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Do Fermi-LAT observations really imply very large Lorentz factors in GRB outflows ?
gamma-ray burst: general gamma-ray burst: individual: GRB 080916C radiative transfer radiation mechanisms: non-thermal
2011/10/20
Recent detections of GeV photons in a few GRBs by Fermi-LAT imply huge bulk Lorentz factors to avoid a large gamma gamma optical depth at high energy. Estimates can be as high as Gamma ~ 1000 in the m...
Gyromagnetic Factors and Atomic Clock Constraints on the Variation of Fundamental Constants
Gyromagnetic Factors Atomic Clock Constraints Variation Fundamental Constants
2011/10/14
We consider the effect of the coupled variations of fundamental constants on the nucleon magnetic moment. The nucleon g-factor enters into the interpretation of the measurements of variations in the f...
Estimates of Densities and Filling Factors from a Cooling Time Analysis of Solar Microflares Observed with RHESSI
Estimates Densities Filling Factors Solar Microflares
2011/10/12
We use more than 4,500 microflares from the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) microflare data set (Christe et al., 2008, Ap. J., 677, 1385) to estimate electron densities a...
A simple analytic model for astrophysical S-factors
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/29
We propose a physically transparent analytic model of astrophysical S-factors as a function of a center-of-mass energy E of colliding nuclei (below and above the Coulomb barrier) for non-resonant fusi...
The Effect of Screening Factors and Thermonuclear Reaction Rates in the Pre-main Sequence Evolution of Low Mass Stars
Low mass stars thermonuclear reaction rates electron screening factors composition changes
2010/9/15
In understanding the nucleosynthesis of the elements in stars,one of the most important quantities is the reaction rate and it must be evaluated in terms of the stellar temperature T , and its determi...
ITERATION FACTORS IN THE LINE FORMATION PROBLEM WITH FREQUENCY DEPENDENT SOURCE FUNCTION
Radiative transfer Line: formation methods: numerical
2010/10/29
In this paper some iteration factors families introduced previously to solve the pure line transfer problem are generalized to the case when the background continuum is taken into account.The converge...
ON THE FRANCK-CONDON FACTORS AND R-CENTROIDS OF THE ASTROPHYSICALLY INTERESTING MOLECULE CS
Molecular data - Methods numerical - Sun abundances - Stars abun-dances
2009/2/11
ON THE FRANCK-CONDON FACTORS AND R-CENTROIDS OF THE ASTROPHYSICALLY INTERESTING MOLECULE CS.
专著信息
书名
Black Hole Masses and Doppler Factors of Gamma-Ray Active Galactic Nuclei
语种
英文
撰写或编译
作者
范忠辉,曹新伍
第一作者单位
出版社
2004,ApJ,
出版地
出版日期
2004年
月
日
标准书号
介质类型
页数
字数
开本
相关项目
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