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UID:UW-Physics-Event-6410
DTSTART:20210402T170000Z
DTEND:20210402T183000Z
DTSTAMP:20240329T125842Z
LAST-MODIFIED:20210330T133955Z
LOCATION:Zoom Meeting See Abstract for Link
SUMMARY:Making Use of Imaged Spotted Stellar Surfaces\, Astronomy Spec
ial Friday Lunch Talk\, Rachael Roettenbacher\, Yale University
DESCRIPTION:For stars with convective outer layers\, stellar magnetism
manifests as dark starspots--localized regions of stifled convection.
Starspots affect measurements of fundamental stellar parameters\, inc
luding temperature and radius\, which lead to inaccurate estimates of
age and mass. Additionally\, starspots have been shown to mimic and o
bscure detections of planets. By imaging stellar surfaces\, we begin
to disentangle the signatures of stellar magnetism. The imaging effor
ts discussed here feature aperture synthesis imaging using interferome
tric data with sub-milliarcsecond resolution. Using this technique an
d others\, I obtain images of active systems and detect magnetic struc
tures. Here\, I will discuss my work to study individual stars and s
urvey spotted stars in order to understand how stellar magnetism chang
es across the Hertzsprung-Russell diagram and impacts the evidence and
characterization of companions.
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\nZoom Link:
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https://uwmadison.zoom.us/j/88513896776?pwd=Y1JtRE1KZllxWkFTamJBSGtGdm
9yQT09
URL:https://www.physics.wisc.edu/events/?id=6410
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