Properties of Cosmological Filaments extracted from Eulerian Simulations
  Using a new parallel algorithm implemented within the VisIt framework, we
analysed large cosmological grid simulations to study the properties of baryons
in filaments. The procedure allows us to build large catalogues with up to
$\sim 3 \cdot 10^4$ filaments per simulated volume and to investigate the
properties of cosmic filaments for very large volumes at high resolution (up to
$300^3 ~\rm Mpc^3$ simulated with $2048^3$ cells). We determined scaling
relations for the mass, volume, length and temperature of filaments and
compared them to those of galaxy clusters. The longest filaments have a total
length of about $200 ~\rm Mpc$ with a mass of several $10^{15} M_{\odot}$. We
also investigated the effects of different gas physics. Radiative cooling
significantly modifies the thermal properties of the warm-hot-intergalactic
medium of filaments, mainly by lowering their mean temperature via line
cooling. On the other hand, powerful feedback from active galactic nuclei in
surrounding halos can heat up the gas in filaments. The impact of
shock-accelerated cosmic rays from diffusive shock acceleration on filaments is
small and the ratio of between cosmic ray and gas pressure within filaments is
of the order of $\sim 10-20$ percent.
