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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-2317
DTSTART:20111025T203000Z
DTEND:20111025T220000Z
DTSTAMP:20240319T112304Z
LAST-MODIFIED:20111019T133435Z
LOCATION:4421
SUMMARY:"The Restless Universe (Palomar Transient Factory)\, Whitford
Lecture\, Shrinivas Kulkarni\, CALTECH
DESCRIPTION:Cosmic explosions were first noted nearly two thousand yea
rs ago.However\, secure recognition and study began only a hundred yea
rs ago. What was once termed as Stella Nova (new stars) are now divid
ed into two major families\, novae and supernovae (with real distinct
classes in each). Equally the variable stars have a rich phenomenology
. Together\, supernovae and variable stars have contributed richly to
key problems in modern astrophysics: distances to galaxies\, cosmograp
hy and build up of elements in the Universe.
\n
\n The
Palomar Transient Factory (PTF)\, an innovative 2-telescope system\,
was designed to explicitly to chart the transient sky with a particul
ar focus on events which lie in the nova-supernova gap. PTF is now fin
ding an extragalactic transient every 20 minutes and a Galactic (stron
g) variable every 10 minutes. Extensive spectroscopy and photometry a
llowed us: to identify an emerging class of ultra-luminous supernovae
\, discover luminous red novae\, undertake UV spectroscopy of Ia super
novae\, discover low budget supernovae\, clarify sub-classes of core c
ollapse and thermo-nuclear explosions\, map the systematics of core co
llapse supernovae\, identify a trove of eclipsing binaries and the cur
ious AM CVns.
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\n
URL:https://www.physics.wisc.edu/events/?id=2317
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