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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-9817
DTSTART:20261022T203000Z
DTEND:20261022T213000Z
DTSTAMP:20261015T133758Z
LAST-MODIFIED:20260925T142821Z
LOCATION:4421 Sterling Hall
SUMMARY:Probing Cosmic Plasmas from Sub-AU to Gigaparsec Scales\, Astr
 onomy Colloquium\, Stella Ocker\, Brinson Prize Postdoctoral Fellow\, 
 California Institute of Technology
DESCRIPTION:Most of the ordinary matter in the universe takes the form
  of diffuse ionized gas\, or plasma. Characterizing the full distribut
 ion of this plasma is critical to understanding how the universe forms
  its main structures. In this talk\, I will discuss recent breakthroug
 hs in our efforts to resolve the distribution of cosmic plasmas across
  a vast range of spatial scales\, primarily based on observations of p
 ulsars and fast radio bursts (FRBs). These observations are distinct i
 n that they trace plasma densities on galactic and intergalactic scale
 s\, as well as sub-au plasma fluctuations. I will present the NE2025 G
 alactic electron density model\, and demonstrate how an up-to-date und
 erstanding of the Milky Way’s turbulent ionized gas distribution wil
 l reveal extremely diffuse plasmas around and between galaxies\, as we
 ll as enabling a sharp-eyed view of FRBs’ local environments. Implic
 ations for key surveys of the late 2020's\, including the Schmidt Obse
 rvatory System's Deep Synoptic Array\, will be discussed
URL:https://www.physics.wisc.edu/events/?id=9817
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