搜索结果: 1-15 共查到“天文学 theory”相关记录61条 . 查询时间(0.268 秒)
2017弦理论和宇宙学高登研究研讨会 （The Gordon Research Seminar on String Theory and Cosmology）
2017 弦理论和宇宙学高登研究 研讨会
2017/2/15
The Gordon Research Seminar on String Theory and Cosmology is a unique forum for graduate students, post-docs, and other scientists with comparable levels of experience and education to present and ex...
2017弦理论和宇宙学戈登学术会议（The 2017 Gordon Research Conference on String Theory&Cosmology）
2017 弦理论和宇宙学戈登 学术会议
2017/1/11
This is the second Gordon Research Conference in the series on String Theory and Cosmology, initiated in Hong Kong in 2015. Cosmology, once a philosophical subject, has matured into a precision scienc...
2017弦理论和宇宙学戈登学术会议（The 2017 Gordon Research Conference on String Theory&Cosmology）
2017弦理论和宇宙学戈登学术会议
2017/1/10
This is the second Gordon Research Conference in the series on String Theory and Cosmology, initiated in Hong Kong in 2015. Cosmology, once a philosophical subject, has matured into a precision scienc...
The School on String Theory, Quantum Field Theory and Geometry of Spacetime
Quantum Field Theory and Geometry Geometry of Spacetime
2016/7/19
The School on String Theory, Quantum Field Theory and Geometry of Spacetime will take place at Tsinghua University, Beijing, China, from July 24 to July 28, 2016, the week before Strings 2016. Topics ...
Scientists ditch approximations,begin modeling universe with Einstein’s full theory of General Relativity
Scientists ditch approximations modeling universe Einstein’s full theory General Relativity
2016/7/4
Research teams on both sides of the Atlantic have shown that precise modeling of the universe and its contents will change the detailed understanding of the evolution of the universe and the growth of...
New Theory Turns Back Clock on Conditions Behind Universe's Origin
Turns Back Clock Universe's Origin
2016/2/22
In a new study, scientists from The University of Texas at Dallas and their colleagues suggest a novel way for probing the beginning of space and time, potentially revealing secrets about the conditio...
We present a theory for describing the evolution of a galaxy caused by stochastic events such as weak mergers, transient spiral structure, orbiting blobs, etc. This noise excites large-scale patterns ...
宇宙尘埃的生命周期:观察,理论,实验研讨会（The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments）（图）
宇宙尘埃 生命周期:观察,理论,实验 研讨会
2013/11/1
This meeting aims to address the life cycle of dust in the Universe, which covers the formation, evolution and destruction of dust in a range of environments, ranging from the smallest to the largest ...
Theory of magnetic reconnection in solar and astrophysical plasmas
Theory magnetic reconnection solar astrophysical plasmas
2012/2/23
Magnetic reconnection is a fundamental process in a plasma that facilitates the release of energy stored in the magnetic field by permitting a change in the magnetic topology. In this article we prese...
Pre-big bang collapsing universe from modern Kaluza-Klein theory of gravity
Pre-big bang collapsing universe modern Kaluza-Klein theory gravity
2011/10/18
We study the collapse of the universe described by a scalar field spherically symmetric collapse of a system described by a massless scalar field from a 5D Riemann-flat canonical metric, on which we m...
Asymptotically safe gravity as a scalar-tensor theory and its cosmological implications
Asymptotically gravity scalar-tensor theory cosmological implications
2011/10/14
We study asymptotically safe gravity with Einstein-Hilbert truncation taking into account the renormalization group running of both gravitational and cosmological constants. We show the classical beha...
On the redundancy of operators and the bispectrum in the most general second-order scalar-tensor theory
redundancy operators bispectrum general second-order scalar-tensor theory
2011/10/19
In this short note we explain how to use the linear equation of motions to simplify the third-order action for the cosmological fluctuations. No field redefinition is needed in this exact procedure wh...
We work out an effective theory of accelerated expansion to describe general phenomena of inflation and acceleration (dark energy) in the Universe. Our aim is to determine from theoretical grounds, in...
A sufficient condition for de Sitter vacua in type IIB string theory
moduli stabilization string vacua ux compacti cations
2011/10/18
We derive a sufficient condition for realizing meta-stable de Sitter vacua with small positive cosmological constant within type IIB string theory flux compactifications with spontaneously broken supe...
Manifestly gauge invariant theory of the nonlinear cosmological perturbations in the leading order of the gradient expansion
nonlinear cosmological perturbation, gauge invariance, non-Gaussianity PACS number(s):98.80.Cq
2011/9/29
In the full nonlinear cosmological perturbation theory in the leading order of the gradient expansion, all the types of the gauge invariant perturbation variables are defined. The metric junction cond...