Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk
文献类型：期刊论文
| 作者 | Liu, Hauyu Baobab14; Tsai, An-Li13; Chen, Wen Ping13; Liu, Jin Zhong12; Zhang, Xuan12 ; Ma, Shuo11,12; Elbakyan, Vardan9,10; Green, Joel D.7,8; Hales, Antonio S.5,6; Liu, Sheng-Yuan14
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2021-12-01 |
| 卷号 | 923期号:2页码:20 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac31b9 |
| 通讯作者 | Liu, Hauyu Baobab(hyliu@asiaa.sinica.edu.tw) |
| 英文摘要 | 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. |
| WOS关键词 | MOLECULAR CLOUDS ; PROTOPLANETARY DISCS ; PLANET FORMATION ; SPECTRAL INDEX ; SNOW-LINE ; ORIONIS ; ICE ; ALMA ; I. ; PROTOSTARS |
| 资助项目 | 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研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000735170900001 |
| 资助机构 | 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 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4425]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 光学天文与技术应用研究室_利用南山1米大视场望远镜（NOWT）观测数据的文章 |
| 通讯作者 | Liu, Hauyu Baobab |
| 作者单位 | 1.Univ Vienna, Dept Astrophys, A-1180 Vienna, Austria 2.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA 3.Univ Santiago Chile, Ctr Interdisciplinary Res Astrophys & Space Explo, Santiago, Chile 4.Univ Santiago Chile, Dept Fis, Ave Ecuador 3493, Santiago, Chile 5.Natl Radio Astron Observ, 520 Edgemt Rd, Charlottesville, VA 22903 USA 6.Joint ALMA Observ, Ave Alonso de Crdova 3107, Santiago 7630355, Chile 7.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 8.Space Telescope Sci Inst, Baltimore, MD 21218 USA 9.Southern Fed Univ, Res Inst Phys, Rostov Na Donu 344090, Russia 10.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England |
| 推荐引用方式 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):20. |
| 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),20. |
| 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):20. |
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来源：新疆天文台
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