搜索结果: 1-13 共查到“物理学 astrophysical”相关记录13条 . 查询时间(0.236 秒)
近日，空间与环境学院符慧山教授指导的本科生陈晓航的研究成果“Magnetic Nulls in the Reconnection Driven by Turbulence”刊发于国际顶级天体物理杂志《The Astrophysical Journal》（简称ApJ），该研究从观测上揭示了由湍动引发的磁重联中，磁零点的三维磁场结构和零点附近电流的关系。磁重联是空间物理、天体物理和实验等离子体物理中一...
Sc III Spectral Properties of Astrophysical Interest
Oscillator strengths lifetimes solar photosphere
2011/8/18
Abstract: Transition properties such as oscillator strengths, transition rates, branching ratios and lifetimes of many low-lying states in the doubly ionized scandium (Sc III) are reported. A relativi...
Opportunities to constrain astrophysical reaction rates for the s-process through determination of the ground state cross sections
nuclear reactions nucleosynthesis abundances
2011/7/21
Modern models of s-process nucleosynthesis in stars require stellar reaction rates with high precision. Most of the neutron capture cross sections in the s-process have been measured and for an increa...
Fe XVII X-ray Line Ratios for Accurate Astrophysical Plasma Diagnostics
atomic data atomic processes line: formation opacity plasmas X-rays:general.
2011/9/14
New laboratory measurements using an Electron Beam Ion Trap (EBIT) and an x-ray microcalorimeter are presented for the n=3 to n=2 Fe XVII emission lines in the 15 ?to 17 ?range, along with new theoret...
Constraining the S factor of 15N(p,g)16O at Astrophysical Energies
Constraining the S factor of 15N(p,g)16O Astrophysical Energies
2011/1/4
The 15N(p,g)16O reaction represents a break out reaction linking the first and second cycle of the CNO cycles redistributing the carbon and nitrogen abundances into the oxygen range. The reaction is d...
Modeling maximum astrophysical gravitational recoil velocities
Modeling maximum astrophysical gravitational recoil velocities
2010/12/20
We measure the recoil velocity as a function of spin for equal-mass, highly-spinning black-hole
binaries, with spins in the orbital plane, equal in magnitude and opposite in direction. We con rm that...
Cosmological Birefringence: an Astrophysical test of Fundamental Physics
Cosmological Birefringence Astrophysical test Fundamental Physics
2010/12/21
We review the methods used to test for the existence of cosmological birefringence, i.e. a rotation of the plane of linear polarization for electromagnetic radiation traveling over cosmological distan...
Towards Microscopic Ab Initio Calculations of Astrophysical S-Factors
Microscopic Ab Initio Calculations Astrophysical S-Factors
2011/1/6
Low energy capture cross sections are calculated within a microscopic many-body approach
using an effective Hamiltonian derived from the Argonne V18 potential. The dynamics is treated
within Fermion...
Workshop on Gamma-ray Bursts and other high energy astrophysical phenomena
Observational Constraints on the Completeness of Space near Astrophysical Objects
Space near Astrophysical Objects double pulsar
2010/3/18
We consider the observational effects of a deficit angle, w, in the topology of the solar system and in the 'double pulsar' system PSR J0737-3039A/B. Using observations of the perihelion precession of...
Study of Proton Resonances in 22Mg by Resonant Elastic Scattering of 21Na+p and Its Astrophysical Implication
nuclear astrophysics reaction rate nuclear structure and property
2009/10/29
Proton resonant states in 22Mg have been investigated by the resonant elastic scattering of 21Na+p. The 21Na beam with a mean energy of 4.00 MeV/u was separated by the CNS radioactive ion beam separat...
Nuclear problems in astrophysical q-plasmas and environments
Astrophysics plasma Nuclear reactions Nonextensive statistical mechanics
2010/7/5
Experimental measurements in terrestrial laboratory, space and astrophysical observations of variation and fluctuation of nuclear decay constants, measurements of large enhancements in fusion reaction...
Quantum Uncertainty in Weakly Non-Ideal Astrophysical Plasma
Quantum Uncertainty Weakly Non-Ideal Astrophysical Plasma
2010/10/14
Galitskii and Yakimets showed that in dense or low temperature plasma, due to quantum uncertainty effect, the particle distribution function over momenta acquires a power-like tail even under conditio...