BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Astrophysical discs: from Saturn's rings to black holes - Gordon O
 gilvie\, Department of Applied Maths and Theoretical Physics
DTSTART:20251028T190000Z
DTEND:20251028T200000Z
UID:TALK239989@talks.cam.ac.uk
CONTACT:Yunkai
DESCRIPTION:Consisting of continuous matter in orbital motion around a mas
 sive body\, astrophysical discs are one of the most ubiquitous of astronom
 ical objects. They include the discs of dusty gas in which planets form ar
 ound young stars\, accretion discs of hot plasma around black holes on bot
 h stellar and galactic scales\, and planetary rings of colliding debris su
 ch as Saturn's. Astrophysical discs are therefore relevant to understandin
 g both our own origins and some of the most extreme environments in the Un
 iverse. The last decade has seen intriguing images of discs from ALMA\, VL
 T and the Event Horizon Telescope\, as well as Cassini-Huygens.\n\nIn this
  talk I will explore some of the universal properties of astrophysical dis
 cs as well as some distinctive features of discs in various environments. 
 I will explain how their evolution is regulated by the transport or remova
 l of angular momentum and will highlight a surprising role for magnetic fi
 elds. I will discuss how the orbital geometry and the appearance of discs 
 is affected by a binary companion\, a planet orbiting within the disc\, or
  by relativity.
LOCATION:Tilley Lecture Theater\, Department of Earth Sciences
END:VEVENT
END:VCALENDAR