Differences in the gas and dust distribution in the transitional disk of a sun-like young star, PDS 70

Zachary C. Long; Eiji Akiyama; Michael Sitko; Rachel B. Fernandes; Korash Assani; Carol A. Grady; Michel Cure; Ruobing Dong; Misato Fukagawa; Yasuhiro Hasegawa; Jun Hashimoto; Thomas Henning; Shu-Ichiro Inutsuka; Stefan Kraus; Jungmi Kwon; Carey M. Lisse; Hauyu Baobabu Liu; Satoshi Mayama; Takayuki Muto; Takao Nakagawa; Michihiro Takami; Motohide Tamura; Thayne Currie; John P. Wisniewski; Yi Yang

doi:10.3847/1538-4357/aaba7c

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arXiv · 1804.00529

Differences in the gas and dust distribution in the transitional disk of a sun-like young star, PDS 70

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Abstract

We present ALMA 0.87 mm continuum, HCO+ J=4--3 emission line, and CO J=3--2 emission line data of the disk of material around the young, Sun-like star PDS 70. These data reveal the existence of a possible two component transitional disk system with a radial dust gap of 0."2 +/- 0."05, an azimuthal gap in the HCO+ J=4--3 moment zero map, as well as two bridge-like features in the gas data. Interestingly these features in the gas disk have no analogue in the dust disk making them of particular interest. We modeled the dust disk using the Monte Carlo radiative transfer code HOCHUNK3D (Whitney et al. 2013) using a two disk components. We find that there is a radial gap that extends from 15-60 au in all grain sizes which differs from previous work.

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Zachary C. Long, Eiji Akiyama, Michael Sitko, Rachel B. Fernandes, Korash Assani, Carol A. Grady, Michel Cure, Ruobing Dong, Misato Fukagawa, Yasuhiro Hasegawa, Jun Hashimoto, Thomas Henning, Shu-Ichiro Inutsuka, Stefan Kraus, Jungmi Kwon, Carey M. Lisse, Hauyu Baobabu Liu, Satoshi Mayama, Takayuki Muto, Takao Nakagawa, Michihiro Takami, Motohide Tamura, Thayne Currie, John P. Wisniewski, Yi Yang. 2018-04-02. Differences in the gas and dust distribution in the transitional disk of a sun-like young star, PDS 70. https://doi.org/10.3847/1538-4357%2Faaba7c

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