BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:1 UID:UW-Physics-Event-4774 DTSTART:20180302T213000Z DURATION:PT1H0M0S DTSTAMP:20260317T063831Z LAST-MODIFIED:20180228T174153Z LOCATION:2241 Chamberlin Hall SUMMARY:Exploring the dark universe with cosmic surveys\, Physics Depa rtment Colloquium\, Keith Bechtol\, Large Synoptic Survey Telescope DESCRIPTION:Over the past few decades\, a “standard” but puzzling cosmological model has emerged that has passed increasingly stringent observational tests\, and yet raises many new questions. What is causi ng the accelerated expansion of the Universe? What are the particle co nstituents of dark matter? Can we measure the influence of massive neu trinos on the growth of cosmic structure? The Dark Energy Survey (DES) is one of several ongoing experiments producing ever larger and more detailed maps of the night sky to address these questions via statisti cal inference from measurements of hundreds of millions of individual stars and galaxies. I will highlight several recent results from DES\, including cosmology constraints from gravitational weak lensing\, gal axy clustering\, and supernovae\, newfound dwarf galaxies and stellar streams\, and the first optical detection of a kilonova explosion asso ciated with a gravitational wave signal. I will conclude with a discus sion of the next major experiment in this field\, the Large Synoptic S urvey Telescope (LSST)\, now under construction in Chile\, with first light expected in 2020.
\n URL:https://www.physics.wisc.edu/events/?id=4774 END:VEVENT END:VCALENDAR