The discussion centers on the interpretation of cosmological redshift, specifically whether it should be viewed solely as a kinematic (relativistic) Doppler effect or as a consequence of the time dynamics of metric space. It is established that for distant astronomical objects, the curvature of space-time must be considered to accurately determine redshift. Conversely, for nearer objects, the relativistic Doppler effect suffices. However, at distances approaching a Hubble radius, neglecting space-time curvature leads to incorrect conclusions.
PREREQUISITESAstronomers, physicists, and students of cosmology seeking to deepen their understanding of redshift phenomena and the implications of space-time dynamics in the universe.
There's no question that for distant objects, one has to take into account the curvature of space-time to get the right answer for the redshift. For nearer objects, this just reduces to a relativistic doppler effect. When you start getting out to around a Hubble radius, however, this starts to become rather wrong and you have to take into account the space-time curvature.AWA said:In several threads where I've seen the redshift issue discussed there's been some confusion about this point, Must we treat cosmological redshift as a purely kinematic (relativistic)doppler effect or as the time dymamics of the metric space? Or both views can be made to converge?