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DTSTART:20170312T100000
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DTSTART;TZID=America/Los_Angeles:20171006T120000
DTEND;TZID=America/Los_Angeles:20171006T130000
DTSTAMP:20260527T194142
CREATED:20170908T175303Z
LAST-MODIFIED:20171002T160637Z
UID:263-1507291200-1507294800@inpa.lbl.gov
SUMMARY:Marie Lau (UC Santa Cruz) - Quasars Probing Quasars: the Circumgalactic Medium Surrounding z ~ 2 Quasars
DESCRIPTION:Understanding the circumgalactic medium–the gaseous halo surrounding a galaxy\, is an integral part to understanding galaxy evolution. The z ~ 2-3 universe is interesting as this is when the star formation rate and AGN activity peak. My work concludes the decade-long Quasars Probing Quasars survey designed for studying massive galaxy formation and quasar feedback. I use background quasar sightlines that pass close to foreground quasars to study the circumgalactic medium of quasar-host galaxies in absorption. My sample of 149 quasar pairs involve spectra taken with 17 different optical and near IR instruments. I present results on the statistical and physical properties of the quasar circumgalactic medium. My results pose challenges for cosmological hydrodynamic simulations to produce a substantial cool gas reservoir surrounding quasars\, that is also enriched and exhibits extreme kinematics.\n\n\nI will discuss other science goals that can be facilitated using the spectral databases and absorption-line analysis tools built. If there is interest\, I will show preliminary results on a peculiar tidal disruption event and evidence for deep internal mixing in red giants.
URL:https://inpa.lbl.gov/event/marie-lau-uc-santa-cruz/
LOCATION:50A-5132- Sessler\, 50A-5132 Sessler Conference Room\, CA
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