B) : Implications for the physical state of the disk from spiral density wave theory. / Muto, T.; Grady, C. A.; Hashimoto, J.; Fukagawa, M.; Hornbeck, J. B.; Sitko, M.; Russell, R.; Werren, C.; Curé, M.; Currie, T.; Ohashi, N.; Okamoto, Y.; Momose, M.; Honda, M.; Inutsuka, S.; Takeuchi, T.; Dong, R.; Abe, L.; Brandner, W.; Brandt, T.; Carson, J.; Egner, S.; Feldt, M.; Fukue, T.; Goto, M.; Guyon, Olivier; Hayano, Y.; Hayashi, M.; Hayashi, S.; Henning, T.; Hodapp, K. W.; Ishii, M.; Iye, M.; Janson, M.; Kandori, R.; Knapp, G. R.; Kudo, T.; Kusakabe, N.; Kuzuhara, M.; Matsuo, T.; Mayama, S.; McElwain, M. W.; Miyama, S.; Morino, J. I.; Moro-Martin, A.; Nishimura, T.; Pyo, T. S.; Serabyn, E.; Suto, H.; Suzuki, R.; Takami, M.; Takato, N.; Terada, H.; Thalmann, C.; Tomono, D.; Turner, E. L.; Watanabe, M.; Wisniewski, J. P.; Yamada, T.; Takami, H.; Usuda, T.; Tamura, M.

In: Astrophysical Journal Letters, Vol. 748, No. 2, L22, 01.04.2012.

Research output: Contribution to journalArticle

Muto, T, Grady, CA, Hashimoto, J, Fukagawa, M, Hornbeck, JB, Sitko, M, Russell, R, Werren, C, Curé, M, Currie, T, Ohashi, N, Okamoto, Y, Momose, M, Honda, M, Inutsuka, S, Takeuchi, T, Dong, R, Abe, L, Brandner, W, Brandt, T, Carson, J, Egner, S, Feldt, M, Fukue, T, Goto, M, Guyon, O, Hayano, Y, Hayashi, M, Hayashi, S, Henning, T, Hodapp, KW, Ishii, M, Iye, M, Janson, M, Kandori, R, Knapp, GR, Kudo, T, Kusakabe, N, Kuzuhara, M, Matsuo, T, Mayama, S, McElwain, MW, Miyama, S, Morino, JI, Moro-Martin, A, Nishimura, T, Pyo, TS, Serabyn, E, Suto, H, Suzuki, R, Takami, M, Takato, N, Terada, H, Thalmann, C, Tomono, D, Turner, EL, Watanabe, M, Wisniewski, JP, Yamada, T, Takami, H, Usuda, T & Tamura, M 2012, 'Discovery of small-scale spiral structures in the disk of SAO 206462 (HD135344B): Implications for the physical state of the disk from spiral density wave theory', Astrophysical Journal Letters, vol. 748, no. 2, L22. https://doi.org/10.1088/2041-8205/748/2/L22
Muto, T. ; Grady, C. A. ; Hashimoto, J. ; Fukagawa, M. ; Hornbeck, J. B. ; Sitko, M. ; Russell, R. ; Werren, C. ; Curé, M. ; Currie, T. ; Ohashi, N. ; Okamoto, Y. ; Momose, M. ; Honda, M. ; Inutsuka, S. ; Takeuchi, T. ; Dong, R. ; Abe, L. ; Brandner, W. ; Brandt, T. ; Carson, J. ; Egner, S. ; Feldt, M. ; Fukue, T. ; Goto, M. ; Guyon, Olivier ; Hayano, Y. ; Hayashi, M. ; Hayashi, S. ; Henning, T. ; Hodapp, K. W. ; Ishii, M. ; Iye, M. ; Janson, M. ; Kandori, R. ; Knapp, G. R. ; Kudo, T. ; Kusakabe, N. ; Kuzuhara, M. ; Matsuo, T. ; Mayama, S. ; McElwain, M. W. ; Miyama, S. ; Morino, J. I. ; Moro-Martin, A. ; Nishimura, T. ; Pyo, T. S. ; Serabyn, E. ; Suto, H. ; Suzuki, R. ; Takami, M. ; Takato, N. ; Terada, H. ; Thalmann, C. ; Tomono, D. ; Turner, E. L. ; Watanabe, M. ; Wisniewski, J. P. ; Yamada, T. ; Takami, H. ; Usuda, T. ; Tamura, M. / Discovery of small-scale spiral structures in the disk of SAO 206462 (HD135344B) : Implications for the physical state of the disk from spiral density wave theory. In: Astrophysical Journal Letters. 2012 ; Vol. 748, No. 2.
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abstract = "We present high-resolution, H-band imaging observations, collected with Subaru/HiCIAO, of the scattered light from the transitional disk around SAO 206462 (HD135344B). Although previous sub-mm imagery suggested the existence of a dust-depleted cavity at r ≤ 46 AU, our observations reveal the presence of scattered light components as close as 02 ( 28 AU) from the star. Moreover, we have discovered two small-scale spiral structures lying within 05 ( 70 AU). We present models for the spiral structures using the spiral density wave theory, and derive a disk aspect ratio of h 0.1, which is consistent with previous sub-mm observations. This model can potentially give estimates of the temperature and rotation profiles of the disk based on dynamical processes, independently from sub-mm observations. It also predicts the evolution of the spiral structures, which can be observable on timescales of 10-20 years, providing conclusive tests of the model. While we cannot uniquely identify the origin of these spirals, planets embedded in the disk may be capable of exciting the observed morphology. Assuming that this is the case, we can make predictions on the locations and, possibly, the masses of the unseen planets. Such planets may be detected by future multi-wavelength observations.",
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TY - JOUR

T1 - Discovery of small-scale spiral structures in the disk of SAO 206462 (HD135344B)

T2 - Implications for the physical state of the disk from spiral density wave theory

AU - Muto, T.

AU - Grady, C. A.

AU - Hashimoto, J.

AU - Fukagawa, M.

AU - Hornbeck, J. B.

AU - Sitko, M.

AU - Russell, R.

AU - Werren, C.

AU - Curé, M.

AU - Currie, T.

AU - Ohashi, N.

AU - Okamoto, Y.

AU - Momose, M.

AU - Honda, M.

AU - Inutsuka, S.

AU - Takeuchi, T.

AU - Dong, R.

AU - Abe, L.

AU - Brandner, W.

AU - Brandt, T.

AU - Carson, J.

AU - Egner, S.

AU - Feldt, M.

AU - Fukue, T.

AU - Goto, M.

AU - Guyon, Olivier

AU - Hayano, Y.

AU - Hayashi, M.

AU - Hayashi, S.

AU - Henning, T.

AU - Hodapp, K. W.

AU - Ishii, M.

AU - Iye, M.

AU - Janson, M.

AU - Kandori, R.

AU - Knapp, G. R.

AU - Kudo, T.

AU - Kusakabe, N.

AU - Kuzuhara, M.

AU - Matsuo, T.

AU - Mayama, S.

AU - McElwain, M. W.

AU - Miyama, S.

AU - Morino, J. I.

AU - Moro-Martin, A.

AU - Nishimura, T.

AU - Pyo, T. S.

AU - Serabyn, E.

AU - Suto, H.

AU - Suzuki, R.

AU - Takami, M.

AU - Takato, N.

AU - Terada, H.

AU - Thalmann, C.

AU - Tomono, D.

AU - Turner, E. L.

AU - Watanabe, M.

AU - Wisniewski, J. P.

AU - Yamada, T.

AU - Takami, H.

AU - Usuda, T.

AU - Tamura, M.

PY - 2012/4/1

Y1 - 2012/4/1

N2 - We present high-resolution, H-band imaging observations, collected with Subaru/HiCIAO, of the scattered light from the transitional disk around SAO 206462 (HD135344B). Although previous sub-mm imagery suggested the existence of a dust-depleted cavity at r ≤ 46 AU, our observations reveal the presence of scattered light components as close as 02 ( 28 AU) from the star. Moreover, we have discovered two small-scale spiral structures lying within 05 ( 70 AU). We present models for the spiral structures using the spiral density wave theory, and derive a disk aspect ratio of h 0.1, which is consistent with previous sub-mm observations. This model can potentially give estimates of the temperature and rotation profiles of the disk based on dynamical processes, independently from sub-mm observations. It also predicts the evolution of the spiral structures, which can be observable on timescales of 10-20 years, providing conclusive tests of the model. While we cannot uniquely identify the origin of these spirals, planets embedded in the disk may be capable of exciting the observed morphology. Assuming that this is the case, we can make predictions on the locations and, possibly, the masses of the unseen planets. Such planets may be detected by future multi-wavelength observations.

AB - We present high-resolution, H-band imaging observations, collected with Subaru/HiCIAO, of the scattered light from the transitional disk around SAO 206462 (HD135344B). Although previous sub-mm imagery suggested the existence of a dust-depleted cavity at r ≤ 46 AU, our observations reveal the presence of scattered light components as close as 02 ( 28 AU) from the star. Moreover, we have discovered two small-scale spiral structures lying within 05 ( 70 AU). We present models for the spiral structures using the spiral density wave theory, and derive a disk aspect ratio of h 0.1, which is consistent with previous sub-mm observations. This model can potentially give estimates of the temperature and rotation profiles of the disk based on dynamical processes, independently from sub-mm observations. It also predicts the evolution of the spiral structures, which can be observable on timescales of 10-20 years, providing conclusive tests of the model. While we cannot uniquely identify the origin of these spirals, planets embedded in the disk may be capable of exciting the observed morphology. Assuming that this is the case, we can make predictions on the locations and, possibly, the masses of the unseen planets. Such planets may be detected by future multi-wavelength observations.

KW - circumstellar matter

KW - instrumentation: high angular resolution

KW - polarization

KW - protoplanetary disks

KW - stars: individual (SAO 206462, HD 135344B)

KW - waves

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JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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