Subaru/HiCIAO HK <SUB>s</SUB> Imaging of LKHa 330: Multi-band Detection of the Gap and Spiral-like Structures - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles The Astronomical Journal Year : 2018

Subaru/HiCIAO HK s Imaging of LKHa 330: Multi-band Detection of the Gap and Spiral-like Structures

Taichi Uyama
Jun Hashimoto
Takayuki Muto
  • Function : Author
Eiji Akiyama
Ruobing Dong
Jerome de Leon
  • Function : Author
Itsuki Sakon
Tomoyuki Kudo
Nobuhiko Kusakabe
  • Function : Author
Masayuki Kuzuhara
Lyu Abe
  • Function : Author
Wolfgang Brandner
  • Function : Author
Timothy D. Brandt
  • Function : Author
Joseph C. Carson
  • Function : Author
Thayne Currie
Sebastian Egner
  • Function : Author
Markus Feldt
  • Function : Author
Jeffrey Fung
  • Function : Author
Miwa Goto
  • Function : Author
Carol A. Grady
  • Function : Author
Olivier Guyon
Yutaka Hayano
Masahiko Hayashi
  • Function : Author
Saeko S. Hayashi
  • Function : Author
Thomas Henning
Klaus W. Hodapp
  • Function : Author
Miki Ishii
  • Function : Author
Masanori Iye
Markus Janson
Ryo Kandori
Gillian R. Knapp
  • Function : Author
Jungmi Kwon
Taro Matsuo
  • Function : Author
Satoshi Mayama
Michael W. Mcelwain
  • Function : Author
Shoken Miyama
Jun-Ichi Morino
  • Function : Author
Amaya Moro-Martin
Tetsuo Nishimura
  • Function : Author
Tae-Soo Pyo
Eugene Serabyn
  • Function : Author
Michael L. Sitko
  • Function : Author
Takuya Suenaga
  • Function : Author
Hiroshi Suto
  • Function : Author
Ryuji Suzuki
  • Function : Author
Yasuhiro H. Takahashi
  • Function : Author
Michihiro Takami
Naruhisa Takato
  • Function : Author
Hiroshi Terada
Christian Thalmann
Edwin L. Turner
  • Function : Author
Makoto Watanabe
John Wisniewski
Toru Yamada
  • Function : Author
Yi Yang
Hideki Takami
  • Function : Author
Tomonori Usuda
Motohide Tamura


We present H- and K s-bands observations of the LkHα 330 disk with a multi-band detection of the large gap and spiral-like structures. The morphology of the outer disk (r ∼ 0.″3) at PA = 0°-45° and PA° = 180-290° is likely density wave-induced spirals, and comparison between our observational results and simulations suggests a planet formation. We have also investigated the azimuthal profiles at the ring and the outer-disk regions as well as radial profiles in the directions of the spiral-like structures and semimajor axis. Azimuthal analysis shows a large variety in wavelength and implies that the disk has non-axisymmetric dust distributions. The radial profiles in the major-axis direction (PA = 271°) suggest that the outer region (r ≥ 0.″25) may be influenced by shadows of the inner region of the disk. The spiral-like directions (PA = 10° and 230°) show different radial profiles, which suggests that the surfaces of the spiral-like structures are highly flared and/or have different dust properties. Finally, a color map of the disk shows a lack of an outer eastern region in the H-band disk, which may hint at the presence of an inner object that casts a directional shadow onto the disk.

Dates and versions

insu-03693545 , version 1 (10-06-2022)



Taichi Uyama, Jun Hashimoto, Takayuki Muto, Eiji Akiyama, Ruobing Dong, et al.. Subaru/HiCIAO HK s Imaging of LKHa 330: Multi-band Detection of the Gap and Spiral-like Structures. The Astronomical Journal, 2018, 156, ⟨10.3847/1538-3881/aacbd1⟩. ⟨insu-03693545⟩
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