Recent content by petmal

Well, I want to get C_{l}, right? That is why I apply P_{l} on the correlation function (1) and integrate - it removes P_{l} and the sum leaving C_{l} * some factor in l. Where do you see a mistake? Thanks.

Hello. I don't know what to do with one integral. I am sure it is something very simple, but I just don't see it... For some reason I am not able to post the equations, so I am attaching them as a separatre file. Many thanks for help.

Hi all. I have been applying for graduate (research) studies in Astrophysics (I am interested in cosmology - CMB, SNIa, models...) at some UK universities - Imperial College, Durham, Glasgow, Manchester. All of them have research groups in the field of cosmology. So far I have received an...

Thanks a lot, you opened my eyes... For some reason I didn't see the simple solution of plotting it as a parametric equation where x = t[\Theta] and y = R[\Theta]... I was probably expecting something more complicated...

I doubt the result could be solved explicitly for R... Right now I've got three books in Astrophysics/Cosmology here, every of them provides the parametric solutions (above) and clearly explains how to get the age of the universe from it (expressing parameters in terms of...

Thanks, you confirmed what I was thinking about. I guess this is what I don't know to do so I need R in terms of t... :blushing:

Simply, say, I want to make a plot of evolution of the scale factor R vs. t. Such plots are probably in every book which has something to do with cosmology. To do this I need R as a function of t, unfortunatelly have no idea how to get it. When k = 0, it's a simple differential equation...

Hello everybody, could somebody tell me how to get the scale factor as a function of time [R(t)] from the Friedmann Equations for a simple dust, pressureless universe when k != 0, \Lambda = 0. Mathematica 5.2 doesn't want to give me any solution and wherever I searched the best thing I got...

Mistake in the equation It is probably too late, but I am quite sure that the equation should look like this: ]S=Nk\left[ \ln \left(\frac{A}{N}\right) + \ln \left(\frac{2\pi mU}{\hbar^2 N}\right) +2\right]