School of Physics and Astronomy

Astronomy Unit Seminar - The origin of small scale structures in protoplanetary discs

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26 October 2018

Time: 2:30 - 4:30pm
Speaker: Attila Juhasz
Venue: GO Jones Building, Room 610

Planets are known to form in protoplanetary discs around young stars. For this very reason these discs were the targets of a vast number of observational and theoretical studies. However, for long time observations of protoplanetary discs were not straightforward to understand in context of theoretical models of planet formation, due to the spatial resolution and contrast limitations of even the largest telescopes. This has now changed thank to the unprecedented imaging capabilities of the latest generation sub-millimetre and near-infrared telescopes/instruments. In this talk I will give an overview of the astonishing variety of small scale structures (e.g. rings, gaps, spirals, warps) revealed by high resolution imaging observations in the past years. I will discuss the origin of these structures and their relationship with possible embedded planetary or stellar companions in the disc. I will also show how such observations could be used to not only infer the presence and location of embedded companions but also to measure the physical conditions in the disc.