The properties of the inner disk around HL Tau: Multi-wavelength modeling of the dust emission

doi:10.1051/0004-6361/201629786

	The properties of the inner disk around HL Tau: Multi-wavelength modeling of the dust emission
	Liu, Yao1,2,3 ; Henning, Thomas 1; Carrasco-Gonzalez, Carlos 4; Chandler, Claire J.5; Linz, Hendrik 1; Birnstiel, Til 1; van Boekel, Roy 1; Perez, Laura M.6; Flock, Mario 7; Testi, Leonardo 8,9,10
刊名	ASTRONOMY & ASTROPHYSICS
	2017-11-16
卷号	607 页码:10
关键词	protoplanetary disks radiative transfer stars: formation stars: individual: HL Tau
ISSN号	1432-0746
DOI	10.1051/0004-6361/201629786
通讯作者	Liu, Yao(yliu@mpia.de)
英文摘要	We conducted a detailed radiative transfer modeling of the dust emission from the circumstellar disk around HL Tau. The goal of our study is to derive the surface density profile of the inner disk and its structure. In addition to the Atacama Large Millimeter/submillimeter Array images at Band 3 (2.9 mm), Band 6 (1.3 mm), and Band 7 (0.87 mm), the most recent Karl G. Jansky Very Large Array (VLA) observations at 7mm were included in the analysis. A simulated annealing algorithm was invoked to search for the optimum model. The radiative transfer analysis demonstrates that most radial components (i.e., > 6AU) of the disk become optically thin at a wavelength of 7 mm, which allows us to constrain, for the first time, the dust density distribution in the inner region of the disk. We found that a homogeneous grain size distribution is not sufficient to explain the observed images at different wavelengths simultaneously, while models with a shallower grain size distribution in the inner disk work well. We found clear evidence that larger grains are trapped in the first bright ring. Our results imply that dust evolution has already taken place in the disk at a relatively young (i.e., similar to 1 Myr) age. We compared the midplane temperature distribution, optical depth, and properties of various dust rings with those reported previously. Using the Toomre parameter, we briefly discussed the gravitational instability as a potential mechanism for the origin of the dust clump detected in the first bright ring via the VLA observations.
WOS关键词	SPECTRAL ENERGY-DISTRIBUTIONS ; SELF-CONSISTENT MODEL ; PLANET FORMATION ; ACCRETION DISKS ; CIRCUMSTELLAR DISKS ; PROTOPLANETARY DISK ; GRAIN EVOLUTION ; STARS ; OBJECTS ; REGION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000415762200005
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22580]
专题	中国科学院紫金山天文台
通讯作者	Liu, Yao
作者单位	1.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 2.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 4.Inst Radioastron & Astrofis UNAM, Apartado Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico 5.Natl Radio Astron Observ, POB O,1003 Lopezville Rd, Socorro, NM 87801 USA 6.Max Planck Inst Radioastron Bonn, Hugel 69, D-53121 Bonn, Germany 7.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA 8.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 9.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy 10.Excellence Cluster Universe, Boltzmann Str 2, D-85748 Garching, Germany
推荐引用方式 GB/T 7714	Liu, Yao,Henning, Thomas,Carrasco-Gonzalez, Carlos,et al. The properties of the inner disk around HL Tau: Multi-wavelength modeling of the dust emission[J]. ASTRONOMY & ASTROPHYSICS,2017,607:10.
APA	Liu, Yao.,Henning, Thomas.,Carrasco-Gonzalez, Carlos.,Chandler, Claire J..,Linz, Hendrik.,...&Galvan-Madrid, Roberto.(2017).The properties of the inner disk around HL Tau: Multi-wavelength modeling of the dust emission.ASTRONOMY & ASTROPHYSICS,607,10.
MLA	Liu, Yao,et al."The properties of the inner disk around HL Tau: Multi-wavelength modeling of the dust emission".ASTRONOMY & ASTROPHYSICS 607(2017):10.