Dual-band Observations of the Asymmetric Ring around CIDA 9A: Dead or Alive?

被引：4

作者：

Harsono, Daniel ^{[1
]}

Long, Feng ^{[2
,3
]}

Pinilla, Paola ^{[4
]}

Rota, Alessia A. ^{[5
]}

Manara, Carlo F. ^{[6
]}

Herczeg, Gregory J. ^{[7
]}

Johnstone, Doug ^{[8
,9
]}

Rosotti, Giovanni ^{[5
,10
,11
]}

Lodato, Giuseppe ^{[11
]}

Menard, Francois ^{[12
]}

Tazzari, Marco ^{[13
]}

Shi, Yangfan ^{[14
]}

机构：

[1] Natl Tsing Hua Univ, Inst Astron, Dept Phys, Hsinchu 30013, Taiwan

[2] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[3] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[4] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England

[5] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[6] 1 European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[7] Peking Univ, Kavli Inst Astron & Astrophys, Yiheyuan 5, Beijing 100871, Peoples R China

[8] NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[9] Univ Victoria, Dept Phys & Astron, 3800 Finnerty Rd,Elliot Bldg, Victoria, BC V8P 5C2, Canada

[10] Univ Leicester, Sch Phys & Astron, Leicester LE1 7RH, England

[11] Univ Milan, Dipartimento Fis, Via Giovanni Celoria 16, I-20133 Milan, MI, Italy

[12] Univ Grenoble Alpes, CNRS, UMR 5274, IPAG, F-38000 Grenoble, France

[13] INAF Osservatorio Astrofisico Arcetri, Lgo E Fermi 5, I-50125 Florence, Italy

[14] Peking Univ, Dept Astron, Yiheyuan 5, Beijing 100871, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2024年 / 961卷 / 01期

基金：

欧洲研究理事会; 加拿大自然科学与工程研究理事会; 中国国家自然科学基金;

关键词：

LOW-MASS STARS; PRE-MAIN-SEQUENCE; TRANSITION DISKS; PROTOPLANETARY DISKS; MULTIWAVELENGTH ANALYSIS; DUST RINGS; ALMA; PLANET; GAP; I;

D O I：

10.3847/1538-4357/ad0835

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

While the most exciting explanation of the observed dust asymmetries in protoplanetary disks is the presence of protoplanets, other mechanisms can also form the dust features. This paper presents dual-wavelength Atacama Large Millimeter/submillimeter Array observations of a large asymmetric dusty ring around the M-type star CIDA 9A. We detect a dust asymmetry in both 1.3 and 3.1 mm data. To characterize the asymmetric structure, a parametric model is used to fit the observed visibilities. We report a tentative azimuthal shift of the dust emission peaks between the observations at the two wavelengths. This shift is consistent with a dust trap caused by a vortex, which may be formed by an embedded protoplanet or other hydrodynamical instabilities, such as a dead zone. Deep high-spatial-resolution observations of dust and molecular gas are needed to constrain the mechanisms that formed the observed millimeter cavity and dust asymmetry in the protoplanetary disk around CIDA 9A.

引用

页数：16

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