Origin of the Universe,,,,Bang or no Bang

[Michaelangelica]

Originally Posted by Buffy

For fun I picked this one:

In summary, it basically provides a simple appeal to the well-accepted notion that the speed of light slows down when passing through a medium without bothering to try to even compute the necessary density of that medium were the tired light theories to be adequate explanations of red shift.

Buffy

You have TOTALLY done my head in Buffy

Anyone for a game of checkers?

[Pluto]

G'day Michaelangelica

Your move.

[Pluto]

G'day from the land of ozzzzzzz

I was going to start a new thread under Galaxy Formation and Evolution and tha I thought maybe this link would fit into this thread.

I cannot stop reading papers, is it a sickness.

I might take my wife out instead.

This link is interesting,

[0811.1688] Effect of Central Mass Concentration on the Formation of Nuclear Spirals in Barred Galaxies
Effect of Central Mass Concentration on the Formation of Nuclear Spirals in Barred Galaxies

Authors: Parijat Thakur, H.B. Ann, Ing-Guey Jiang
(Submitted on 11 Nov 2008)

Abstract: We have performed smoothed particle hydrodynamics (SPH) simulations to study the response of the central kiloparsec region of a gaseous disk to the imposition of nonaxisymmetric bar potentials. The model galaxies are composed of the three axisymmetric components (halo, disk, and bulge) and a non-axisymmetric bar. These components are assumed to be invariant in time in the frame corotating with the bar. The potential of spherical $\gamma$-models of Dehnen is adopted for the bulge component whose density varies as $r^{-\gamma}$ near the center and $r^{-4}$ at larger radiiand hence, possesses a central density core for $\gamma = 0$ and cusps for $\gamma > 0$. Since the central mass concentration of the model galaxies increases with the cusp parameter $\gamma$, we have examined here the effect of the central mass concentration by varying the cusp parameter $\gamma$ on the mechanism responsible for the formation of the symmetric two-armed nuclear spirals in barred galaxies. Our simulations show that the symmetric two-armed nuclear spirals are formed by hydrodynamic spiral shocks driven by the gravitational torque of the bar for the models with $\gamma = 0$ and 0.5. On the other hand, the symmetric two-armed nuclear spirals in the models with $\gamma=1$ and 1.5 are explained by gas density waves. Thus, we conclude that the mechanism responsible for the formation of the symmetric two-armed nuclear spirals in barred galaxies changes from the hydrodynamic shocks to the gas density waves when the central mass concentration increases from $\gamma = 0$ to 1.5.

[Buffy]

Originally Posted by Pluto

I cannot stop reading papers, is it a sickness.

I might take my wife out instead.

Oh I don't think it's a sickness at all.

But I *would* recommend taking your wife out instead!

Women love us for our defects. If we have enough of them, they will forgive us everything, even our intellects,
Buffy

[Pluto]

G'day Buffy

Are you a girl or a boy?

You said

Women love us for our defects. If we have enough of them, they will forgive us everything, even our intellects,

[Buffy]

Originally Posted by Pluto

Are you a girl or a boy?

Geez, it's not obvious? And a boy named Buffy? Gosh that would be downright cruel of my parents, wouldn't it!

Nope, in spite of misundertaking my sign off on that post, I'm all girl:

Originally Posted by Pluto

You said

No I didn't say that: it has Buffy's Asterisk on it. Click the link and read up on the meaning of when I use it... It requires looking stuff up on the Internet, but that's good for you!

My daddy left home when I was three, and he didn't leave much to ma and me, just this old guitar and an empty bottle of booze,
Buffy

[Pluto]

G'day Buffy

Sorry mate, I'm only a male, unable to think on two things at the same time.

============

I worked all day

I'm off to bed, to sleep, to dream

[REASON]

Originally Posted by Buffy

I'm all girl:

I'll say!

[Pluto]

G'day from the land of ozzzzz


Hello Reason, by that reasoning I would say that you are a boy.

Buffy you poor child, your daddy left you when you were 3 yrs old.

Reading on, its just amazing the work carried on by many scientists.

Quantum Condensates in Extreme Gravity:. Implications for Cold Stars and Dark Matter
00 2008
Quantum Condensates in Extreme Gravity:. Implications for Cold Stars and Dark Ma

Stable end-point stars currently fall into two distinct classes — white dwarfs and neutron stars — differing enormously in central density and radial size. No stable cold dead stars are thought to span the intervening densities or have masses beyond ~2-3 solar masses. I show, however, that the general-relativistic condition of hydrostatic equilibrium augmented by the equation of state of a neutron condensate at 0 K generates stable sequences of cold stars that span the density gap and can have masses well beyond prevailing limits. The radial sizes and mass limit of each sequence are determined by the mass and scattering length of the composite bosons. Solutions for hypothetical bosons of ultrasmall mass and large scattering length yield huge self-gravitating systems of low density, resembling galactic dark matter halos.

[Buffy]

Originally Posted by Pluto

Buffy you poor child, your daddy left you when you were 3 yrs old.

I guess we now know to try to avoid any levels of indirection in these discussions...

Originally Posted by Pluto

Reading on, its just amazing the work carried on by many scientists.

Quantum Condensates in Extreme Gravity:. Implications for Cold Stars and Dark Matter

So Pluto: what did you find interesting in this article? Why do you think it is relevant to BBT?

That would be a good thing for them to cut on my tombstone: Wherever she went, including here, it was against her better judgment,
Buffy