Speaker
Alan Rendall
(AEI Golm)
Description
For about the last ten years cosmic acceleration has been a subject of
wide interest in cosmology. By now there are a number of interesting
mathematical results in this area. A closer examination reveals that
while the mathematical theorems are often of greater generality than
what is considered in the astrophysical literature there are topics of
astrophysical interest which fail to be addressed at all by the
mathematical developments up to now. This talk will discuss
possibilities of improving the interface between the two subjects in
this context, concentrating on the case of the massive scalar field as
a source for the Einstein equations. Other aspects of the question
will be illuminated by consideration of a modification of the Einstein
equations given by Cardassian models, following work of Nikolaus
Berndt.
