Public Lecture—The Dark Universe Through Einstein's Lens
Δημοσιεύτηκε στις 29 Ιουλ 2013
Lecture
Date: Tuesday, July 23rd. Debbie Bard, a staff scientist at SLAC and a
member of the Kavli Institute for Particle Astrophysics and Cosmology,
delivered the July 23 SLAC Public Lecture, "The Dark Universe Through
Einstein's Lens."
Bard's talk explains the phenomenon known as
gravitational lensing and how astrophysicists use it to explore the 95
percent of the universe that remains unseen: dark matter and dark
energy.
One of the most surprising predictions made by Einstein's
theory of relativity is that light doesn't travel through the universe
in a straight line. The gravitational field of massive objects will
deflect the path of light traveling past, giving some very dramatic
effects. We see multiple images of quasars, galaxies smeared into arcs
and circles and magnified images of the most distant objects in the
universe. This explains how gravitational lensing was first observed and
discusses how scientists use this phenomenon to study everything from
exoplanets to dark matter to the structure of the universe and the
mysterious dark energy.
Bard began her career at SLAC as a
particle physicist and has since graduated to studying galaxy clusters
-- moving from exploring the most minuscule bits of matter in the
universe to the largest structures known. Currently she's developing new
ways to mine data from the future Large Synoptic Survey Telescope
(LSST) for information. Discovering how to push gravitational lensing to
its limits is one promising focus of her research. Lecturer: Debbie
Bard, SLAC/Kavli
Date: Tuesday, July 23rd. Debbie Bard, a staff scientist at SLAC and a
member of the Kavli Institute for Particle Astrophysics and Cosmology,
delivered the July 23 SLAC Public Lecture, "The Dark Universe Through
Einstein's Lens."
Bard's talk explains the phenomenon known as
gravitational lensing and how astrophysicists use it to explore the 95
percent of the universe that remains unseen: dark matter and dark
energy.
One of the most surprising predictions made by Einstein's
theory of relativity is that light doesn't travel through the universe
in a straight line. The gravitational field of massive objects will
deflect the path of light traveling past, giving some very dramatic
effects. We see multiple images of quasars, galaxies smeared into arcs
and circles and magnified images of the most distant objects in the
universe. This explains how gravitational lensing was first observed and
discusses how scientists use this phenomenon to study everything from
exoplanets to dark matter to the structure of the universe and the
mysterious dark energy.
Bard began her career at SLAC as a
particle physicist and has since graduated to studying galaxy clusters
-- moving from exploring the most minuscule bits of matter in the
universe to the largest structures known. Currently she's developing new
ways to mine data from the future Large Synoptic Survey Telescope
(LSST) for information. Discovering how to push gravitational lensing to
its limits is one promising focus of her research. Lecturer: Debbie
Bard, SLAC/Kavli
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