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NaCo polarimetric observations of Sz 91 transitional disc: a remarkable case of dust filtering

文献类型：期刊论文

作者Mauco, Karina1,2; Olofsson, Johan1,2; Canovas, Hector3; Schreiber, Matthias R.1,2; Christiaens, Valentin4; Bayo, Amelia1,2; Zurlo, Alice5; Caceres, Claudio1,6; Pinte, Christophe4; Villaver, Eva7
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2020-02-01
卷号492期号:2页码:1531-1542
ISSN号0035-8711
关键词techniques: polarimetric protoplanetary discs stars: individual: Sz 91 stars: variables: TTauri
DOI10.1093/mnras/stz3380
英文摘要We present polarized light observations of the transitional disc around Sz 91 acquired with VLT/NaCo at H (1.7 mu m) and K-s (2.2 mu m) bands. We resolve the disc and detect polarized emission up to similar to 0.5 arcsec (similar to 80 au) along with a central cavity at both bands. We computed a radiative transfer model that accounts for the main characteristics of the polarized observations. We found that the emission is best explained by small, porous grains distributed in a disc with a similar to 45 au cavity. Previous ALMA observations have revealed a large sub-mm cavity (similar to 83 au) and extended gas emission from the innermost (<16 au) regions up to almost 400 au from the star. Dynamical clearing by multiple low-mass planets arises as the most probable mechanism for the origin of Sz 91's peculiar structure. Using new L'(-)band ADI observations, we can rule out companions more massive than M-p >= 8 M-Jup beyond 45 au assuming hot-start models. The disc is clearly asymmetric in polarized light along the minor axis, with the north side brighter than the south side. Differences in position angle between the disc observed at sub-mm wavelengths with ALMA and our NaCo observations were found. This suggests that the disc around Sz 91 could be highly structured. Higher signal-to-noise near-IR and sub-mm observations are needed to confirm the existence of such structures and to improve the current understanding of the origin of transitional discs.
WOS关键词RADIATIVE-TRANSFER ; OPTICAL-PROPERTIES ; SCATTERING ; SIZE ; GAP
资助项目CONICYT-FONDECYT[3190859] ; ICM (Iniciativa Cientifica Milenio) via the Nucleo Milenio de Formacion Planetaria grant ; Universidad de Valparaiso ; Fondecyt[1180395] ; project CONICYT PAI/Concurso Nacional Insercion en la Academia[79150049] ; Chinese Academy of Sciences (CAS) through a CAS-CONICYT Postdoctoral Fellowship ; FONDECYT-CONICYT[1171246] ; Spanish MINECO[AyA2017-84089] ; National Aeronautics and Space Administration ; National Science Foundation ; ESO Telescopes at the Paranal Observatory[098.C-0420] ; ESO Telescopes at the Paranal Observatory[099.C-0336]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000512297600001
资助机构CONICYT-FONDECYT ; ICM (Iniciativa Cientifica Milenio) via the Nucleo Milenio de Formacion Planetaria grant ; Universidad de Valparaiso ; Fondecyt ; project CONICYT PAI/Concurso Nacional Insercion en la Academia ; Chinese Academy of Sciences (CAS) through a CAS-CONICYT Postdoctoral Fellowship ; FONDECYT-CONICYT ; Spanish MINECO ; National Aeronautics and Space Administration ; National Science Foundation ; ESO Telescopes at the Paranal Observatory ; CONICYT-FONDECYT ; ICM (Iniciativa Cientifica Milenio) via the Nucleo Milenio de Formacion Planetaria grant ; Universidad de Valparaiso ; Fondecyt ; project CONICYT PAI/Concurso Nacional Insercion en la Academia ; Chinese Academy of Sciences (CAS) through a CAS-CONICYT Postdoctoral Fellowship ; FONDECYT-CONICYT ; Spanish MINECO ; National Aeronautics and Space Administration ; National Science Foundation ; ESO Telescopes at the Paranal Observatory ; CONICYT-FONDECYT ; ICM (Iniciativa Cientifica Milenio) via the Nucleo Milenio de Formacion Planetaria grant ; Universidad de Valparaiso ; Fondecyt ; project CONICYT PAI/Concurso Nacional Insercion en la Academia ; Chinese Academy of Sciences (CAS) through a CAS-CONICYT Postdoctoral Fellowship ; FONDECYT-CONICYT ; Spanish MINECO ; National Aeronautics and Space Administration ; National Science Foundation ; ESO Telescopes at the Paranal Observatory ; CONICYT-FONDECYT ; ICM (Iniciativa Cientifica Milenio) via the Nucleo Milenio de Formacion Planetaria grant ; Universidad de Valparaiso ; Fondecyt ; project CONICYT PAI/Concurso Nacional Insercion en la Academia ; Chinese Academy of Sciences (CAS) through a CAS-CONICYT Postdoctoral Fellowship ; FONDECYT-CONICYT ; Spanish MINECO ; National Aeronautics and Space Administration ; National Science Foundation ; ESO Telescopes at the Paranal Observatory
源URL[http://ir.bao.ac.cn/handle/114a11/54229]  
专题中国科学院国家天文台
通讯作者Mauco, Karina
作者单位1.Univ Valparaiso, Nucleo Milenio Formac Planetaria NPF, Av Gran Bretana 1111, Valparaiso, Chile
2.Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Av Gran Bretana 1111,5030 Casilla, Valparaiso, Chile
3.European Space Astron Ctr ESA ESAC, Operat Dept, Villanueva De La Canada, Madrid, Spain
4.Monash Univ, Sch Phys & Astron, Clayton, Vic 3168, Australia
5.Univ Diego Portales, Fac Ingn & Ciencias, Nucleo Astron, Av Ejercito 441, Santiago, Chile
6.Univ Andres Bello, Fac Ciencias Exactas, Dept Ciencias Fis, Av Fernandez Concha 700, Santiago, Chile
7.Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain
8.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
9.Chinese Acad Sci, Natl Astron Observ, Chinese Acad Sci South Amer Ctr Astron, Beijing 100012, Peoples R China
推荐引用方式
GB/T 7714		 Mauco, Karina,Olofsson, Johan,Canovas, Hector,et al. NaCo polarimetric observations of Sz 91 transitional disc: a remarkable case of dust filtering[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,492(2):1531-1542.
APA Mauco, Karina.,Olofsson, Johan.,Canovas, Hector.,Schreiber, Matthias R..,Christiaens, Valentin.,...&Montesinos, Matias.(2020).NaCo polarimetric observations of Sz 91 transitional disc: a remarkable case of dust filtering.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,492(2),1531-1542.
MLA Mauco, Karina,et al."NaCo polarimetric observations of Sz 91 transitional disc: a remarkable case of dust filtering".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 492.2(2020):1531-1542.

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