| Name: Dhritimaan Gogoi |
| Affiliation: Gauhati University |
| Conference ID: ASI2026_422 |
| Title: Probing structure formation in a dusty protoplanetary disk. |
| Abstract Type: Oral |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: Dhritimaan Gogoi(Dept. of Applied Sciences, Gauhati University, Assam-781014, India), Ribanda Marbaniang(Dept. of Applied Sciences, Gauhati University, Assam-781014, India), Eeshankur Saikia(Dept. of Applied Sciences, Gauhati University, Assam-781014, India) |
| Abstract: Observations have revealed nearly 6,000 exoplanets orbiting stars, with the majority residing in systems hosting two or more planets. Previous numerical studies have primarily focused on the dynamical interaction between a single planet and a protoplanetary disk, successfully explaining observed disk substructures such as gaps and rings. In contrast, the present numerical work explores the role of multiple planets in facilitating the formation of such structures by accounting for their mutual dynamical interactions with the disk. Multiplanet systems are typically characterized by low orbital eccentricities and convergent migration, which can lead to mean-motion resonance locking. In addition to axisymmetric features, non-axisymmetric structures such as vortices can emerge and act as efficient dust traps, thereby promoting planetesimal formation. Our results demonstrate the formation of pronounced dust clumps within gas vortices, where dust accumulates irrespective of particle size, as parameterized by the Stokes number. The formation and long-term survival of these gas vortices are strongly dependent on the initial disk conditions and are found to persist over extended evolutionary timescales (~10,000 orbits). This work can provide insight into the physical processes operating in recent “directly imaged” multiplanet systems such as PDS 70. Future work will aim to incorporate the effects of magnetic winds and detailed thermal processes to achieve a more comprehensive and physically realistic description of such disks.
Keywords: Protoplanetary Disk– method: numerical – hydrodynamics– planet-disk interaction
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