PHYSICS/BK21 SEMINAR (08/11/12)
관련링크
본문
"“Origin of Dark-Energy and Accelerating Universe”
Speaker : visiting Prof. Keum-Yong Yeon [APCTP]
Place : Physics Seminar Room (Science Bldg, 3-201)
Date & Time : Nov, 12(Wed) 4:00 ~ 5:00 pm
ABSTRACT:
After SN1a and WMAP observations during last decade, the discovery of the accelerated expansion of the universe is a major challenge of astro-particle physics and cosmology. There are currently three candidates for the Dark-Energy which drives this accelerated expansion: 1) a non-zero cosmological constant, 2) an ultralight scalar field (quintessence field), 3) modifications of Einsteins theory of gravity. In this talk, we review briefly the main idea of three possible candidates and their relatied phenomena. We discuss a way how we can determine the origin of dark-energy in future experiments. As a special case, we investigate interacting mechanism between the dark-energy and the dark-matter (neutrinos). We study CMB-radiation and large scale structure of the Universe, and find that evolution of neutrino masses is determined by quintessence, which is responsible for the cosmic acceleration today. Finally, we discuss prospects of dark-energy search for the forthcoming 20 years.
Contact Person : Prof. Jai Sam Kim(054-279-2077, jsk@postech.ac.kr)"
Speaker : visiting Prof. Keum-Yong Yeon [APCTP]
Place : Physics Seminar Room (Science Bldg, 3-201)
Date & Time : Nov, 12(Wed) 4:00 ~ 5:00 pm
ABSTRACT:
After SN1a and WMAP observations during last decade, the discovery of the accelerated expansion of the universe is a major challenge of astro-particle physics and cosmology. There are currently three candidates for the Dark-Energy which drives this accelerated expansion: 1) a non-zero cosmological constant, 2) an ultralight scalar field (quintessence field), 3) modifications of Einsteins theory of gravity. In this talk, we review briefly the main idea of three possible candidates and their relatied phenomena. We discuss a way how we can determine the origin of dark-energy in future experiments. As a special case, we investigate interacting mechanism between the dark-energy and the dark-matter (neutrinos). We study CMB-radiation and large scale structure of the Universe, and find that evolution of neutrino masses is determined by quintessence, which is responsible for the cosmic acceleration today. Finally, we discuss prospects of dark-energy search for the forthcoming 20 years.
Contact Person : Prof. Jai Sam Kim(054-279-2077, jsk@postech.ac.kr)"
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