文章基本信息

标题：Subaru/HiCIAO HKs Imaging of LKHa 330: Multi-band Detection of the Gap and Spiral-like Structures
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作者：Taichi Uyama ; Jun Hashimoto ; Takayuki Muto 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2018
卷号：156
期号：2
页码：1-12
DOI：10.3847/1538-3881/aacbd1
语种：English
出版社：American Institute of Physics
摘要：We present H- and Ks-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 majoraxis 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.
关键词：planet–disk interactions;polarization;protoplanetary disks