Critical Thoughts on Cosmology

Details Critical Thoughts on Cosmology Critical Thoughts on Cosmology

2009-02-18

arxiv.org/abs/0902.3151v1

AIP Conf.Proc.1132:288-302,2009

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

15 pages, 6 figures

Scientific paper

10.1063/1.3151843

An overview is given in section 1, of uncertain building blocks of present-day cosmologies. Thereafter, these edited lecture notes deal with the following four special problems: (1) They advertise Wiltshire's result -- making `dark energy' obsolete -- that accelerated cosmic expansion may be an artefact, due to an incorrect evaluation of the cosmic timescale in a Universe whose bulk matter is inhomogeneously distributed. (2) They cast doubt on Hawking's prediction of black-hole evaporation. (3) They point at various inconsistencies of the black-hole paradigm, in favour of nuclear-burning central engines of AGN. (4) They re-interpret (a best case of) `anomalous redshifts' as non-cosmological, kinematic redshifts in strong jet sources.

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