- #1
Dukon
- 73
- 3
consider two concentric spheres, where inner radius is r and outer radius is r+delta. Assume space between the two spheres is mass of an amount to be solved for. Given the metric inside the sphere, assumed to be varying as implied by the Cosmic Background Radiation anisotropy (CBRa), can the mass and thickness of the annular sphere be deduced?
Now if it can, then use the varying metric for our universe g_mu_nu, assume it is anisotropic as implied by the CBRa, and set r=13.7B light years. Calculate M and delta.
Can this be done or does this just make no sense? asks an experimental particle physicist who just does not know GR :)
in other words, can the real world metric (g_mu_nu?) that exists in our universe imply a particular spherical mass shell external to the universe, and if so what's the mass and effective if not real thickness?
As an outsider to GR, I do not know the connection between the recently measured Cosmic Background Radiation anisotropy (CBRa) and g_mu_nu in GR. What I mean by saying above "Given the metric inside the sphere" I am assuming that the CBRa implies a varying g_mu_nu metric but maybe this is wrong. I am seeking GR experts to educate me on the relation between the CBRa and g_mu_nu. If there isn't one I apologize that my ignorance on this topic makes the question nonsensical
Now if it can, then use the varying metric for our universe g_mu_nu, assume it is anisotropic as implied by the CBRa, and set r=13.7B light years. Calculate M and delta.
Can this be done or does this just make no sense? asks an experimental particle physicist who just does not know GR :)
in other words, can the real world metric (g_mu_nu?) that exists in our universe imply a particular spherical mass shell external to the universe, and if so what's the mass and effective if not real thickness?
As an outsider to GR, I do not know the connection between the recently measured Cosmic Background Radiation anisotropy (CBRa) and g_mu_nu in GR. What I mean by saying above "Given the metric inside the sphere" I am assuming that the CBRa implies a varying g_mu_nu metric but maybe this is wrong. I am seeking GR experts to educate me on the relation between the CBRa and g_mu_nu. If there isn't one I apologize that my ignorance on this topic makes the question nonsensical