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Revision as of 01:22, 22 January 2014
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|Recorded =
|Recorded =
|Host = Brian Keating
|Host = Brian Keating
-
|Title =
Title
:
TBA
+
|Title =
"Spatially Resolving Galaxies in the Early Universe
:
The Exciting Promise<br>of AO instrumentation"
-
|Abstract =
Abstract: TBA
+
|Abstract =
Recent advances in diffraction-limited techniques on 8-10m telescopes using adaptive optics (AO) and integral field spectrographs (IFS) have led to significant scientific achievements and are stimulating the design of future instrumentation. My talk will focus on development and use of current near-infrared AO instruments to study galaxies in the early universe, as well as the design and capabilities of AO instrumentation for the future Thirty Meter Telescope (TMT). I will present our team's work on the recent upgrade of OSIRIS at Keck Observatory, which has doubled the sensitivity of the IFS. With this gain in performance, I will present preliminary results of our spatially resolved observations of intermediate redshift (z~1) star forming galaxies. These results are part of an ongoing survey to study the dynamics, chemical abundances, and active galactic nuclei (AGN) in early galaxies. I will also present a powerful method that utilizes IFS and AO observations to reveal QSO host galaxies, which can provide important constraints on galaxy-black hole formation and evolution. Lastly, IRIS (InfraRed Imaging Spectrograph) is a near-infrared instrument being designed to sample the diffraction-limit of the Thirty Meter Telescope, which will yield revolutionary capabilities on a range of science cases. There are several instrumental and observational challenges that need to be overcome in order to exploit the diffraction-limit of a 30m telescope. I will discuss IRIS's instrument design, diverse science cases, and our current efforts in the laboratory to maximize the instrument's sensitivities.
}}
}}
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|Note =
|Note =
|Date = 2/12/14
|Date = 2/12/14
-
|Speaker = Naoko Kurahashi
-
Neilson
+
|Speaker = Naoko Kurahashi Neilson
-
|Position = IceCube
Scientist
+
|Position = IceCube
Postdoc, WIPAC (Wisconsin IceCube Particle Astrophysics Center)
-
|Institution = University of Wisconsin,
River Falls
+
|Institution = University of Wisconsin,
Madison
-
|Url = http://
www
.
uwrf
.edu/
PHYS/IceCube-Scientists.cfm
+
|Url = http://
wipac
.
wisc
.edu/
people
|Recorded =
|Recorded =
|Host = Brian Keating
|Host = Brian Keating
-
|Title =
Title: TBA
+
|Title =
"Discovery of Neutrinos from astrophysical sources with IceCube"
-
|Abstract =
Abstract: TBA
+
|Abstract =
High-energy neutrinos are thought to be emitted by astronomical objects such as active galactic nuclei, gamma-ray bursts, and supernova remnants. However, due to their small predicted flux and large backgrounds from neutrinos and muons created in the atmosphere, they had not been observed until now. The IceCube Neutrino Observatory instruments a cubic kilometer of ice at the South Pole to detect neutrinos mainly above 100GeV. In a high-energy (>20TeV) data set from the first 2 years of the full detector, an excess above atmospheric backgrounds is observed. These neutrino events are also incompatible in energy spectrum and arrival direction, therefore they are the first observation of astrophysical neutrinos. Studies on the arrival direction are performed to determine the exact astronomical sources, signaling the birth of neutrino astronomy.
}}
}}