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SUMMARY:The role of cosmic rays in protoplanetary disks and young exoplane
 tary systems
DTSTART;VALUE=DATE-TIME:20200514T093500Z
DTEND;VALUE=DATE-TIME:20200514T095500Z
DTSTAMP;VALUE=DATE-TIME:20240704T115619Z
UID:indico-contribution-50@meetings.aip.de
DESCRIPTION:Speakers: Donna Rodgers-Lee (Trinity College Dublin)\nThe infl
 uence of magnetic fields in protoplanetary disk evolution depends sensitiv
 ely on the level of ionisation present. Protoplanetary disks are thought t
 o be only very weakly ionised which provides imperfect coupling to magneti
 c fields and influences disk dynamics. Understanding the sources of ionisa
 tion\, such as cosmic rays\, present in the disks underpins our overall un
 derstanding of how these systems evolve and form planets. \n\nHowever\, yo
 ung solar-type stars are very magnetically active and drive stronger stell
 ar winds that may shield protoplanetary disks from galactic cosmic rays\, 
 thus losing an important source of ionisation. At the same time\, the incr
 eased 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 mod
 el of cosmic ray transport in these systems and the chemical signatures th
 at we might expect from cosmic rays.\n\nhttps://meetings.aip.de/event/1/co
 ntributions/50/
LOCATION:Leibniz Institute for Astrophysics Potsdam (AIP) Lecture Hall
URL:https://meetings.aip.de/event/1/contributions/50/
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