[Cosmo-torun] cosmo workshop Fri 2 March @15.00 @KRA: Jan Ostrowski on Cactus: numerical relativity
faithlesstomas w gmail.com
Śro, 29 Lut 2012, 23:37:40 CET
Could we start a little bit ealier,
for example @14:00?
I have "dyżur" at control room starting at 16:00.
2012/2/29 Boud Roukema <boud w astro.uni.torun.pl>
> hi cosmo-torun
> Cactus: numerical relativity
> cosmo workshop Fri 2 March @15.00 @KRA
> Jan Ostrowski
> Jan is doing very interesting work in finding out how to do numerical
> relativity. One way of saying it is the following:
> "Normal" cosmological N-body simulations consist of *Newtonian*
> gravity simulated on a highly simplified (perfectly homogeneous)
> relativistic "background". In formal scientific language, this is
> called a "heuristic" approach; in informal language, it's called "a
> fudge" - it's a mathematical shortcut that seems like it should work
> and lets us quickly compare some sort of "model" to observations
> instead of waiting 50 years for the mathematics to be solved. In
> principle, every scientist using the heuristic/fudge is aware of
> this. Pure theory is very difficult to apply to the real world.
> Relativistic cosmological simulations should be "directly"
> relativistic, consistent with the Einstein equations, without using
> the heuristic/fudge of adding "perturbations" that obey Newtonian
> gravity to a relativistic "background". So these simulations can be called
> How can we do background-free cosmology simulations?
> Jan will present a discussion on this.
> Cosmo-torun mailing list
> Cosmo-torun w cosmo.torun.pl
-------------- następna część ---------
Załącznik HTML został usunięty...
Więcej informacji o liście Cosmo-torun