Advanced Studies in Theoretical Physics最新文献_第5页

Dynamics of double galactic system on the background of dark substance 暗物质背景下的双星系动力学

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2014.47102

L. Chechin, А. Yelibaeva

{"title":"Dynamics of double galactic system on the background of dark substance","authors":"L. Chechin, А. Yelibaeva","doi":"10.12988/ASTP.2014.47102","DOIUrl":"https://doi.org/10.12988/ASTP.2014.47102","url":null,"abstract":"In this article we searched the dynamics of double galactic system (the Local Group of galaxies, as example) on the background of dark substance, including both dark energy and dark matter. For modern cosmology the study influence on the dynamics of the Local Group not only the dark energy, but also the second most important component of dark substance dark matter is rather actually today. The study of dark energy in nearby Universe becomes significant and perspective for the observations at large space scales where it was discovered for the first time. That is why we constructed the Lagrangian of such dynamical system for more correctly searching the dynamics of Local Group. Such approach allowed, instead of the initially forwarded rectilinear trajectory found its more realistic one. Talk about the real elliptical trajectory, more accurate resulting expression for the revolving time and the relaxation time due to accounting the contribution of the dark substance. The results show that the contribution of the dark substance in the total amount of revolving time of galaxies is about 10%. All these results are astronomically observable quantities and testify the strict accounting of the dark substance properties within the Local Group of galaxies.","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"83 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126073583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic algorithms with exons and introns for the satisfiability problem 可满足性问题的外显子和内含子遗传算法

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2013.13034

V. Popov

引用次数: 13

Cosmological exact solutions of Petrov type D of a nonlinear asymptotic fluid to a dark energy fluid in real and complex geometries with double singularity. Second case. 具有双奇点的实和复几何中非线性渐近流体到暗能量流体的Petrov型D的宇宙学精确解。第二个案例。

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2021.91675

R. Alvarado

{"title":"Cosmological exact solutions of Petrov type D of a nonlinear asymptotic fluid to a dark energy fluid in real and complex geometries with double singularity. Second case.","authors":"R. Alvarado","doi":"10.12988/astp.2021.91675","DOIUrl":"https://doi.org/10.12988/astp.2021.91675","url":null,"abstract":"Abstract In this paper, exact solutions to the Einstein’s equations are obtained for an anisotropic and homogeneous symmetry of Petrov Type D from a nonlinear fluid that responds to the equation of state Q+Q− = 0 where Q± = √ μ1 (−2P1 + μ1) ± 2 BP1 a wherein μ1 = μ − Λ, P1 = P + Λ, and μ, P and Λ are the volumetric energy density, the pressure, and a constant linked to the concept of dark energy. That equation of state and what it represents in certain limits of time (when t→ 0 and when t → ∞) are also analyzed. Two general solutions which are different because of the degree of initial expansion that a coordinate can have in relation to a perpendicular plane are obtained. For each solution, two cases are present: one represents a space-time with real geometry (R) for all the values of t, and asymptotically in time, this case becomes an isotropic space-time of FLRW of a dark energy fluid; and the other one presents a double singularity, so that since the first singularity, space-time is complex (C) until a certain time t = a ( when the second singularity is present) from which space-time is real (R) and with the increase of time, it tends to an isotropic space-time of FLRW from a dark energy fluid. Then, temperature behavior in relation to time is obtained.","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125420709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hall effect on non-commutative plane with space-space non-commutativity and momentum-momentum non-commutativity 空间-空间非交换性和动量-动量非交换性非交换平面上的霍尔效应

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2017.614

W. Chung

引用次数: 0

Effect of Laser Radiation on the Energy Spectrum of 2D Electrons with Rashba Interaction 激光辐射对二维电子与Rashba相互作用能谱的影响

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2014.4680

S. V. Kryuchkov, E. I. Kukhar, V. Konchenkov

引用次数: 1

A classification of elementary Particles in d=4 following a simple geometrical hypothesis in real space d=4中基本粒子的分类，遵循一个简单的几何假设

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2013.3778

N. Olivi-Tran, Nicolas Gottiniaux

引用次数: 4

General spherically symmetric gravity interacting with massive complex scalar field 广义球对称引力与大质量复标量场的相互作用

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2019.915

A. Zecca

{"title":"General spherically symmetric gravity interacting with massive complex scalar field","authors":"A. Zecca","doi":"10.12988/astp.2019.915","DOIUrl":"https://doi.org/10.12988/astp.2019.915","url":null,"abstract":"Interaction of gravity with complex massive scalar field is considered by coupling the scalar field equation to the Einstein field equation whose source term is given by the Energy Momentum tensor of the scalar field. Assuming general spherically symmetric space time, the scalar field results to depend only on time and radial coordinate. In turn this implies consistency of the scheme that is, both the vanishing of the divergence of the Energy Momentum tensor of the scalar field and the independence of its trace from the angular variables. The explicit scheme of coupled partial differential equations is partially integrated twice on general ground. This leads to a partial differential equation that can be interpreted as a generalized Kepler like equation whose solution is difficult. To have some information about explicit solutions, a method of variable separation integration is employed by considering suitable special assumptions. The cases considered are essentially those in which the scalar field is assumed to depend on one only variable. There result situations in which, among other, a homogenization effect is recovered. Also a cosmological interpretation of the results could be possible on condition of solving systems of coupled non-linear separated differential time equations","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122320785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cosmological exact solutions set of a perfect fluid in an anisotropic space-time in Petrov type D Petrov型D中各向异性时空中完美流体的宇宙学精确解集

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2016.6311

R. Alvarado

引用次数: 21

Chaos control for the Lorenz system 洛伦兹系统的混沌控制

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2018.8413

P. P. C. Alzate, Germán Correa Vélez, F. Mesa

引用次数: 1

Blind source separation of HPGe output signals: a new pulse pile-up correction method 高压锗输出信号的盲源分离:一种新的脉冲堆积校正方法

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2014.4563

A. Mekaoui, E. Hamzaoui, R. Moursli

引用次数: 1