11-15 May 2020
Leibniz Institute for Astrophysics Potsdam (AIP)
Europe/Berlin timezone

The role of cosmic rays in protoplanetary disks and young exoplanetary systems

14 May 2020, 11:35
Lecture Hall (Leibniz Institute for Astrophysics Potsdam (AIP))

Lecture Hall

Leibniz Institute for Astrophysics Potsdam (AIP)

An der Sternwarte 16 14482 Potsdam, Germany
Oral presentation Main conference Disk Microphysics and Ionization


Donna Rodgers-Lee (Trinity College Dublin)


The influence of magnetic fields in protoplanetary disk evolution depends sensitively on the level of ionisation present. Protoplanetary disks are thought to be only very weakly ionised which provides imperfect coupling to magnetic fields and influences disk dynamics. Understanding the sources of ionisation, such as cosmic rays, present in the disks underpins our overall understanding of how these systems evolve and form planets.

However, young solar-type stars are very magnetically active and drive stronger stellar winds that may shield protoplanetary disks from galactic cosmic rays, thus losing an important source of ionisation. At the same time, the increased magnetic activity of young stars suggests that protoplanetary disks, and young exoplanetary systems, are bombarded by stellar cosmic rays, or stellar energetic particles. I will present recent results from our model of cosmic ray transport in these systems and the chemical signatures that we might expect from cosmic rays.

Primary author

Donna Rodgers-Lee (Trinity College Dublin)


Dr Andrew Taylor Prof. Aline Vidotto Dr Paul Rimmer Prof. Turlough Downes

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