Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Dynamical Evidence of a Spiral-Arm-Driving and Gap-Opening Protoplanet from SAO 206462 Spiral Motion
In the early stages of planetary system formation, young exoplanets gravitationally interact with their surrounding environments and leave observable signatures on protoplanetary disks. Among these structures, a pair of nearly symmetric spiral arms can be driven by a giant protoplanet. For the double-spiraled SAO 206462 protoplanetary disk, we obtained three epochs of observations spanning 7 yr using the Very Large Telescope’s SPHERE instrument in near-infrared J-band polarized light. By jointly measuring the motion of the two spirals at three epochs, we obtained a rotation rate of −0.°85±0.°05yr−1. This rate corresponds to a protoplanet at 66±3 au on a circular orbit dynamically driving both spirals. The derived location agrees with the gap in ALMA dust-continuum observations, indicating that the spiral driver may also carve the observed gap. What is more, a dust filament at ∼63 au observed by ALMA coincides with the predicted orbit of the spiral-arm-driving protoplanet. This double-spiraled system is an ideal target for protoplanet imaging.
Authors
- Simón Casassus (ORCID: https://orcid.org/0000-0002-0433-9840)
- F. Ménard (ORCID: https://orcid.org/0000-0002-1637-7393)
- Stefano Facchini (ORCID: https://orcid.org/0000-0003-4689-2684)
- R. G. van Holstein (ORCID: https://orcid.org/0000-0003-1520-8405)
- C. Ginski (ORCID: https://orcid.org/0000-0002-4438-1971)
- Bin Ren (ORCID: https://orcid.org/0000-0003-1698-9696)
- Chengyan Xie (ORCID: https://orcid.org/0000-0001-8184-5547)
- Chen Xie
- Taotao Fang (ORCID: https://orcid.org/0000-0002-2853-3808)
- Jaehan Bae (ORCID: https://orcid.org/0000-0001-7258-770X)
- M. Benisty (ORCID: https://orcid.org/0000-0002-7695-7605)
Institutions
- Centre National de la Recherche Scientifique (FR)
- University of Arizona (US)
- Johns Hopkins University (US)
- Ollscoil na Gaillimhe – University of Galway (IE)
- University of Milan (IT)
- Xiamen University (CN)
- Université Côte d'Azur (FR)
- University of Florida (US)
- Max Planck Institute for Astronomy (DE)
- Institut de Planétologie et d'Astrophysique de Grenoble (FR)
- Observatoire de la Côte d’Azur (FR)
- European Southern Observatory (CL)
- University of Chile (CL)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Universe
- Published
- 2024-12-20
- DOI
- https://doi.org/10.3390/universe10120465
- Citations
- 3
- Primary Topic
- Astrophysics and Star Formation Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.99
Funders
- National Science Foundation
- National Radio Astronomy Observatory
- European Space Agency
- European Commission
- National Natural Science Foundation of China
- Korea Astronomy and Space Science Institute
- National Astronomical Observatory of Japan
- Xiamen University
- National Science and Technology Council
- Horizon 2020 Framework Programme
- HORIZON EUROPE Framework Programme
- National Institutes of Natural Sciences
- National Key Research and Development Program of China