VIA lecture M. Lopez-Corredoira "Tests for the Expansion of the Universe" was give on 15.05.2015.
It's record is in the VIA library
http://viavca.in2p3.fr/martin_lopez.html
The following questions and comments were made during it:
hantanu: Note that last year South Pole Telescope (SPT) and Planck collaborations published a robust result on T(z) vs 1+z using Sunayev-Zeldovich effect. Isn't this a more robust test? Or do you dispute these results?
Shantanu: Is there an updated plot like this with cD galaxies and radiogalaxies? Or is the 1986 paper the latest observation al paper?
Roy Keys: Do you consider the criticisms of SNIa evidence by Van Flandern and Jensen to be valid?
Alessandro Spallicci: Question 1. SN models are very uncertain for gravitational wave emission. Can they be trusted for expansion?
Shantanu: Alessandro: The SN used for cosmological tests are Type 1 a SN, and only Type II SN give gravitational waves
Shantanu: Are you talking about the Etherington relation, which is Luminosty distance = angular distance * (1+z)^2?
Roy Keys: It has been proposed that there are two 1+z factors in static model, i.e., one for photon energy reduction and another for flux reduction.
Shantanu: Then I disagree slightly. There are many papers which claim that this relation is very well satisfied, one paper is http://arxiv.org/abs/1201.2378
This paper also uses S-Z effect.
Shantanu: T(Z) from SPT paper is arxiv:1312.2462, again its going to be very hard to explain this using static models.
Shantanu: another question obviously is structure formation. Can statistic models explain CMB and LSS data on growth of structure.
Shantanu: Ok, I see. anyhow this interpretation has been criticized by Ned Wright, by Narlikar et al.
Alessandro Spallicci: 1. Tired light doesn't imply a static universe. necessarily.
Roy Keys: Re blackbody, see paper by Pecker, Narlikar et al. published this year.
Alessandro Spallicci: 2. Are the test valid if both extreme models are allowed?
Tired light could be complementary to the expansion.
Alessandro Spallicci: I am working on mechanisms for TL. Astrophysical tests should be put in a format for theorists.
Roy Keys: <>
tohttp://www.raa-journal.org/raa/index.php/raa/article/view/1545 be reproduced in memorial volume for Halton Arp.
Roy Keys: I discussed Z-D results from Planck with Pecker personally and he feels it is in agreement with the findings in their paper (S-Z).
You are welcome to continue the discussion