The Origin of the Doppler Flip in HD 100546: A Large-scale Spiral Arm Generated by an Inner Binary Companion

被引：13

作者：

Norfolk, Brodie J. ^{[1
]}

Pinte, Christophe ^{[2
,3
]}

Calcino, Josh ^{[4
]}

Hammond, Iain ^{[2
]}

van der Marel, Nienke ^{[5
]}

Price, Daniel J. ^{[2
]}

Maddison, Sarah T. ^{[1
]}

Christiaens, Valentin ^{[6
]}

Gonzalez, Jean-Francois ^{[7
]}

Blakely, Dori ^{[8
]}

Rosotti, Giovanni ^{[5
,9
]}

Ginski, Christian ^{[5
]}

机构：

[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp CAS, Hawthorn, Vic 3122, Australia

[2] Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia

[3] Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France

[4] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA

[5] Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[6] Univ Liege, Space Sci Technol & Astrophys Res STAR Inst, Allee Six Aout 19c, B-4000 Sart Tilman Par Liege, Belgium

[7] Univ Lyon, Univ Claude Bernard Lyon 1, ENS Lyon, CNRS,Ctr Rech Astrophys Lyon UMR5574, F-69230 St Genis Laval, France

[8] Univ Victoria, 3800 Finnerty Rd, Victoria, BC V8P 5C2, Canada

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

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2022年 / 936卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

RADIATIVE-TRANSFER; DISK; DUST; GAS; CAVITY; PROTOPLANET; PLANETS; SIZE;

D O I：

10.3847/2041-8213/ac85ed

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Companions at subarcsecond separation from young stars are difficult to image. However, their presence can be inferred from the perturbations they create in the dust and gas of protoplanetary disks. Here we present a new interpretation of SPHERE polarized observations that reveal the previously detected inner spiral in the disk of HD 100546. The spiral coincides with a newly detected (CO)-C-12 inner spiral and the previously reported CO emission Doppler flip, which has been interpreted as the signature of an embedded protoplanet. Comparisons with hydrodynamical models indicate that this Doppler flip is instead the kinematic counterpart of the spiral, which is likely generated by an inner companion inside the disk cavity.

引用

页数：12

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