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| Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk | |
Liu, Hauyu Baobab1; Tsai, An-Li2; Chen, Wen Ping2; Liu, Jin Zhong3; Zhang, Xuan3 ; Ma, Shuo3,4; Elbakyan, Vardan5,6; Green, Joel D.7,8; Hales, Antonio S.9,10; Liu, Sheng-Yuan1; Takami, Michihiro1; Perez, Sebastian11,12; Vorobyov, Eduard, I6,13; Yang, Yao-Lun14
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| 2021-12-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 923Issue:2Pages:270 |
| Contribution Rank | 3 |
| Abstract | Previous observations have shown that the less than or similar to 10 au, greater than or similar to 400 K hot inner disk of the archetypal accretion outburst young stellar object, FU Ori, is dominated by viscous heating. To constrain dust properties in this region, we have performed radio observations toward this disk using the Karl G. Jansky Very Large Array in 2020 June-July, September, and November. We also performed complementary optical photometric monitoring observations. We found that the dust thermal emission from the hot inner disk mid-plane of FU Ori has been approximately stationary and the maximum dust grain size is greater than or similar to 1.6 mm in this region. If the hot inner disk of FU Ori, which is inward of the 150-170 K water snowline, is turbulent (e.g., corresponding to a Sunyaev & Shakura viscous alpha ( t ) greater than or similar to 0.1), or if the actual maximum grain size is still larger than the lower limit we presently constrain, then as suggested by the recent analytical calculations and the laboratory measurements, water-ice-free dust grains may be stickier than water-ice-coated dust grains in protoplanetary disks. Additionally, we find that the free-free emission and the Johnson B- and V-band magnitudes of these binary stars were brightening in 2016-2020. The optical and radio variability might be related to the dynamically evolving protostellar- or disk-accretion activities. Our results highlight that the hot inner disks of outbursting objects are important laboratories for testing models of dust grain growth. Given the active nature of such systems, to robustly diagnose the maximum dust grain sizes, it is important to carry out coordinated multiwavelength radio observations. |
| DOI | 10.3847/1538-4357/ac31b9 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MOLECULAR CLOUDS ; PROTOPLANETARY DISCS ; PLANET FORMATION ; SPECTRAL INDEX ; SNOW-LINE ; ORIONIS ; ICE ; ALMA ; I. ; PROTOSTARS |
| Funding Project | Smithsonian Institution ; Academia Sinica ; Ministry of Science and Technology (MoST) of Taiwan[108-2112-M-001-002-MY3] ; Ministry of Science and Technology (MoST) of Taiwan[110-2112-M-001069-] ; Ministry of Science and Technology (MoST) of Taiwan[106-2119-M-001026-MY3] ; Ministry of Science and Technology (MoST) of Taiwan[109-2112-M-001-019] ; Ministry of Science and Technology (MoST) of Taiwan[110-2112-M-001-044] ; Ministry of Science and Technology (MoST) of Taiwan[108-2923-M-001006-MY3] ; Russian Fund for Fundamental Research, Russian-Taiwanese project[19-52-52011] ; ANID/FONDECYT Regular[1191934] ; Virginia Initiative of Cosmic Origins Postdoctoral Fellowship |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000735170900001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | Smithsonian Institution ; Academia Sinica ; Ministry of Science and Technology (MoST) of Taiwan ; Russian Fund for Fundamental Research, Russian-Taiwanese project ; ANID/FONDECYT Regular ; Virginia Initiative of Cosmic Origins Postdoctoral Fellowship |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4426 |
| Collection | 光学天文与技术应用研究室 科研仪器设备产出_利用南山1米大视场望远镜（NOWT）观测数据的文章 |
| Corresponding Author | Liu, Hauyu Baobab |
| Affiliation | 1.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS-NTU 1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan 2.Natl Cent Univ, Inst Astron, 300 Zhongda Rd, Taoyuan 32001, Taiwan 3.Chinese Acad Sci, Xinjiang Astron Observ, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 5.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England 6.Southern Fed Univ, Res Inst Phys, Rostov Na Donu 344090, Russia 7.Space Telescope Sci Inst, Baltimore, MD 21218 USA 8.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 9.Joint ALMA Observ, Ave Alonso de Crdova 3107, Santiago 7630355, Chile 10.Natl Radio Astron Observ, 520 Edgemt Rd, Charlottesville, VA 22903 USA 11.Univ Santiago Chile, Dept Fis, Ave Ecuador 3493, Santiago, Chile 12.Univ Santiago Chile, Ctr Interdisciplinary Res Astrophys & Space Explo, Santiago, Chile 13.Univ Vienna, Dept Astrophys, A-1180 Vienna, Austria 14.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA |
| Recommended Citation GB/T 7714 | Liu, Hauyu Baobab,Tsai, An-Li,Chen, Wen Ping,et al. Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk[J]. ASTROPHYSICAL JOURNAL,2021,923(2):270. |
| APA | Liu, Hauyu Baobab.,Tsai, An-Li.,Chen, Wen Ping.,Liu, Jin Zhong.,Zhang, Xuan.,...&Yang, Yao-Lun.(2021).Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk.ASTROPHYSICAL JOURNAL,923(2),270. |
| MLA | Liu, Hauyu Baobab,et al."Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk".ASTROPHYSICAL JOURNAL 923.2(2021):270. |
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| Liu_2021_ApJ_923_270（2941KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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