Bulletin of the American Physical Society
APS April Meeting 2013
Volume 58, Number 4
Saturday–Tuesday, April 13–16, 2013; Denver, Colorado
Session H4: Invited Session: Dark Energy |
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Sponsoring Units: DAP DPF Chair: Marcelo Gleiser, Dartmouth College Room: Plaza F |
Sunday, April 14, 2013 10:45AM - 11:21AM |
H4.00001: Dark Energy Theory Invited Speaker: Rachel Bean |
Sunday, April 14, 2013 11:21AM - 11:57AM |
H4.00002: Dark Energy Survey: understanding the acceleration of the Universe Invited Speaker: Jiangang Hao The Dark Energy Survey (DES) is a next generation optical survey aimed at understanding the expansion rate of the universe using four complementary methods: weak gravitational lensing, galaxy cluster counts, baryon acoustic oscillations, and Type Ia supernovae. Using a new 570 Megapixel CCD camera mounted on the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory in Chile, the survey will image over 5000 square-degrees of the southern galactic cap with 5 filters (g, r, i, z, Y) in 5 years and improve the constraints on the evolution of the equation of state of Dark Energy by a factor of 3 - 5. After achieving first light on Sept. 12, 2012, the DES is moving forward at amazing speed. Commissioning was carried out in Sept-Oct., 2012, followed by Science Verification that was successfully completed by February 2013. During the Science Verification, DES has been focusing on three patches of the sky, imaging a couple of hundred square degrees at full DES depth. Of the three patches, one is along the southern celestial equatorial region, overlapping with many existing optical surveys for better calibration, and the other two are overlapping with the South Pole Telescope (SPT) Sunyaev-Zel'dovich survey in the southern sky. The official survey will start in Sept. 2013 and a lot of exciting science is just ahead. [Preview Abstract] |
Sunday, April 14, 2013 11:57AM - 12:33PM |
H4.00003: Dark Energy Experiments: The Road Ahead Invited Speaker: Jeffrey Newman The nature of Dark Energy is currently being investigated by a number of ongoing experiments, including the Dark Energy Survey discussed in the preceding talk. In order to better probe this frontier physics, a variety of new projects will begin operations over the next decade. These experiments will utilize multiple methods both to test whether the explanation for cosmic acceleration is consistent with General Relativity and to constrain the properties of Dark Energy if it is the cause of the Universe's accelerating expansion. In this talk, I will give a broad overview of the new instruments and telescopes now being designed that should revolutionize our understanding of Dark Energy in the next two decades. I will focus most on the LSST and MS-DESI projects, which are currently advancing through the U.S. Department of Energy's Critical Decision process. [Preview Abstract] |
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