Are the spiral arms in the MWC 758 protoplanetary disc driven by a companion inside the cavity?

被引：34
作者：
Calcino, Josh [1 ]
Christiaens, Valentin [2 ]
Price, Daniel J. [2 ]
Pinte, Christophe [2 ]
Davis, Tamara M. [1 ]
van der Marel, Nienke [3 ]
Cuello, Nicolas [4 ]
机构：
[1] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
[2] Monash Univ, Sch Phys & Astron, Melbourne, Vic 3800, Australia
[3] Univ Victoria, Dept Phys & Astron, 3800 Finnerty Rd, Victoria, BC V8P 5C2, Canada
[4] Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 498卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
hydrodynamics; planet-disc interactions; protoplanetary discs; circumstellar matter; DENSITY WAVES; RADIATIVE-TRANSFER; DUST; ECCENTRICITY; EVOLUTION; SCATTERING; LINDBLAD; PLANETS; GROWTH;
D O I：
10.1093/mnras/staa2468
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Spiral arms in protoplanetary discs are thought to be linked to the presence of companions. We test the hypothesis that the double spiral arm morphology observed in the transition disc MWC 758 can be generated by an approximate to 10 M-Jup companion on an eccentric orbit internal to the spiral arms. Previous studies on MWC 758 have assumed an external companion. We compare simulated observations from three-dimensional hydrodynamics simulations of disc-companion interaction to scattered light, infrared and CO molecular line observations, taking into account observational biases. The inner companion hypothesis is found to explain the double spiral arms, as well as several additional features seen in MWC 758 - the arc in the north-west, substructures inside the spiral arms, the cavity in CO isotopologues, and the twist in the kinematics. Testable predictions include detection of fainter spiral structure, detection of a point source south-southeast of the primary, and proper motion of the spiral arms.
引用
收藏
页码：639 / 650
页数：12
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