Issue |
A&A
Volume 639, July 2020
|
|
---|---|---|
Article Number | L1 | |
Number of page(s) | 7 | |
Section | Letters to the Editor | |
DOI | https://doi.org/10.1051/0004-6361/202038356 | |
Published online | 02 July 2020 |
Letter to the Editor
Ongoing flyby in the young multiple system UX Tauri⋆
1
Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
e-mail: francois.menard@univ-grenoble-alpes.fr
2
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Santiago, Chile
3
Univ Lyon, Univ Claude Bernard Lyon1, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, 69230 Saint-Genis-Laval, France
4
Sterrenkundig Instituut Anton Pannekoek, Science Park 904, 1098 XH Amsterdam, The Netherlands
5
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
6
European Southern Observatory, Alonso de Córdova 3107, Casilla 19001 Vitacura, Santiago, Chile
7
School of Physics and Astronomy, Monash University, Clayton, Vic 3800, Australia
8
LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195 Meudon, France
9
CECI, Université de Toulouse, CNRS, CERFACS, Toulouse, France
10
INAF, Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
11
INAF, Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy
12
Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, Switzerland
13
Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
14
STAR Institute, Université de Liège, Allée du Six Août 19c, 4000 Liège, Belgium
15
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
16
Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093 Zurich, Switzerland
17
Aix Marseille Université, CNRS, CNES, LAM, Marseille, France
18
Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
19
Escuela de Ingeniería Industrial, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
20
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
21
DOTA, ONERA, Université Paris Saclay, 91123 Palaiseau, France
Received:
5
May
2020
Accepted:
1
June
2020
We present observations of the young multiple system UX Tauri to look for circumstellar disks and for signs of dynamical interactions. We obtained SPHERE/IRDIS deep differential polarization images in the J and H bands. We also used ALMA archival CO data. Large extended spirals are well detected in scattered light coming out of the disk of UX Tau A. The southern spiral forms a bridge between UX Tau A and C. These spirals, including the bridge connecting the two stars, all have a CO (3–2) counterpart seen by ALMA. The disk of UX Tau C is detected in scattered light. It is much smaller than the disk of UX Tau A and has a major axis along a different position angle, suggesting a misalignment. We performed PHANTOM SPH hydrodynamical models to interpret the data. The scattered light spirals, CO emission spirals and velocity patterns of the rotating disks, and the compactness of the disk of UX Tau C all point to a scenario in which UX Tau A has been perturbed very recently (∼1000 years) by the close passage of UX Tau C.
Key words: protoplanetary disks / circumstellar matter / stars: pre-main sequence / binaries: general
Movies associated to Fig. 3 are available at https://www.aanda.org
© F. Ménard et al. 2020
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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