BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-8925
DTSTART:20241001T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260413T223456Z
LAST-MODIFIED:20240925T132512Z
LOCATION:  Join Zoom Meeting: https://berkeley.zoom.us/j/91230714547  
  Meeting ID: 912 3071 4547
SUMMARY:Magnetar Giant Flares: A New Site of R-Process Nucleosynthesis
 \, Network in Neutrinos\, Nuclear Astrophysics\, and Symmetries (N3AS)
  Seminar\, Brian Metzger \, Columbia University
DESCRIPTION:Although much progress has been made in recent years\, the
  astrophysical origin(s) of the rapid neutron capture (r-process) rema
 in elusive.  Thanks to observations of several kilonovae (one being as
 sociated with a gravitational wave source)\, neutron star mergers are 
 now confirmed sites of the r-process\; however\, other sources may con
 tribute\, particularly at low metallicity. I will discuss a new r-proc
 ess source that occurs from the ejection of neutron star crust materia
 l following a magnetar giant flare\, such as that which occurred from 
 SGR 1806-20 in December 2004. Radioactive decay of these ejecta gives 
 rise to an extremely brief (~minutes long) optical/UV transient akin t
 o a scaled-down kilonova\, which may be detectable with rapidly slewin
 g UV space satellites such as ULTRASAT.  Additional motivation for siz
 able baryonic ejection from magnetar giant flares comes from their obs
 erved radio afterglows and the known magneto-ionic environments of som
 e fast radio bursts (speculated to be powered by exceptionally active 
 magnetars).
URL:https://www.physics.wisc.edu/events/?id=8925
END:VEVENT
END:VCALENDAR