scholarly journals What can the detection of a single pair of circles-in-the-sky tell us about the geometry and topology of the Universe?

2011 ◽  
Vol 84 (8) ◽  
Author(s):  
B. Mota ◽  
M. J. Rebouças ◽  
R. Tavakol
Keyword(s):  
Single Pair ◽  
And Topology ◽  
Topology Of The Universe ◽  
The Universe

Signature of Topology of the Universe

2018 ◽  
Vol 2 (01) ◽  
Author(s):  
Vipin Kumar Sharma
Keyword(s):  
General Relativity ◽  
Energy Density ◽  
Local Geometry ◽  
Microwave Background ◽  
Main Motivation ◽  
And Topology ◽  
The Standard Model ◽  
Topology Of The Universe ◽  
The Universe ◽  
Insight Into

The main motivation to write this article is to relate the cosmology and topology in order to gain some insight into the topological signatures of the Standard model of Universe. The theory of General Relativity as given by Einstein only describes the local geometry of space but not global, hence leaves the possibility to explore the topology of the space (simply- or multi-connected). By expressing the cosmological model in trms of energy density parameters, we attempt to understand the geometry of spacetime. This is followed by a discussion on the possibility to detect the signatures of topology of space imprinted on the Cosmic Microwave Background (CMB).

scholarly journals ON THE ESTIMATION OF THE CURRENT VALUE OF THE COSMOLOGICAL CONSTANT

2003 ◽  
Vol 18 (08) ◽  
pp. 561-568 ◽  
Author(s):  
V. G. GURZADYAN ◽  
SHE-SHENG XUE
Keyword(s):  
Cosmological Constant ◽  
Critical Density ◽  
Matter Density ◽  
Fundamental Constants ◽  
Vacuum Fluctuations ◽  
The Past ◽  
And Topology ◽  
Current Value ◽  
Topology Of The Universe ◽  
The Universe

We advance the viewpoint that, only relevant modes of the vacuum fluctuations, namely, with wavelengths conditioned by the size, homogeneity, geometry and topology of the Universe, do contribute to the cosmological constant. A formula is derived which relates the cosmological constant with the size of the Universe and the three fundamental constants: the velocity of light, Planck and Newton gravitational constants. Then the current value of the cosmological constant remarkably agrees with the value indicated by distant supernovae observations, i.e. of the order of the critical density. Thus the cosmological constant had to be smaller than the matter density in the past and will be bigger in the future.

scholarly journals Planck2013 results. XXVI. Background geometry and topology of the Universe

2014 ◽  
Vol 571 ◽  
pp. A26 ◽  
Author(s):  
◽  
P. A. R. Ade ◽  
N. Aghanim ◽  
C. Armitage-Caplan ◽  
M. Arnaud ◽  
...  
Keyword(s):  
And Topology ◽  
Topology Of The Universe ◽  
The Universe

Wormholes and large-scale topology of the Universe

1996 ◽  
Vol 111 (12) ◽  
pp. 1433-1438 ◽  
Author(s):  
Zhen-Qiang Tan ◽  
You-Gen Shen
Keyword(s):  
Large Scale ◽  
Topology Of The Universe ◽  
The Universe

Study on using generative and topology design for feature enrichment in Mars Rovers

2021 ◽  
pp. 87-93
Author(s):  
Abhijith Ram C ◽  
D Ajith
Keyword(s):  
Additive Manufacturing ◽  
Solar System ◽  
Weight Reduction ◽  
Topology Design ◽  
Space Travel ◽  
Design For Additive Manufacturing ◽  
And Topology ◽  
Flexibility Design ◽  
The Origin Of Life ◽  
The Universe

Space travel has always been a crucial task. Exploration and experimenting on Planets in our solar system will help us understand the universe better and also, we could find the origin of life. Rovers play an important role in finding these answers. The problem we have at present is not only with technology to explore the universe but also the ability of our rockets to carry rovers to other rocks. Since a large amount of fuel is required for Space travel, we end with very little cargo that can be sent to explore. As additive manufacturing started to play a vital part in Mechanical Science, we are going to try to use that tool to build a Generative design that helps in parts consolidation, weight reduction, increase flexibility, design optimisation and cost consolidation. Since weight is an important aspect, we could reduce the present rover weight and add additional scientific tools to the rover to increase its scope of search and applications. This project focuses on features enrichment in Rovers by optimizing rover weight and design using Design for Additive Manufacturing concept.

Topology of the Universe

1987 ◽  
pp. 461-475 ◽  
Author(s):  
L. Z. Fang ◽  
H. J. Mo
Keyword(s):  
Topology Of The Universe ◽  
The Universe

scholarly journals Are there Ghost Images of the Coma Cluster at other Redshifts?

1999 ◽  
Vol 183 ◽  
pp. 263-263
Author(s):  
Boudewijn F. Roukema
Keyword(s):  
Fundamental Property ◽  
Infinite Volume ◽  
Coma Cluster ◽  
Negatively Curved ◽  
Image Position ◽  
Topology Of The Universe ◽  
The Universe ◽  
Ghost Images

The topology of the Universe is a fundamental property of our Universe according to Friedmann-Lemaître models[3, 9, 7], but has not yet been reliably measured. As pointed out by Sato[12], the Universe may be finite even though flat or negatively curved: infinite volume of a hypersurface.

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