Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk

doi:10.3847/1538-4357/ac31b9

	Millimeter-sized Dust Grains Surviving the Water-sublimating Temperature in the Inner 10 au of the FU Ori Disk
	Liu, Hauyu Baobab 1; Tsai, An-Li 2; Chen, Wen Ping 2; Liu, Jin Zhong 3; Zhang, Xuan 3; Ma, Shuo 3,4; Elbakyan, Vardan 5,6; Green, Joel D.7,8; Hales, Antonio S.9,10; Liu, Sheng-Yuan 1
刊名	ASTROPHYSICAL JOURNAL
	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.
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关键词	MOLECULAR CLOUDS ; PROTOPLANETARY DISCS ; PLANET FORMATION ; SPECTRAL INDEX ; SNOW-LINE ; ORIONIS ; ICE ; ALMA ; I. ; PROTOSTARS
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
内容类型	期刊论文
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
通讯作者	Liu, Hauyu Baobab
作者单位	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
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.