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| EPoS Contribution |
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The interplay of gas and dust dynamics during star and disc formation
Asmita Bhandare CRAL/ENS, Lyon, FR | |
| Dust grains constitute the main ingredients to form planets. Yet, present day numerical codes rarely account for the role of dust dynamics at disc formation stages, which can affect the initial conditions for planet formation. The advent of unprecedented surveys resolving substructures in young discs provide an incentive to better constraint the role of gas and dust interaction during the transition of molecular cloud cores to circumstellar discs. In this talk, I will highlight the results from self-consistent two-dimensional numerical simulations obtained using the PLUTO code. These include the effects of resistive magneto-hydrodynamics, self-gravity, radiative transport, and an accurate gas equation of state (to model the influence of molecular hydrogen dissociation), while treating the mutual drag forces between the fluid gas and dust particle components. Extending the first few studies that have analysed the importance of incorporating dust physics during collapse at scales larger than 1 au, this work focuses on sub-au regions in the protostellar vicinity. Preliminary results show a significant enhancement in the local dust-to-gas ratio beyond the standard one percent and dust concentration in high density regions at the nascent phases. These models will serve as the foundation for follow-up disc evolution studies that will also enable linking theoretical insights with observational signatures. | |
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| Caption: Density snapshots from a two-dimensional radiative magneto-hydrodynamic simulation zooming down to sub-au scales. The velocity streamlines in black indicate the infalling material. An outflow from the first core (white circle) is also visible in the panel labelled second collapse. Note the different spatial scales, from top left to bottom left, as the collapse proceeds through the stages of first and second core formation until the onset of disc formation. | |
| Collaborators: Kuiper R., ITA/ZAH, DE Flock M., MPIA, DE Commercon B., CRAL/ENS, FR Laibe G., CRAL/ENS, FR Henning Th., MPIA, DE |
Suggested Session:
Cores2Disks |