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SUMMARY:Surfing spiral waves in discs - Cristiano Longarini (IoA Cambridge
 )
DTSTART:20250731T113000Z
DTEND:20250731T123000Z
UID:TALK234991@talks.cam.ac.uk
CONTACT:Mika Kontiainen
DESCRIPTION:In this Dynamics Lunch discussion\, I will explore the onset a
 nd evolution of gravitational instability in gaseous discs—focusing prim
 arily on protostellar systems—and draw parallels with spiral galaxies.\n
 \nGravitational instability is thought to be the main driver of angular mo
 mentum transport in young protostellar discs\, and to play an important ro
 le in the process of planet formation. I will discuss the key triggers of 
 instability—rapid cooling and/or external mass loading—and introduce h
 ow techniques from galactic dynamics can be used to understand the morphol
 ogy and kinematics of spiral waves in protostellar environments.\n\nThis d
 iscussion aims to bridge to connect galactic and protostellar discs\, demo
 nstrating that “surfing” spiral density waves provides a unified frame
 work to understand structure and formation across different scales.
LOCATION:Institute of Astronomy 
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