Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.386..211c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 386, Issue 1, pp. 211-229.
Astronomy and Astrophysics
Astronomy
8
Methods: Statistical, Intergalactic Medium, Quasars: Absorption Lines, Large-Scale Structure Of Universe
Scientific paper
We investigate how well the three-dimensional density field of neutral hydrogen in the intergalactic medium (IGM) can be reconstructed using the Lyman α absorptions observed along lines-of-sight to quasars separated by arcmin distances in projection on the sky. We use cosmological hydrodynamical simulations to compare the topologies of different fields: dark matter, gas and neutral hydrogen optical depth and to investigate how well the topology of the IGM can be recovered from the Wiener interpolation method implemented by Pichon et al. The global statistical and topological properties of the recovered field are analysed quantitatively through the power spectrum, the probability distribution function (PDF), the Euler characteristics, its associated critical point counts and the filling factor of underdense regions. The local geometrical properties of the field are analysed using the local skeleton by defining the concept of interskeleton distance.
As a consequence of the nearly lognormal nature of the density distribution at the scales under consideration, the tomography is best carried out on the logarithm of the density rather than the density itself. At scales larger than ~1.4
Caucci Sara
Colombi Stephane
Petitjean Patrick
Pichon Christophe
Rollinde Emmanuel
No associations
LandOfFree
Recovering the topology of the intergalactic medium at z ~ 2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Recovering the topology of the intergalactic medium at z ~ 2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovering the topology of the intergalactic medium at z ~ 2 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1067940