BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-4647
DTSTART:20171204T180000Z
DTEND:20171204T190000Z
DTSTAMP:20260419T003608Z
LAST-MODIFIED:20171120T012513Z
LOCATION:Chamberlin 2241
SUMMARY:The Origin of Diffuse 6.4 keV line Emission from Galactic Cent
 er Molecular Clouds\, Plasma Physics (Physics/ECE/NE 922) Seminar\, Pr
 of. Farhad Yusef-Zadeh\, Northwestern University
DESCRIPTION:The central region of our Galaxy (the inner few hundred pa
 rsecs of the Galactic center) is different from the rest of the Galaxy
  in its interstellar medium properties.  This region is centered on a 
 supermassive\, 4 million-solar-mass black hole (Sgr A*) and is occupie
 d by a large concentration of a warm molecular gas with high density\,
  high velocity dispersion\, high gas temperature\, and high cosmic ray
  flux. Gas clouds in this region are subject to the strong tidal field
  that may suppress star formation in this region.  I will give an over
 view of our work on the Galactic center\, including the origin of the 
 6.4 keV line emission from molecular clouds\, discovered in recent yea
 rs\, as well as the evidence for star formation near Sgr A*.  In one m
 odel\, the 6.4 keV emission results from X-ray irradiation by a hypoth
 etical transient source associated with the massive black hole Sgr A*.
  Alternatively\, relativistic particles from local nonthermal sources 
 impact diffuse neutral gas producing bremsstrahlung emission and the 6
 .4 keV line emission.
URL:https://www.physics.wisc.edu/events/?id=4647
END:VEVENT
END:VCALENDAR