Large-scale CO Spiral Arms and Complex Kinematics Associated with the T Tauri Star RU Lup
Author
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Huang, Jane
Author
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Andrews, Sean M.
Author
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Oberg, Karin I.
Author
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Ansdell, Megan
Author
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Benisty, Myriam
Author
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Carpenter, John M.
Author
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Isella, Andrea
Author
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Pérez Muñoz, Laura
Author
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Ricci, Luca
Author
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Williams, Jonathan P.
Author
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Wilner, David J.
Author
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Zhu, Zhaohuan
Admission date
dc.date.accessioned
2020-11-02T21:56:54Z
Available date
dc.date.available
2020-11-02T21:56:54Z
Publication date
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2020
Cita de ítem
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Astrophysical Journal Volumen: 898 Número: 2 Número de artículo: 140 (2020)
es_ES
Identifier
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10.3847/1538-4357/aba1e1
Identifier
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https://repositorio.uchile.cl/handle/2250/177526
Abstract
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While protoplanetary disks often appear to be compact and well organized in millimeter continuum emission, CO spectral line observations are increasingly revealing complex behavior at large distances from the host star. We present deep Atacama Large Millimeter/submillimeter Array maps of theJ = 2-1 transition of(12)CO,(CO)-C-13, and (CO)-O-18, as well as theJ = 3-2 transition of DCO+, toward the T Tauri star RU Lup at a resolution of similar to 0.3 '' (similar to 50 au). The CO isotopologue emission traces four major components of the RU Lup system: a compact Keplerian disk with a radius of similar to 120 au, a non-Keplerian "envelope-like" structure surrounding the disk and extending to similar to 260 au from the star, at least five blueshifted spiral arms stretching up to 1000 au, and clumps outside the spiral arms located up to 1500 au in projection from RU Lup. We comment on potential explanations for RU Lup's peculiar gas morphology, including gravitational instability, accretion of material onto the disk, or perturbation by another star. RU Lup's extended non-Keplerian CO emission, elevated stellar accretion rate, and unusual photometric variability suggest that it could be a scaled-down Class II analog of the outbursting FU Ori systems.
es_ES
Patrocinador
dc.description.sponsorship
National Science Foundation (NSF)
DGE-1144152
National Aeronautics & Space Administration (NASA)
17-XRP17_2-0012
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
Basal AFB-170002
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT
11181068