Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud
文献类型：期刊论文
| 作者 | Long,Feng1,2; Herczeg,Gregory J.1; Harsono,Daniel3; Pinilla,Paola4,5; Tazzari,Marco6; Manara,Carlo F.7; Pascucci,Ilaria8,9; Cabrit,Sylvie10,11; Nisini,Brunella12; Johnstone,Doug13,14 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-08-30 |
| 卷号 | 882期号:1 |
| 关键词 | circumstellar matter planets and satellites: formation protoplanetary disks stars: pre-main sequence |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab2d2d |
| 英文摘要 | Abstract We present a high-resolution (～0.″12, ～16 au, mean sensitivity of 50 μJy beam?1 at 225 GHz) snapshot survey of 32 protoplanetary disks around young stars with spectral type earlier than M3 in the Taurus star-forming region using the Atacama Large Millimeter Array. This sample includes most mid-infrared excess members that were not previously imaged at high spatial resolution, excluding close binaries and objects with high extinction, thereby providing a more representative look at disk properties at 1–2 Myr. Our 1.3 mm continuum maps reveal 12 disks with prominent dust gaps and rings, 2 of which are around primary stars in wide binaries, and 20 disks with no resolved features at the observed resolution (hereafter smooth disks), 8 of which are around the primary star in wide binaries. The smooth disks were classified based on their lack of resolved substructures, but their most prominent property is that they are all compact with small effective emission radii (Reff,95%???50 au). In contrast, all disks with Reff,95% of at least 55 au in our sample show detectable substructures. Nevertheless, their inner emission cores (inside the resolved gaps) have similar peak brightness, power-law profiles, and transition radii to the compact smooth disks, so the primary difference between these two categories is the lack of outer substructures in the latter. These compact disks may lose their outer disk through fast radial drift without dust trapping, or they might be born with small sizes. The compact dust disks, as well as the inner disk cores of extended ring disks, that look smooth at the current resolution will likely show small-scale or low-contrast substructures at higher resolution. The correlation between disk size and disk luminosity correlation demonstrates that some of the compact disks are optically thick at millimeter wavelengths. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-882-1-AB2D2D |
| 出版者 | The American Astronomical Society |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27266]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China 2.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People’s Republic of China 3.Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands 4.Department of Astronomy/Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 5.Max-Planck-Institut für Astronomie, K?nigstuhl 17, D-69117, Heidelberg, Germany 6.Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK 7.European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany 8.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA 9.Earths in Other Solar Systems Team, NASA Nexus for Exoplanet System Science, USA 10.Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75014 Paris, France |
| 推荐引用方式 GB/T 7714 | Long,Feng,Herczeg,Gregory J.,Harsono,Daniel,et al. Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud[J]. The Astrophysical Journal,2019,882(1). |
| APA | Long,Feng.,Herczeg,Gregory J..,Harsono,Daniel.,Pinilla,Paola.,Tazzari,Marco.,...&Lopez-Valdivia,Ricardo.(2019).Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud.The Astrophysical Journal,882(1). |
| MLA | Long,Feng,et al."Compact Disks in a High-resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud".The Astrophysical Journal 882.1(2019). |
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来源：紫金山天文台
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