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103 papers · 1 filter
Problems related to gauge invariance and momentum, spin decomposition in nucleon structure study
Fan Wang, W. M. Sun, X. S. Chen +1
How do the quark and gluon share the nucleon momentum? How does the nucleon spin distribute among its constituents? What means the quark and gluon momentum, spin and orbital angula…
Measuring the X-ray luminosities of SDSS DR7 clusters from RASS
Lei Wang, Xiaohu Yang, Shiyin Shen +8
We use ROSAT All Sky Survey (RASS) broadband X-ray images and the optical clusters identified from SDSS DR7 to estimate the X-ray luminosities around candidate cluste…
Dependence of the Length of Solar Filament Threads on the Magnetic Configuration
Y. H. Zhou, P. F. Chen, Q. M. Zhang +1
High-resolution H observations indicate that filaments consist of an assembly of thin threads. In quiescent filaments, the threads are generally short, whereas in active region…
The Ginger-shaped Asteroid 4179 Toutatis: New Observations from a Successful Flyby of Chang'e-2
Jiangchuan Huang, Jianghui Ji, Peijian Ye +26
On 13 December 2012, Chang'e-2 conducted a successful flyby of the near-Earth asteroid 4179 Toutatis at a closest distance of 770 120 meters from the asteroid's surface. The…
gravity: effects on astronomical observation and Solar System experiments and upper-bounds
Yi Xie, Xue-Mei Deng
As an extension of a previous work in which perihelion advances are considered only and as an attempt to find more stringent constraints on its parameters, we investigate effects o…
Parallaxes for W49N and G048.60+0.02: Distant Star Forming Regions in the Perseus Spiral Arm
B. Zhang, M. J. Reid, K. M. Menten +4
We report trigonometric parallax measurements of 22 GHz HO masers in two massive star-forming regions from VLBA observations as part of the BeSSeL Survey. The distances of $11.…