Dynamical detection of a companion driving a spiral arm in a protoplanetary disk
| Autor: | Xie, Chen, Ren, Bin B., Dong, Ruobing, Choquet, Élodie, Vigan, Arthur, Gonzalez, Jean-François, Wagner, Kevin, Fang, Taotao, Ubeira-Gabellini, Maria Giulia |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | A&A 675, L1 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1051/0004-6361/202346305 |
| Popis: | Radio and near-infrared observations have observed dozens of protoplanetary disks that host spiral arm features. Numerical simulations have shown that companions may excite spiral density waves in protoplanetary disks via companion-disk interaction. However, the lack of direct observational evidence for spiral-driving companions poses challenges to current theories of companion-disk interaction. Here we report multi-epoch observations of the binary system HD 100453 with the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) facility at the Very Large Telescope. By recovering the spiral features via robustly removing starlight contamination, we measure spiral motion across 4 yr to perform dynamical motion analyses. The spiral pattern motion is consistent with the orbital motion of the eccentric companion. With this first observational evidence of a companion driving a spiral arm among protoplanetary disks, we directly and dynamically confirm the long-standing theory on the origin of spiral features in protoplanetary disks. With the pattern motion of companion-driven spirals being independent of companion mass, here we establish a feasible way of searching for hidden spiral-arm-driving planets that are beyond the detection of existing ground-based high-contrast imagers. Comment: Accepted for publication in Astronomy and Astrophysics; 12 pages, 9 figures |
| Databáze: | arXiv |
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