Cosmology

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Questions related to Cosmology

Does a transformation of dimensionless complex Minkowski coordinates to quaternions lead to a new cosmology?

Dimensionless complex Minkowski coordinates u are given as: u=t+i*(x,y,z); The Minkowski coordinates in legth units are given as: U=t*cT0+i*R*(x,y,z); R is a very large length, T0 is an arbitrary...

05 November 2017 10,207 18 View

Does Occam's razor favor MACHOs as candidates for Dark Matter?

Dear All, not only in our university, but almost in all well known to me lectures about Dark Matter, MACHOs (Massive Astrophysical Compact Halo Objects) are rather incidentally discussed while...

26 October 2017 9,778 2 View

Does length dilatation on transport in a curved finite isotropic space answer unsolved problems in cosmology?

Geodesics in a curved finite space are not parallel. Volumes transported over cosmic distances therefore will alter their shape and orientation in respect to initial conditions.  If compared with...

29 September 2017 1,570 15 View

How to probe the local gravitational potential originating from remote masses of the universe?

Is the inertia of accelerating masses to be interpreted as due to interaction with the local gravitational potential originating from remote masses of the universe? A gravitational drag experiment...

22 September 2017 8,942 32 View

Does an isotropic static gravitational potential exist in our universe?

A compact topological model which relates displacement and rotation isotropically leads to diverging geodesics. A volume of points which individually follow these geodesics becomes expanded during...

29 August 2017 4,846 12 View

Is speed of light constant all over the universe and equal to what we measured?

What are the evidences that speed of light is constant all over the universe? Is it the same value even in places in universe which dark energy is occupied?

20 July 2017 5,612 20 View

What on (rather off) Earth is a Boson Star?

I have just spent two decades thinking we had a supermassive black hole at the center of our galaxy.  Now I hear its a Boson Star.  Is this right, and does anybody out there know what one of these...

13 July 2017 9,087 7 View

What does the Friedmann model describe?

The Friedmann model of the universe forms the basis of the Standard Model. Yet, it is usually considered not as a pair of evolution equations, but, rather, a condition where the Hubble parameter...

29 June 2017 7,436 1 View

NASA is planning "touching the sun". How close to Sun can life "in any form" exist?

What is the "mind of the astronaut" in wanting to get close to the star? Is it like touching the Ï"within?  The closer one reaches the star, the space around may be "sterile"....How do u know,...

05 June 2017 1,064 2 View

How can dark matter stay in the galactic halo if its gravity is acting to pull it to the center?

Cosmologist are puzzled by the small value of the cosmological constant. Why don't they accept my non-singular model of the universe based on the back-reaction of quantum fields. 

05 June 2017 4,060 45 View

How do we describe the behavior of singularities formed from the gravitational collapse using Galilean rainbow gravity?

The cosmology has also been studied using Galileon gravity and this has been done by analyzing the linear perturbation in Galileon gravity. Furthermore, the low-density stars with slow rotation...

15 May 2017 3,698 2 View

Comparing Hubble calculated distances...with Pan Theory?

I wonder about the source of the formula at internet http://www.pantheory.org/HF.htm : [((z+1)2-1) / ((z+1)2+1)] c / H0 H0 – Hubble’s constant, c – speed of light. “Comparing Hubble calculated...

18 April 2017 9,234 35 View

Does 'Dark' energy imply infinite energy in our universe or 'beyond' it?

Reference link:  https://en.wikipedia.org/wiki/Dark_energy; 'Concordance Cosmology without Dark energy', https://arxiv.org/pdf/1607.08797.pdf.

11 April 2017 1,956 6 View

Does the space of the observed Universe rotate?

Professor Michael Longo (University of Michigan in Ann Arbor) and Professor Lior Shamir (Lawrence Technological University) on experimental data have shown that there is an asymmetry between the...

04 April 2017 7,378 47 View

What is s-wave, p-wave expansion in context with Boltzmann Equation?

The thermally averaged cross-section can be expanded as = a + bv^2+... where the first term corresponds to s-wave, second term corresponds to p-wave and so on. Why these terms are...

15 February 2017 6,944 3 View

Is there any public code can calculate the correlation function of BAO, from Lyman Alpha forest data of BOSS, SDSS?

We need to verify our theory model, BAO is a good tool. But we don't know how to calculate the correlation function. Is there any public code that can get the acoustic peak (~150Mpc) of BOSS's data ?

04 January 2017 8,280 2 View

Do photons really result in pressure in Friedman models of the universe?

One of the sources of spacetime curvature in Einstein's equations for Friedman models is pressure. In a "dust" universe, the dust is assumed to provide no pressure.  However, electromagnetic...

15 December 2016 4,533 11 View

What gives us the security to predict: matter can be compressed at dimensions equal to or smaller as the mathematical calculated Schwarzschild radius?

Maybe a very high mass star can itself compress to very high matter density.But what observations lead to the assumption, a smaller object could collapse at Schwarzschild dimension?I remind the...

25 November 2016 3,143 32 View

Which state of matter exists first in universe?

There is four state of matter exists in nature; solid, liquid, gas and plasma. The origin of everything is Big bang; I need to know which state of matter exists first in the universe.

10 November 2016 5,637 22 View

Which spectral lines do we get from far galaxies?

Do we get from the most distant galaxies mostly the spectral lines of heavy elements or of light elements? The thought behind my question is that on our time axis, the nuclear reactions on bodies...

29 October 2016 9,878 36 View

How many planets a given star can accommodate?

The atom is neutral and the number of electrons it accommodates depends on the total charge of the nucleus. Is there any gravitational law that gives the total number of planets that a given star...

21 October 2016 7,507 3 View

Why does microcosmic possess better symmetry than macroscopic?And how symmetry break(not EVEl) when the universe was born in a hot furnance?

I have thought some explanation about this problem.And I want some math formulation to adress it.For instance,spontaneous magnetization occur below  the Curie temperature,which is related...

01 October 2016 4,224 11 View

Can anyone point me to a succinct mathematical model of Big Bang theory?

Most of searches on Big bang Theory point to a publications of a similar nature as the Book of Genesis. I want the full list of equations initial conditions constrints all in one as it should be...

23 September 2016 3,336 30 View

How to estimate the initial entropy of the big bang?

assume that an isolated bubble fluctuates of the vacuum which is at temperature Tvac and has a negative constant pressure,          -Pvac = Λ > 0, the cosmological energy density which in...

19 September 2016 1,081 15 View

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