High-resolution near-infrared polarimetry of a circumstellar disk around UXTauA

Ryoko Tanii, Yoichi Itoh, Tomoyuki Kudo, Tomonori Hioki, Yumiko Oasa, Ranjan Gupta, Asoke K. Sen, John P. Wisniewski, Takayuki Muto, Carol A. Grady, Jun Hashimoto, Misato Fukagawa, Satoshi Mayama, Jeremy Hornbeck, Michael L. Sitko, Ray W. Russell, Chelsea Werren, Michel Cure, Thayne Currie, Nagayoshi OhashiYoshiko Okamoto, Munetake Momose, Mitsuhiko Honda, Shu Ichi Inutsuka, Taku Takeuchi, Ruobing Dong, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Joseph Carson, Sebastian E. Egner, Markus Feldt, Tsubasa Fukue, Miwa Goto, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Markus Janson, Ryo Kandori, Gillian R. Knapp, Nobuhiko Kusakabe, Masayuki Kuzuhara, Taro Matsuo, Michael W. Mcelwain, Shoken Miyama, Jun Ichi Morino, Amaya Moro-Martin, Tetsuro Nishimura, Tae Soo Pyo, Eugene Serabyn, Hiroshi Suto, Ryuji Suzuki, Michihiro Takami, Naruhisa Takato, Hiroshi Terada, Christian Thalmann, Daigo Tomono, Edwin L. Turner, Makoto Watanabe, Toru Yamada, Hideki Takami, Tomonori Usuda, Motohide Tamura

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We present H-band polarimetric imagery of UXTauA taken with HiCIAO/AO188 on the Subaru Telescope. UXTauA has been classified as a pre-transitional disk object, with a gap structure separating its inner and outer disks. Our imagery taken with the 0. ''15 (21AU) radius coronagraphic mask has revealed a strongly polarized circumstellar disk surrounding UXTauA, which extends to 120AU, at a spatial resolution of 0. ''1 (14AU). It is inclined by 46 ± 2, since the west side is nearest. Although SED modeling and sub-millimeter imagery have suggested the presence of a gap in the disk, with the inner edge of the outer disk estimated to be located at 25-30AU, we detect no evidence of a gap at the limit of our inner working angle (23AU) at the near-infrared wavelength. We attribute the observed strong polarization (up to 66%) to light scattering by dust grains in the disk. However, neither polarization models of the circumstellar disk based on Rayleigh-scattering nor Mie-scattering approximations were consistent with the observed azimuthal profile of the polarization degrees of the disk. Instead, a geometric optics model of the disk with nonspherical grains with radii of 30μm is consistent with the observed profile. We suggest that the dust grains have experienced frequent collisional coagulations, and have grown in the circumstellar disk of UXTauA.

Original languageEnglish (US)
Article number124
JournalPublications of the Astronomical Society of Japan
Volume64
Issue number6
StatePublished - Dec 25 2012
Externally publishedYes

Fingerprint

polarimetry
near infrared
imagery
polarization
high resolution
scattering
dust
light scattering
coagulation
spatial resolution
wavelength
modeling
radii
Mie scattering
Rayleigh scattering
profiles
masks
telescopes
optics

Keywords

  • Stars: planetary systems: protoplanetary disk
  • Techniques: high angular resolution
  • Techniques: polarimetric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Tanii, R., Itoh, Y., Kudo, T., Hioki, T., Oasa, Y., Gupta, R., ... Tamura, M. (2012). High-resolution near-infrared polarimetry of a circumstellar disk around UXTauA. Publications of the Astronomical Society of Japan, 64(6), [124].

High-resolution near-infrared polarimetry of a circumstellar disk around UXTauA. / Tanii, Ryoko; Itoh, Yoichi; Kudo, Tomoyuki; Hioki, Tomonori; Oasa, Yumiko; Gupta, Ranjan; Sen, Asoke K.; Wisniewski, John P.; Muto, Takayuki; Grady, Carol A.; Hashimoto, Jun; Fukagawa, Misato; Mayama, Satoshi; Hornbeck, Jeremy; Sitko, Michael L.; Russell, Ray W.; Werren, Chelsea; Cure, Michel; Currie, Thayne; Ohashi, Nagayoshi; Okamoto, Yoshiko; Momose, Munetake; Honda, Mitsuhiko; Inutsuka, Shu Ichi; Takeuchi, Taku; Dong, Ruobing; Abe, Lyu; Brandner, Wolfgang; Brandt, Timothy D.; Carson, Joseph; Egner, Sebastian E.; Feldt, Markus; Fukue, Tsubasa; Goto, Miwa; Guyon, Olivier; Hayano, Yutaka; Hayashi, Masahiko; Hayashi, Saeko S.; Henning, Thomas; Hodapp, Klaus W.; Ishii, Miki; Iye, Masanori; Janson, Markus; Kandori, Ryo; Knapp, Gillian R.; Kusakabe, Nobuhiko; Kuzuhara, Masayuki; Matsuo, Taro; Mcelwain, Michael W.; Miyama, Shoken; Morino, Jun Ichi; Moro-Martin, Amaya; Nishimura, Tetsuro; Pyo, Tae Soo; Serabyn, Eugene; Suto, Hiroshi; Suzuki, Ryuji; Takami, Michihiro; Takato, Naruhisa; Terada, Hiroshi; Thalmann, Christian; Tomono, Daigo; Turner, Edwin L.; Watanabe, Makoto; Yamada, Toru; Takami, Hideki; Usuda, Tomonori; Tamura, Motohide.

In: Publications of the Astronomical Society of Japan, Vol. 64, No. 6, 124, 25.12.2012.

Research output: Contribution to journalArticle

Tanii, R, Itoh, Y, Kudo, T, Hioki, T, Oasa, Y, Gupta, R, Sen, AK, Wisniewski, JP, Muto, T, Grady, CA, Hashimoto, J, Fukagawa, M, Mayama, S, Hornbeck, J, Sitko, ML, Russell, RW, Werren, C, Cure, M, Currie, T, Ohashi, N, Okamoto, Y, Momose, M, Honda, M, Inutsuka, SI, Takeuchi, T, Dong, R, Abe, L, Brandner, W, Brandt, TD, Carson, J, Egner, SE, Feldt, M, Fukue, T, Goto, M, Guyon, O, Hayano, Y, Hayashi, M, Hayashi, SS, Henning, T, Hodapp, KW, Ishii, M, Iye, M, Janson, M, Kandori, R, Knapp, GR, Kusakabe, N, Kuzuhara, M, Matsuo, T, 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, Yamada, T, Takami, H, Usuda, T & Tamura, M 2012, 'High-resolution near-infrared polarimetry of a circumstellar disk around UXTauA', Publications of the Astronomical Society of Japan, vol. 64, no. 6, 124.
Tanii, Ryoko ; Itoh, Yoichi ; Kudo, Tomoyuki ; Hioki, Tomonori ; Oasa, Yumiko ; Gupta, Ranjan ; Sen, Asoke K. ; Wisniewski, John P. ; Muto, Takayuki ; Grady, Carol A. ; Hashimoto, Jun ; Fukagawa, Misato ; Mayama, Satoshi ; Hornbeck, Jeremy ; Sitko, Michael L. ; Russell, Ray W. ; Werren, Chelsea ; Cure, Michel ; Currie, Thayne ; Ohashi, Nagayoshi ; Okamoto, Yoshiko ; Momose, Munetake ; Honda, Mitsuhiko ; Inutsuka, Shu Ichi ; Takeuchi, Taku ; Dong, Ruobing ; Abe, Lyu ; Brandner, Wolfgang ; Brandt, Timothy D. ; Carson, Joseph ; Egner, Sebastian E. ; Feldt, Markus ; Fukue, Tsubasa ; Goto, Miwa ; Guyon, Olivier ; Hayano, Yutaka ; Hayashi, Masahiko ; Hayashi, Saeko S. ; Henning, Thomas ; Hodapp, Klaus W. ; Ishii, Miki ; Iye, Masanori ; Janson, Markus ; Kandori, Ryo ; Knapp, Gillian R. ; Kusakabe, Nobuhiko ; Kuzuhara, Masayuki ; Matsuo, Taro ; Mcelwain, Michael W. ; Miyama, Shoken ; Morino, Jun Ichi ; Moro-Martin, Amaya ; Nishimura, Tetsuro ; Pyo, Tae Soo ; Serabyn, Eugene ; Suto, Hiroshi ; Suzuki, Ryuji ; Takami, Michihiro ; Takato, Naruhisa ; Terada, Hiroshi ; Thalmann, Christian ; Tomono, Daigo ; Turner, Edwin L. ; Watanabe, Makoto ; Yamada, Toru ; Takami, Hideki ; Usuda, Tomonori ; Tamura, Motohide. / High-resolution near-infrared polarimetry of a circumstellar disk around UXTauA. In: Publications of the Astronomical Society of Japan. 2012 ; Vol. 64, No. 6.
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abstract = "We present H-band polarimetric imagery of UXTauA taken with HiCIAO/AO188 on the Subaru Telescope. UXTauA has been classified as a pre-transitional disk object, with a gap structure separating its inner and outer disks. Our imagery taken with the 0. ''15 (21AU) radius coronagraphic mask has revealed a strongly polarized circumstellar disk surrounding UXTauA, which extends to 120AU, at a spatial resolution of 0. ''1 (14AU). It is inclined by 46 ± 2, since the west side is nearest. Although SED modeling and sub-millimeter imagery have suggested the presence of a gap in the disk, with the inner edge of the outer disk estimated to be located at 25-30AU, we detect no evidence of a gap at the limit of our inner working angle (23AU) at the near-infrared wavelength. We attribute the observed strong polarization (up to 66{\%}) to light scattering by dust grains in the disk. However, neither polarization models of the circumstellar disk based on Rayleigh-scattering nor Mie-scattering approximations were consistent with the observed azimuthal profile of the polarization degrees of the disk. Instead, a geometric optics model of the disk with nonspherical grains with radii of 30μm is consistent with the observed profile. We suggest that the dust grains have experienced frequent collisional coagulations, and have grown in the circumstellar disk of UXTauA.",
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T1 - High-resolution near-infrared polarimetry of a circumstellar disk around UXTauA

AU - Tanii, Ryoko

AU - Itoh, Yoichi

AU - Kudo, Tomoyuki

AU - Hioki, Tomonori

AU - Oasa, Yumiko

AU - Gupta, Ranjan

AU - Sen, Asoke K.

AU - Wisniewski, John P.

AU - Muto, Takayuki

AU - Grady, Carol A.

AU - Hashimoto, Jun

AU - Fukagawa, Misato

AU - Mayama, Satoshi

AU - Hornbeck, Jeremy

AU - Sitko, Michael L.

AU - Russell, Ray W.

AU - Werren, Chelsea

AU - Cure, Michel

AU - Currie, Thayne

AU - Ohashi, Nagayoshi

AU - Okamoto, Yoshiko

AU - Momose, Munetake

AU - Honda, Mitsuhiko

AU - Inutsuka, Shu Ichi

AU - Takeuchi, Taku

AU - Dong, Ruobing

AU - Abe, Lyu

AU - Brandner, Wolfgang

AU - Brandt, Timothy D.

AU - Carson, Joseph

AU - Egner, Sebastian E.

AU - Feldt, Markus

AU - Fukue, Tsubasa

AU - Goto, Miwa

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 - Janson, Markus

AU - Kandori, Ryo

AU - Knapp, Gillian R.

AU - Kusakabe, Nobuhiko

AU - Kuzuhara, Masayuki

AU - Matsuo, Taro

AU - Mcelwain, Michael W.

AU - Miyama, Shoken

AU - Morino, Jun Ichi

AU - Moro-Martin, Amaya

AU - Nishimura, Tetsuro

AU - Pyo, Tae Soo

AU - Serabyn, Eugene

AU - Suto, Hiroshi

AU - Suzuki, Ryuji

AU - Takami, Michihiro

AU - Takato, Naruhisa

AU - Terada, Hiroshi

AU - Thalmann, Christian

AU - Tomono, Daigo

AU - Turner, Edwin L.

AU - Watanabe, Makoto

AU - Yamada, Toru

AU - Takami, Hideki

AU - Usuda, Tomonori

AU - Tamura, Motohide

PY - 2012/12/25

Y1 - 2012/12/25

N2 - We present H-band polarimetric imagery of UXTauA taken with HiCIAO/AO188 on the Subaru Telescope. UXTauA has been classified as a pre-transitional disk object, with a gap structure separating its inner and outer disks. Our imagery taken with the 0. ''15 (21AU) radius coronagraphic mask has revealed a strongly polarized circumstellar disk surrounding UXTauA, which extends to 120AU, at a spatial resolution of 0. ''1 (14AU). It is inclined by 46 ± 2, since the west side is nearest. Although SED modeling and sub-millimeter imagery have suggested the presence of a gap in the disk, with the inner edge of the outer disk estimated to be located at 25-30AU, we detect no evidence of a gap at the limit of our inner working angle (23AU) at the near-infrared wavelength. We attribute the observed strong polarization (up to 66%) to light scattering by dust grains in the disk. However, neither polarization models of the circumstellar disk based on Rayleigh-scattering nor Mie-scattering approximations were consistent with the observed azimuthal profile of the polarization degrees of the disk. Instead, a geometric optics model of the disk with nonspherical grains with radii of 30μm is consistent with the observed profile. We suggest that the dust grains have experienced frequent collisional coagulations, and have grown in the circumstellar disk of UXTauA.

AB - We present H-band polarimetric imagery of UXTauA taken with HiCIAO/AO188 on the Subaru Telescope. UXTauA has been classified as a pre-transitional disk object, with a gap structure separating its inner and outer disks. Our imagery taken with the 0. ''15 (21AU) radius coronagraphic mask has revealed a strongly polarized circumstellar disk surrounding UXTauA, which extends to 120AU, at a spatial resolution of 0. ''1 (14AU). It is inclined by 46 ± 2, since the west side is nearest. Although SED modeling and sub-millimeter imagery have suggested the presence of a gap in the disk, with the inner edge of the outer disk estimated to be located at 25-30AU, we detect no evidence of a gap at the limit of our inner working angle (23AU) at the near-infrared wavelength. We attribute the observed strong polarization (up to 66%) to light scattering by dust grains in the disk. However, neither polarization models of the circumstellar disk based on Rayleigh-scattering nor Mie-scattering approximations were consistent with the observed azimuthal profile of the polarization degrees of the disk. Instead, a geometric optics model of the disk with nonspherical grains with radii of 30μm is consistent with the observed profile. We suggest that the dust grains have experienced frequent collisional coagulations, and have grown in the circumstellar disk of UXTauA.

KW - Stars: planetary systems: protoplanetary disk

KW - Techniques: high angular resolution

KW - Techniques: polarimetric

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