Jacob D. Bekenstein, Robert H. Sanders
Wojtak, Hansen and Hjorth have recently claimed to confirm general relativity
and to rule out the tensor-vector-scalar (TeVeS) gravitational theory based on
an analysis of the gravitational redshifts of galaxies in 7800 clusters. But
their ubiquitous modeling of the sources of cluster gravitational fields with
Navarro-Frenk-White mass profiles is neither empirically justified out to the
necessary radii in clusters, nor germane in the case of TeVeS. Using MONDian
isothermal sphere models consistently constructed within MOND (equivalent to
TeVeS models), we can fit the determined redshifts no worse than does general
relativity with dark halos. Wojtak, Hansen and Hjorth's work is further marred
by confusion between the primitive mu-function of TeVeS and the MOND
interpolation function.
View original:
http://arxiv.org/abs/1110.5048
No comments:
Post a Comment