Public Lecture | Galaxy Clusters and the Life and Death of the Universe
Δημοσιεύτηκε στις 6 Φεβ 2017
The
distribution of galaxies in the universe is patchy. Galaxies are bound
together in clusters made of stars, hot gas and invisible dark matter.
These galaxy clusters are part of a cosmic web of filaments, nodes and
empty voids that has been building up over 13 billion years. How do we
observe this structure, and how do we use gravitational lensing and
satellite X-ray observations to measure its mass? How do galaxy clusters
trace the past expansion of the universe and reveal our future? This
lecture highlights data from the Dark Energy Survey, today’s largest
cosmic survey, to answer these questions.
About the speaker:
SLAC
Research Scientist Eli Rykoff has been weighing the universe for over a
decade. He received his PhD from the University of Michigan in 2005,
where he built a worldwide network of automated telescopes for following
gamma-ray bursts, the most energetic explosions in the universe. After
graduating, he transitioned to studying galaxy clusters, which evolve
over billions of years rather than fractions of seconds, and did
postdoctoral research at the University of California, Santa Barbara and
Lawrence Berkeley National Laboratory. Rykoff moved to SLAC in 2012,
where he works on galaxy cluster finding and other studies for the Dark
Energy Survey and the upcoming Large Synoptic Survey Telescope. He also
develops educational astronomy apps for the iPhone and iPad, including
CosmoCalc, a full-featured cosmological calculator, and GravLens3, a
gravitational lens simulator.
distribution of galaxies in the universe is patchy. Galaxies are bound
together in clusters made of stars, hot gas and invisible dark matter.
These galaxy clusters are part of a cosmic web of filaments, nodes and
empty voids that has been building up over 13 billion years. How do we
observe this structure, and how do we use gravitational lensing and
satellite X-ray observations to measure its mass? How do galaxy clusters
trace the past expansion of the universe and reveal our future? This
lecture highlights data from the Dark Energy Survey, today’s largest
cosmic survey, to answer these questions.
About the speaker:
SLAC
Research Scientist Eli Rykoff has been weighing the universe for over a
decade. He received his PhD from the University of Michigan in 2005,
where he built a worldwide network of automated telescopes for following
gamma-ray bursts, the most energetic explosions in the universe. After
graduating, he transitioned to studying galaxy clusters, which evolve
over billions of years rather than fractions of seconds, and did
postdoctoral research at the University of California, Santa Barbara and
Lawrence Berkeley National Laboratory. Rykoff moved to SLAC in 2012,
where he works on galaxy cluster finding and other studies for the Dark
Energy Survey and the upcoming Large Synoptic Survey Telescope. He also
develops educational astronomy apps for the iPhone and iPad, including
CosmoCalc, a full-featured cosmological calculator, and GravLens3, a
gravitational lens simulator.
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