SDM: Unstable Protostellar Discs & Planet Formation | Non-Fellow Ticket

The Royal Astronomical Society (RAS), founded in 1820, encourages and promotes the study of astronomy, solar-system science, geophysics and closely related branches of science.

Royal Astronomical Society

This is part of our Specialist Discussion Meeting Programme. Hybrid Event. This ticket is for Non-Fellows only.

The Geological Society

<h3>Specialist Discussion Meeting:</h3> Gravitationally Unstable Protostellar Discs and Their Role in Planet FormationMany exoplanets have been discovered indirectly over the last 3 decades but now we are in an exciting era where telescopes, like SPHERE on the VLT, have enabled even direct observations. In parallel, facilities such as ALMA are routinely observing planet-forming discs in high spatial and spectral resolution, allowing us to witness planet formation in action. Recently, observations have shown that a subset of protostellar discs may be massive enough to be gravitationally unstable, such as Elias 2-24, AB Aur, L1448 IRS3B. Observations are also starting to probe Class 0 discs such as Oph A SM1, which are the very youngest discs and are also likely to be gravitationally unstable. Such discs are important to understand because they set the initial conditions for planet formation. Recent studies have started to investigate the importance of dust growth in gravitationally unstable discs, providing a potential planet formation pathway via the core accretion mechanism. The early phase of disc evolution may therefore play a key role in planet formation. The aim of this meeting is to bring together theorists and observers to address key questions about the role of gravitationally unstable discs in planet formation: <ul><li>What factors affect the formation and evolution of gravitationally unstable discs?</li><li>What are the observational signatures of gravitational instability, and do we observe these in Class 0 discs?</li><li>What fraction of protostellar discs are gravitationally unstable? How does the occurrence and outcome of gravitational instability vary with stellar mass, metallicity, or environment (e.g. clustered vs isolated stars)?</li><li>How do magnetic fields and non-ideal <a href="https://ras.ac.uk/taxonomy/term/1639" title="https://ras.ac.uk/taxonomy/term/1639" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">MHD</a> effects influence the onset and evolution of gravitational instability in discs?</li><li>What are the implications for dust transport, early grain growth, and the temperature structure of these discs, and how might these factors affect the core accretion model?</li><li>Is planet formation of wide-orbit planets possible by gravitational instability and how can this be tested through current and upcoming observations (e.g. from ALMA, JWST, ngVLA)?</li><li>How well do current numerical simulations reproduce observed disc structures, and what are the key challenges in bridging theory and observations?</li></ul> Invited SpeakersProf. Ken Rice, University of Edinburgh (Review Talk: The Theory of GI Discs)Dr. Teresa Paneque Carreno, University of Michigan (Review talk: Observations of GI Discs)Dr Cristiano Longarini, University of Cambridge (The interplay between infall and gravitational instability)Dr Sahl Rowther, University of Leicester/Warwick (The Impact of Stars and the Star-Forming Environment) Programme<a href="https://docs.google.com/spreadsheets/d/1uMDUwrAP5EyV-1kE96-5cfBPrZ-bfIe26Xk89HwD6kc/edit?usp=sharing" title="https://docs.google.com/spreadsheets/d/1uMDUwrAP5EyV-1kE96-5cfBPrZ-bfIe26Xk89HwD6kc/edit?usp=sharing" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">https://docs.google.com/spreadsheets/d/1uMDUwrAP5EyV-1kE96-5cfBPrZ-bfIe26Xk89HwD6kc/edit?usp=sharing</a>10:00 - 10:30 Coffee10:30 - 13:00 Morning Session13:00 - 14:00 Lunch14:00 - 15:30 Afternoon Session15:30 - 16:00 Tea Abstracts<a href="https://docs.google.com/spreadsheets/d/11QDfSwJa5f1-FiXeiNx3t8Dcb3OA4ncqzhWH2_Wim34/edit?usp=sharing" title="https://docs.google.com/spreadsheets/d/11QDfSwJa5f1-FiXeiNx3t8Dcb3OA4ncqzhWH2_Wim34/edit?usp=sharing" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">https://docs.google.com/spreadsheets/d/11QDfSwJa5f1-FiXeiNx3t8Dcb3OA4ncqzhWH2_Wim34/edit?usp=sharing</a> OrganisersDimitris Stamatellos (University of Lancashire, dstamatellos@lancashire.ac.uk)Farzana Meru (University of Warwick, F.Meru@warwick.ac.uk)Alison Young (University of Leeds, a.k.young@leeds.ac.uk)

Photo Credit: A.Mercer &amp; D. Stamatellos

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SDM: Unstable Protostellar Discs & Planet Formation | Non-Fellow Ticket

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SDM: Unstable Protostellar Discs & Planet Formation | Non-Fellow Ticket

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