Farzana Meru - October 24, 2014

Planet-disc interactions and its effects on planet survivability, dust
evolution and further planet formation

Planets form out of the gas and dust rich protoplanetary discs that surround
the central star.  Once they form they will interact with their parent discs. In
this talk I will cover three aspects of planet-disc interactions.  Firstly I
will discuss the gap-opening criterion which is important for planet
survivability, preventing planets from being lost into their parent star. I will
discuss new results showing that a planet's ability to open up a gap and survive
in both young, self-gravitating discs as well as older T Tauri discs is harder
than previously thought.  Secondly I will talk about the dust evolution in a
young T Tauri disc after a single and multiple planets have formed, which can
potentially form long-lasting ring structures.  Finally, I will discuss the
evolution of young self-gravitating discs after a fragment has formed and in
particular its effect on the formation of further fragments at smaller radii
than typically expected.