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Dark Radiation Emerging After Big Bang Nucleosynthesis?
Cosmology BBN CMB Equation of state
2010/11/16
We show how recent data from observations of the cosmic microwave back-ground may suggest the presence of additional radiation density which appeared after big bang nucleosynthesis. We propose a gener...
Distribution of Magnetic Shear Angle in an Emerging Flux Region
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We study the distribution of magnetic shear in an emerging flux region using the high-resolution Hinode/SOT SP observations. The distribution of mean magnetic shear angle across the active region show...
Modified gravity emerging from thermodynamics and holographic principle
law of entropy thermodynamics holographic principle
2010/3/19
We discuss three different corrections to the area law of entropy. The number of bits $N$ is then modified according to the form of entropy, and the law of gravity is obtained by using the method deve...
Herbig-Haro Jets Emerging from a Neutral Cloud into a H II region
Herbig-Haro Jets Neutral Cloud H II region
2009/6/18
Herbig-Haro Jets Emerging from a Neutral Cloud into a H II region。