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Significant Gas-to-Dust Ratio Asymmetry and Variation in the Disk of HD 142527 and the Indication of Gas Depletion
Takayuki Muto, Takashi Tsukagoshi, Munetake Momose +14
We investigate the dust and gas distribution in the disk around HD 142527 based on ALMA observations of dust continuum, 13CO(3-2), and C18O(3-2) emission. The disk shows strong azi…
Study of infrared excess from circumstellar disks in binaries with Spitzer/IRAC
Yusuke Itoh, Misato Fukagawa, Hiroshi Shibai +2
The presence of excess emission at 3.6--8.0 m was investigated in a sample of 27 binary systems located in two nearby star-forming regions, Taurus and Ophiuchus, by using Spitze…
Detailed structure of the outer disk around HD 169142 with polarized light in H-band
Munetake Momose, Ayaka Morita, Misato Fukagawa +59
Coronagraphic imagery of the circumstellar disk around HD 169142 in H-band polarized intensity (PI) with Subaru/HiCIAO is presented. The emission scattered by dust particles at the…
Millimeter-wave polarization of protoplanetary disks due to dust scattering
Akimasa Kataoka, Takayuki Muto, Munetake Momose +6
We present a new method to constrain the grain size in protoplanetary disks with polarization observations at millimeter wavelengths. If dust grains are grown to the size comparabl…
A Study of Mid-Infrared Sources that Dramatically Brightened
Hiroki Onozato, Yoshifusa Ita, Kenji Ono +5
We present results of near-infrared photometric and spectroscopic observations of mid-infrared (MIR) sources that dramatically brightened. Using IRAS, AKARI, and WISE point source…