Tagged Questions
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votes
0answers
36 views
Vlasov equation in Liddle and Lyth or Dodelson's book
I am concerned about equations 2, 5 and 6 on page 2 of arXiv:astro-ph/0606028.
The paper refers them to the book by Peebles which I don't have access to at this point.
I believe that these ...
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0answers
25 views
Reference for stellar figures
Could anybody suggest a reference for the present stellar models? In particular, I would appreciate references containing the core temperatures and pressures of neutron stars...
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0answers
61 views
Reference request: FLRW with k>0, dust, and positive cosmological constant
The exact solution representing a FLRW universe with $k>0$ and dust (p=0), and $\Lambda=0$, is described by a cycloid. What is the exact solution for dust, in the presence of a positive ...
2
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1answer
101 views
Reference request for low entropy big bang
There is a somewhat widely accepted argument that the second law of thermodynamics exists because the universe began in a low-entropy state. I'm writing a paper that mentions this (and must be ...
1
vote
2answers
72 views
$\Omega_{r}$ from WMAP results?
To do some Friedmann-Lemaître cosmology calculations, I would like to know an estimation of $\Omega_{r_0}$ ($\Omega$ radiation today). WMAP 7 give estimation of $\Omega_{b}$, $\Omega_{c}$ and ...
4
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0answers
34 views
Status of large-scale structure formation within cosmology today
Since the CMB results of the past decade, would it be fair to say that the consensus among cosmologists is that cosmic strings are no longer considered as a (major) source for density perturbations?
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2
votes
1answer
1k views
What did Hawking mean? 'Time started at the big bang'. Book suggestions please [closed]
After writing down this question, I have come to realize that. What I really want is reading materials on the questions below.
Before the big bang there was no such thing as 'time' (Steven Hawking on ...
4
votes
1answer
390 views
When will the Hubble volume coincide with the volume of the observable Universe?
The Hubble volume is the volume that corresponds to objects so far from the Earth that the space between us and them is expanding faster than the speed of light. (I.e. objects outside this volume ...
