A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK

Daehyeon Oh; Jun Hashimoto; Joseph C. Carson; Markus Janson; Jungmi Kwon; Takao Nakagawa; Satoshi Mayama; Taichi Uyama; Yi Yang; Tomoyuki Kudo; Nobuhiko Kusakabe; Lyu Abe; Eiji Akiyama; Wolfgang Brandner; Timothy D. Brandt; Thayne Currie; Markus Feldt; Miwa Goto; Carol A. Grady; Olivier Guyon; Yutaka Hayano; Masahiko Hayashi; Saeko S. Hayashi; Thomas Henning; Klaus W. Hodapp; Miki Ishii; Masanori Iye; Ryo Kandori; Gillian R. Knapp; Masayuki Kuzuhara; 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; Christian Thalmann; Edwin L. Turner; Makoto Watanabe; Toru Yamada; Hideki Takami; Tomonori Usuda; Motohide Tamura

doi:10.3847/2041-8205/831/1/L7

A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK

Daehyeon Oh, Jun Hashimoto, Joseph C. Carson, Markus Janson, Jungmi Kwon, Takao Nakagawa, Satoshi Mayama, Taichi Uyama, Yi Yang, Tomoyuki Kudo, Nobuhiko Kusakabe, Lyu Abe, Eiji Akiyama, Wolfgang Brandner, Timothy D. Brandt, Thayne Currie, Markus Feldt, Miwa Goto, Carol A. Grady, Olivier GuyonYutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Ryo Kandori, Gillian R. Knapp, Masayuki Kuzuhara, 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, Christian Thalmann, Edwin L. Turner, Makoto Watanabe, Toru Yamada, Hideki Takami, Tomonori Usuda, Motohide Tamura

Astrophysical Sciences

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Abstract

We present high-contrast H-band polarized intensity (PI) images of the transitional disk around the young solar-like star GM Aur. The near-infrared direct imaging of the disk was derived by polarimetric differential imaging using the Subaru 8.2 m Telescope and HiCIAO. An angular resolution and an inner working angle of 0.″07 and r ∼ 0.″05, respectively, were obtained. We clearly resolved a large inner cavity, with a measured radius of 18 ±2 au, which is smaller than that of a submillimeter interferometric image (28 au). This discrepancy in the cavity radii at near-infrared and submillimeter wavelengths may be caused by a 3-4 M _Jup planet about 20 au away from the star, near the edge of the cavity. The presence of a near-infrared inner cavity is a strong constraint on hypotheses for inner cavity formation in a transitional disk. A dust filtration mechanism has been proposed to explain the large cavity in the submillimeter image, but our results suggest that this mechanism must be combined with an additional process. We found that the PI slope of the outer disk is significantly different from the intensity slope obtained from HST/NICMOS, and this difference may indicate the grain growth process in the disk.

Original language	English (US)
Article number	L7
Journal	Astrophysical Journal Letters
Volume	831
Issue number	1
DOIs	https://doi.org/10.3847/2041-8205/831/1/L7
State	Published - Nov 1 2016

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

circumstellar matter
protoplanetary disks
stars: individual (GM Aur)
stars: pre-main sequence

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10.3847/2041-8205/831/1/L7

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Oh, D., Hashimoto, J., Carson, J. C., Janson, M., Kwon, J., Nakagawa, T., Mayama, S., Uyama, T., Yang, Y., Kudo, T., Kusakabe, N., Abe, L., Akiyama, E., Brandner, W., Brandt, T. D., Currie, T., Feldt, M., Goto, M., Grady, C. A., ... Tamura, M. (2016). A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK. Astrophysical Journal Letters, 831(1), Article L7. https://doi.org/10.3847/2041-8205/831/1/L7

@article{64654dea5bcf4c8eafebb2b1943e3417,

title = "A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK",

abstract = "We present high-contrast H-band polarized intensity (PI) images of the transitional disk around the young solar-like star GM Aur. The near-infrared direct imaging of the disk was derived by polarimetric differential imaging using the Subaru 8.2 m Telescope and HiCIAO. An angular resolution and an inner working angle of 0.″07 and r ∼ 0.″05, respectively, were obtained. We clearly resolved a large inner cavity, with a measured radius of 18 ±2 au, which is smaller than that of a submillimeter interferometric image (28 au). This discrepancy in the cavity radii at near-infrared and submillimeter wavelengths may be caused by a 3-4 M Jup planet about 20 au away from the star, near the edge of the cavity. The presence of a near-infrared inner cavity is a strong constraint on hypotheses for inner cavity formation in a transitional disk. A dust filtration mechanism has been proposed to explain the large cavity in the submillimeter image, but our results suggest that this mechanism must be combined with an additional process. We found that the PI slope of the outer disk is significantly different from the intensity slope obtained from HST/NICMOS, and this difference may indicate the grain growth process in the disk.",

keywords = "circumstellar matter, protoplanetary disks, stars: individual (GM Aur), stars: pre-main sequence",

author = "Daehyeon Oh and Jun Hashimoto and Carson, {Joseph C.} and Markus Janson and Jungmi Kwon and Takao Nakagawa and Satoshi Mayama and Taichi Uyama and Yi Yang and Tomoyuki Kudo and Nobuhiko Kusakabe and Lyu Abe and Eiji Akiyama and Wolfgang Brandner and Brandt, {Timothy D.} and Thayne Currie and Markus Feldt and Miwa Goto and Grady, {Carol A.} and Olivier Guyon and Yutaka Hayano and Masahiko Hayashi and Hayashi, {Saeko S.} and Thomas Henning and Hodapp, {Klaus W.} and Miki Ishii and Masanori Iye and Ryo Kandori and Knapp, {Gillian R.} and Masayuki Kuzuhara and Taro Matsuo and McElwain, {Michael W.} and Shoken Miyama and Morino, {Jun Ichi} and Amaya Moro-Martin and Tetsuo Nishimura and Pyo, {Tae Soo} and Eugene Serabyn and Takuya Suenaga and Hiroshi Suto and Ryuji Suzuki and Takahashi, {Yasuhiro H.} and Naruhisa Takato and Hiroshi Terada and Christian Thalmann and Turner, {Edwin L.} and Makoto Watanabe and Toru Yamada and Hideki Takami and Tomonori Usuda and Motohide Tamura",

year = "2016",

month = nov,

day = "1",

doi = "10.3847/2041-8205/831/1/L7",

language = "English (US)",

volume = "831",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1",

}

Oh, D, Hashimoto, J, Carson, JC, Janson, M, Kwon, J, Nakagawa, T, Mayama, S, Uyama, T, Yang, Y, Kudo, T, Kusakabe, N, Abe, L, Akiyama, E, Brandner, W, Brandt, TD, Currie, T, Feldt, M, Goto, M, Grady, CA, Guyon, O, Hayano, Y, Hayashi, M, Hayashi, SS, Henning, T, Hodapp, KW, Ishii, M, Iye, M, Kandori, R, Knapp, GR, Kuzuhara, M, 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, Thalmann, C, Turner, EL, Watanabe, M, Yamada, T, Takami, H, Usuda, T & Tamura, M 2016, 'A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK', Astrophysical Journal Letters, vol. 831, no. 1, L7. https://doi.org/10.3847/2041-8205/831/1/L7

TY - JOUR

T1 - A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK

AU - Oh, Daehyeon

AU - Hashimoto, Jun

AU - Carson, Joseph C.

AU - Janson, Markus

AU - Kwon, Jungmi

AU - Nakagawa, Takao

AU - Mayama, Satoshi

AU - Uyama, Taichi

AU - Yang, Yi

AU - Kudo, Tomoyuki

AU - Kusakabe, Nobuhiko

AU - Abe, Lyu

AU - Akiyama, Eiji

AU - Brandner, Wolfgang

AU - Brandt, Timothy D.

AU - Currie, Thayne

AU - Feldt, Markus

AU - Goto, Miwa

AU - Grady, Carol A.

AU - Guyon, Olivier

AU - Hayano, Yutaka

AU - Hayashi, Masahiko

AU - Hayashi, Saeko S.

AU - Henning, Thomas

AU - Hodapp, Klaus W.

AU - Ishii, Miki

AU - Iye, Masanori

AU - Kandori, Ryo

AU - Knapp, Gillian R.

AU - Kuzuhara, Masayuki

AU - Matsuo, Taro

AU - McElwain, Michael W.

AU - Miyama, Shoken

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 - Thalmann, Christian

AU - Turner, Edwin L.

AU - Watanabe, Makoto

AU - Yamada, Toru

AU - Takami, Hideki

AU - Usuda, Tomonori

AU - Tamura, Motohide

PY - 2016/11/1

Y1 - 2016/11/1

N2 - We present high-contrast H-band polarized intensity (PI) images of the transitional disk around the young solar-like star GM Aur. The near-infrared direct imaging of the disk was derived by polarimetric differential imaging using the Subaru 8.2 m Telescope and HiCIAO. An angular resolution and an inner working angle of 0.″07 and r ∼ 0.″05, respectively, were obtained. We clearly resolved a large inner cavity, with a measured radius of 18 ±2 au, which is smaller than that of a submillimeter interferometric image (28 au). This discrepancy in the cavity radii at near-infrared and submillimeter wavelengths may be caused by a 3-4 M Jup planet about 20 au away from the star, near the edge of the cavity. The presence of a near-infrared inner cavity is a strong constraint on hypotheses for inner cavity formation in a transitional disk. A dust filtration mechanism has been proposed to explain the large cavity in the submillimeter image, but our results suggest that this mechanism must be combined with an additional process. We found that the PI slope of the outer disk is significantly different from the intensity slope obtained from HST/NICMOS, and this difference may indicate the grain growth process in the disk.

AB - We present high-contrast H-band polarized intensity (PI) images of the transitional disk around the young solar-like star GM Aur. The near-infrared direct imaging of the disk was derived by polarimetric differential imaging using the Subaru 8.2 m Telescope and HiCIAO. An angular resolution and an inner working angle of 0.″07 and r ∼ 0.″05, respectively, were obtained. We clearly resolved a large inner cavity, with a measured radius of 18 ±2 au, which is smaller than that of a submillimeter interferometric image (28 au). This discrepancy in the cavity radii at near-infrared and submillimeter wavelengths may be caused by a 3-4 M Jup planet about 20 au away from the star, near the edge of the cavity. The presence of a near-infrared inner cavity is a strong constraint on hypotheses for inner cavity formation in a transitional disk. A dust filtration mechanism has been proposed to explain the large cavity in the submillimeter image, but our results suggest that this mechanism must be combined with an additional process. We found that the PI slope of the outer disk is significantly different from the intensity slope obtained from HST/NICMOS, and this difference may indicate the grain growth process in the disk.

KW - circumstellar matter

KW - protoplanetary disks

KW - stars: individual (GM Aur)

KW - stars: pre-main sequence

UR - http://www.scopus.com/inward/record.url?scp=84994291457&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84994291457&partnerID=8YFLogxK

U2 - 10.3847/2041-8205/831/1/L7

DO - 10.3847/2041-8205/831/1/L7

M3 - Article

AN - SCOPUS:84994291457

SN - 2041-8205

VL - 831

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L7

ER -

A RESOLVED NEAR-INFRARED IMAGE of the INNER CAVITY in the GM Aur TRANSITIONAL DISK

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Keywords

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