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Home > Papers > Astronomy

There are 34 papers published in subject: since this site started.

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	1. Spin, Deformation of Celestial Bodies and Two-Body Gravitational Systems
	Tian WenJie
	Astronomy 15 October 2009
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	Abstract:We apply the theory of incompressible fluid to simulate the deformation of massive celestial bodies and work out the equation of static equilibrium state. The generalized equipotential conditions on the surface give rise to the surface equations, which reflect both the local properties and the global distributive characters. Subsequently, practical examination of the surface equation concludes that this model succeeds in interpreting the degree of magnitude of certain quantities, yet needs improvements for fine analysis. The addition of spinning properties transforms a standard sphere into a rotational ellipsoid, whose mass centroid shifts away from the gravitational center, and leads to nonvanishing moment of gravity by external particles. In the end, we use Lagrangian and Hamiltonian mechanics to analyze the two-body gravitational systems with spin parameters, and come up with the analytical Lagrangian and the integrals of motion, and put forward some suggestions for the modification of this formulation.
	TO cite this article:Tian WenJie . Spin, Deformation of Celestial Bodies and Two-Body Gravitational Systems[OL].[15 October 2009] http://en.paper.edu.cn/en_releasepaper/content/35816


	2. A Toy Model for 3:2:1 Ratio of HFQPOs in XTE J1550-564
	Yong-Chun Ye,Chang-Yin Huang,Wei-Hua Lei,Ding-Xiong Wang
	Astronomy 21 September 2009
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	Abstract:Based on a toy model of coexistence of the Blandford-Znajek (BZ) and magnetic coupling (MC) processes with a non-axisymmetric magnetic field, we explain a puzzling 3:2:1 ratio of the high-frequency Quasi-Periodic Oscillation (HFQPO) in XTE J1550-564. It turns out that two frequencies of the HFQPO can be fitted by two rotating magnetic hotspots arising from the MC process, and the other HFQPO frequency is related to a magnetic hotspot produced in the BZ process. Based on the block of the medium shell surrounding a black hole we discuss the astrophysical environment required by the transition between low/hard (LH) and steep power-law (SPL) states and the association of jet and HFQPOs with the LH and SPL states observed in XTE J1550-564.
	TO cite this article:Yong-Chun Ye,Chang-Yin Huang,Wei-Hua Lei, et al. A Toy Model for 3:2:1 Ratio of HFQPOs in XTE J1550-564[J].

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	3. New Periodic Solutions for Planar 5–Body and 7-Body Problems
	Su Xia,Zhang Shiqing
	Astronomy 11 March 2009
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	Abstract:For planar Newtonian N + 2-body (N=3,5)problems with some mass ratios, we prove the existence of new non-collision periodic solutions such that N bodies with equal masses move on one loop and the other 2 bodies with equal masses move on the other one or two closed curves and have some given winding numbers and symmetries.
	TO cite this article:Su Xia,Zhang Shiqing. New Periodic Solutions for Planar 5–Body and 7-Body Problems[OL].[11 March 2009] http://en.paper.edu.cn/en_releasepaper/content/30164


	4. Variational Minimizing Solutions for Planar Circular Restricted 3-Body Problems
	Zhang Shiqing
	Astronomy 03 March 2009
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	Abstract:We use some inequalities to study planar Newtonian circular restricted 3- body problems with two equal primaries, we prove that the minimizer of the Lagrangian action on “8” type symmetric loop spaces of the rotational coordinate systems is just at the center of masses, which implies that we must add topological conditions in order to get the true “8”–type solutions.
	TO cite this article:Zhang Shiqing. Variational Minimizing Solutions for Planar Circular Restricted 3-Body Problems[OL].[ 3 March 2009] http://en.paper.edu.cn/en_releasepaper/content/29855


	5. Periodic Solutions for Some Second Order Hamiltonian Systems
	Zhang Shiqing
	Astronomy 27 February 2009
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	Abstract:We use saddle point theorems of Benci-Rabinowitz and Silva to study the existence of periodic solutions with a fixed energy for a few second order Hamiltonian conservative systems without any symmetry,the key difficulty of the proof is proving Palais-Smale condition and the nonconstant property for the minimax critical point.
	TO cite this article:Zhang Shiqing. Periodic Solutions for Some Second Order Hamiltonian Systems [OL].[27 February 2009] http://en.paper.edu.cn/en_releasepaper/content/29753


	6. Questioning the Doppler interpretation of cosmological red shifts
	Jian-Miin Liu
	Astronomy 21 April 2008
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	Abstract:The Doppler interpretation of cosmological red shifts attributes these red shifts to only the relativistic Doppler effect of light coming from receding galaxies. We question this interpretation of cosmological red shifts. The Doppler interpretation of cosmological red shifts fails to catch the main cause of cosmological red shifts, namely the Universe’s evolution in the gravitational field of the Universe. This interpretation also fails to show the rationality of it as a theory. It contains an absurdity from the logical point of view, which makes us believe in that it must be misleading.
	TO cite this article:Jian-Miin Liu. Questioning the Doppler interpretation of cosmological red shifts[OL].[21 April 2008] http://en.paper.edu.cn/en_releasepaper/content/20672


	7. A possible way to identify the fingerprint of the universe
	Deng Xiaoming
	Astronomy 21 January 2008
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	Abstract:There is a phenomenon that the inverse image of a given celestial object could in principle be seen in negative directions in a closed universe which there is no horizon problem, but it is difficult to detect the individual case in practice. The large-scale distribution of galaxies in this matter has been discussed. Although there are many adverse factors, a possible way to identify the distribution pattern of galaxies is shown in the present paper.
	TO cite this article:Deng Xiaoming. A possible way to identify the fingerprint of the universe[OL].[21 January 2008] http://en.paper.edu.cn/en_releasepaper/content/18237


	8. To disabuse the map of the universe
	Deng Xiaoming
	Astronomy 15 October 2007
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	Abstract:The redshift distribution of galaxies (SDSS data) on the logarithmic map of the universe is explained by the linear expansion hyperspherical model. Our computed result show that the density distribution of galaxies take two peaks at redshift 0.108 and 0.362 and two minimum at redshift 0.229 and 0.510. It is shown that our model may fit the map well. It is proposed that celestial sphere should be defined by the comoving coordinates system.
	TO cite this article:Deng Xiaoming. To disabuse the map of the universe[OL].[15 October 2007] http://en.paper.edu.cn/en_releasepaper/content/15662


	9. Dark matter may be invisible gravitational ghost images and not the real matter imagined
	Deng Xiaoming
	Astronomy 14 July 2006
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	Abstract:According to the polar effect in the hyperspherical universe, we realize that “Dark matter” may be invisible gravitational ghost images originating from the matter around the poles and not the real natural matter. The twin pictures of the visible optical (electromagnetic) universe and the invisible gravitational ghost image universe are shown.
	TO cite this article:Deng Xiaoming. Dark matter may be invisible gravitational ghost images and not the real matter imagined[OL].[14 July 2006] http://en.paper.edu.cn/en_releasepaper/content/7591


	10. Discussion about the Mechanism of Coplanar Planet
	Li Fangxing
	Astronomy 15 May 2006
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	Abstract:: Based on the model of planets revolving round the Sun established in the paper, it is found that there exist same direction revolving and opposite direction revolving. Revolving time of the two process is complete same, but both revolving directions are reverse. The directions of their quadrature components are complete opposite and values of quadrature component aren’t equal. Quadrature component makes orbit plane deflect, after one comparative periods finish, orbit plane deflects a certain angle along the direction of greater quadrature component, and the angle was unceasingly cumulated, at last, the two planets revolve in a common plane.
	TO cite this article:Li Fangxing . Discussion about the Mechanism of Coplanar Planet[OL].[15 May 2006] http://en.paper.edu.cn/en_releasepaper/content/6601

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