Discovery of a disk gap candidate at 20 AU in TW Hydrae

E. Akiyama; T. Muto; N. Kusakabe; A. Kataoka; J. Hashimoto; T. Tsukagoshi; J. Kwon; T. Kudo; R. Kandori; C. A. Grady; M. Takami; M. Janson; M. Kuzuhara; T. Henning; M. L. Sitko; J. C. Carson; S. Mayama; T. Currie; C. Thalmann; J. Wisniewski; M. Momose; N. Ohashi; L. Abe; W. Brandner; T. D. Brandt; S. Egner; M. Feldt; M. Goto; O. Guyon; Y. Hayano; M. Hayashi; S. Hayashi; K. W. Hodapp; M. Ishi; M. Iye; G. R. Knapp; T. Matsuo; M. W. Mcelwain; S. Miyama; J. I. Morino; A. Moro-Martin; T. Nishimura; T. S. Pyo; G. Serabyn; T. Suenaga; H. Suto; R. Suzuki; Y. H. Takahashi; N. Takato; H. Terada; D. Tomono; E. L. Turner; M. Watanabe; T. Yamada; H. Takami; T. Usuda; M. Tamura

doi:10.1088/2041-8205/802/2/L17

Discovery of a disk gap candidate at 20 AU in TW Hydrae

E. Akiyama, T. Muto, N. Kusakabe, A. Kataoka, J. Hashimoto, T. Tsukagoshi, J. Kwon, T. Kudo, R. Kandori, C. A. Grady, M. Takami, M. Janson, M. Kuzuhara, T. Henning, M. L. Sitko, J. C. Carson, S. Mayama, T. Currie, C. Thalmann, J. WisniewskiM. Momose, N. Ohashi, L. Abe, W. Brandner, T. D. Brandt, S. Egner, M. Feldt, M. Goto, O. Guyon, Y. Hayano, M. Hayashi, S. Hayashi, K. W. Hodapp, M. Ishi, M. Iye, G. R. Knapp, T. Matsuo, M. W. Mcelwain, S. Miyama, J. I. Morino, A. Moro-Martin, T. Nishimura, T. S. Pyo, G. Serabyn, T. Suenaga, H. Suto, R. Suzuki, Y. H. Takahashi, N. Takato, H. Terada, D. Tomono, E. L. Turner, M. Watanabe, T. Yamada, H. Takami, T. Usuda, M. Tamura

Optical Sciences

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Abstract

We present a new Subaru/HiCIAO high-contrast H-band polarized intensity (PI) image of a nearby transitional disk associated with TW Hydrae. The scattered light from the disk was detected from 0″.2 to 1″.5 (11-81 AU) and the PI image shows a clear axisymmetric depression in PI at ∼0″.4 (∼20 AU) from the central star, similar to the ∼80 AU gap previously reported from Hubble Space Telescope images. The azimuthal PI profile also shows that the disk beyond 0″.2 is almost axisymmetric. We discuss two possible scenarios explaining the origin of the PI depression: (1) a gap structure may exist at ∼20 AU from the central star because of a shallow slope seen in the PI profile, and (2) grain growth may be occurring in the inner region of the disk. Multi-band observations at near-infrared and millimeter/submillimeter wavelengths play a complementary role in investigating dust opacity and may help reveal the origin of the gap more precisely.

Original language	English (US)
Article number	L17
Journal	Astrophysical Journal Letters
Volume	802
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/802/2/L17
State	Published - Apr 1 2015

Keywords

Planetary systems
Protoplanetary disks
Stars: individual (TW Hydrae)
Stars: pre-main sequence
Techniques: polarimetric

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/802/2/L17

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Akiyama, E., Muto, T., Kusakabe, N., Kataoka, A., Hashimoto, J., Tsukagoshi, T., Kwon, J., Kudo, T., Kandori, R., Grady, C. A., Takami, M., Janson, M., Kuzuhara, M., Henning, T., Sitko, M. L., Carson, J. C., Mayama, S., Currie, T., Thalmann, C., ... Tamura, M. (2015). Discovery of a disk gap candidate at 20 AU in TW Hydrae. Astrophysical Journal Letters, 802(2), Article L17. https://doi.org/10.1088/2041-8205/802/2/L17

Akiyama, E, Muto, T, Kusakabe, N, Kataoka, A, Hashimoto, J, Tsukagoshi, T, Kwon, J, Kudo, T, Kandori, R, Grady, CA, Takami, M, Janson, M, Kuzuhara, M, Henning, T, Sitko, ML, Carson, JC, Mayama, S, Currie, T, Thalmann, C, Wisniewski, J, Momose, M, Ohashi, N, Abe, L, Brandner, W, Brandt, TD, Egner, S, Feldt, M, Goto, M, Guyon, O, Hayano, Y, Hayashi, M, Hayashi, S, Hodapp, KW, Ishi, M, Iye, M, Knapp, GR, Matsuo, T, Mcelwain, MW, Miyama, S, Morino, JI, Moro-Martin, A, Nishimura, T, Pyo, TS, Serabyn, G, 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 2015, 'Discovery of a disk gap candidate at 20 AU in TW Hydrae', Astrophysical Journal Letters, vol. 802, no. 2, L17. https://doi.org/10.1088/2041-8205/802/2/L17

@article{6008ad39363846b78bcda2b6bd9fdec4,

title = "Discovery of a disk gap candidate at 20 AU in TW Hydrae",

abstract = "We present a new Subaru/HiCIAO high-contrast H-band polarized intensity (PI) image of a nearby transitional disk associated with TW Hydrae. The scattered light from the disk was detected from 0″.2 to 1″.5 (11-81 AU) and the PI image shows a clear axisymmetric depression in PI at ∼0″.4 (∼20 AU) from the central star, similar to the ∼80 AU gap previously reported from Hubble Space Telescope images. The azimuthal PI profile also shows that the disk beyond 0″.2 is almost axisymmetric. We discuss two possible scenarios explaining the origin of the PI depression: (1) a gap structure may exist at ∼20 AU from the central star because of a shallow slope seen in the PI profile, and (2) grain growth may be occurring in the inner region of the disk. Multi-band observations at near-infrared and millimeter/submillimeter wavelengths play a complementary role in investigating dust opacity and may help reveal the origin of the gap more precisely.",

keywords = "Planetary systems, Protoplanetary disks, Stars: individual (TW Hydrae), Stars: pre-main sequence, Techniques: polarimetric",

author = "E. Akiyama and T. Muto and N. Kusakabe and A. Kataoka and J. Hashimoto and T. Tsukagoshi and J. Kwon and T. Kudo and R. Kandori and Grady, {C. A.} and M. Takami and M. Janson and M. Kuzuhara and T. Henning and Sitko, {M. L.} and Carson, {J. C.} and S. Mayama and T. Currie and C. Thalmann and J. Wisniewski and M. Momose and N. Ohashi and L. Abe and W. Brandner and Brandt, {T. D.} and S. Egner and M. Feldt and M. Goto and O. Guyon and Y. Hayano and M. Hayashi and S. Hayashi and Hodapp, {K. W.} and M. Ishi and M. Iye and Knapp, {G. R.} and T. Matsuo and Mcelwain, {M. W.} and S. Miyama and Morino, {J. I.} and A. Moro-Martin and T. Nishimura and Pyo, {T. S.} and G. Serabyn and T. Suenaga and H. Suto and R. Suzuki and Takahashi, {Y. H.} and N. Takato and H. Terada and D. Tomono and Turner, {E. L.} and M. Watanabe and T. Yamada and H. Takami and T. Usuda and M. Tamura",

year = "2015",

month = apr,

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doi = "10.1088/2041-8205/802/2/L17",

language = "English (US)",

volume = "802",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

number = "2",

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TY - JOUR

T1 - Discovery of a disk gap candidate at 20 AU in TW Hydrae

AU - Akiyama, E.

AU - Muto, T.

AU - Kusakabe, N.

AU - Kataoka, A.

AU - Hashimoto, J.

AU - Tsukagoshi, T.

AU - Kwon, J.

AU - Kudo, T.

AU - Kandori, R.

AU - Grady, C. A.

AU - Takami, M.

AU - Janson, M.

AU - Kuzuhara, M.

AU - Henning, T.

AU - Sitko, M. L.

AU - Carson, J. C.

AU - Mayama, S.

AU - Currie, T.

AU - Thalmann, C.

AU - Wisniewski, J.

AU - Momose, M.

AU - Ohashi, N.

AU - Abe, L.

AU - Brandner, W.

AU - Brandt, T. D.

AU - Egner, S.

AU - Feldt, M.

AU - Goto, M.

AU - Guyon, O.

AU - Hayano, Y.

AU - Hayashi, M.

AU - Hayashi, S.

AU - Hodapp, K. W.

AU - Ishi, M.

AU - Iye, M.

AU - Knapp, G. R.

AU - Matsuo, T.

AU - Mcelwain, M. W.

AU - Miyama, S.

AU - Morino, J. I.

AU - Moro-Martin, A.

AU - Nishimura, T.

AU - Pyo, T. S.

AU - Serabyn, G.

AU - Suenaga, T.

AU - Suto, H.

AU - Suzuki, R.

AU - Takahashi, Y. H.

AU - Takato, N.

AU - Terada, H.

AU - Tomono, D.

AU - Turner, E. L.

AU - Watanabe, M.

AU - Yamada, T.

AU - Takami, H.

AU - Usuda, T.

AU - Tamura, M.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - We present a new Subaru/HiCIAO high-contrast H-band polarized intensity (PI) image of a nearby transitional disk associated with TW Hydrae. The scattered light from the disk was detected from 0″.2 to 1″.5 (11-81 AU) and the PI image shows a clear axisymmetric depression in PI at ∼0″.4 (∼20 AU) from the central star, similar to the ∼80 AU gap previously reported from Hubble Space Telescope images. The azimuthal PI profile also shows that the disk beyond 0″.2 is almost axisymmetric. We discuss two possible scenarios explaining the origin of the PI depression: (1) a gap structure may exist at ∼20 AU from the central star because of a shallow slope seen in the PI profile, and (2) grain growth may be occurring in the inner region of the disk. Multi-band observations at near-infrared and millimeter/submillimeter wavelengths play a complementary role in investigating dust opacity and may help reveal the origin of the gap more precisely.

AB - We present a new Subaru/HiCIAO high-contrast H-band polarized intensity (PI) image of a nearby transitional disk associated with TW Hydrae. The scattered light from the disk was detected from 0″.2 to 1″.5 (11-81 AU) and the PI image shows a clear axisymmetric depression in PI at ∼0″.4 (∼20 AU) from the central star, similar to the ∼80 AU gap previously reported from Hubble Space Telescope images. The azimuthal PI profile also shows that the disk beyond 0″.2 is almost axisymmetric. We discuss two possible scenarios explaining the origin of the PI depression: (1) a gap structure may exist at ∼20 AU from the central star because of a shallow slope seen in the PI profile, and (2) grain growth may be occurring in the inner region of the disk. Multi-band observations at near-infrared and millimeter/submillimeter wavelengths play a complementary role in investigating dust opacity and may help reveal the origin of the gap more precisely.

KW - Planetary systems

KW - Protoplanetary disks

KW - Stars: individual (TW Hydrae)

KW - Stars: pre-main sequence

KW - Techniques: polarimetric

UR - http://www.scopus.com/inward/record.url?scp=84926617545&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84926617545&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/802/2/L17

DO - 10.1088/2041-8205/802/2/L17

M3 - Article

AN - SCOPUS:84926617545

SN - 2041-8205

VL - 802

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L17

ER -

Discovery of a disk gap candidate at 20 AU in TW Hydrae

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Keywords

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