Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-03
Astronomy and Astrophysics
Astrophysics
Elsart Latex file, 24 pages, 11 figures included, accepted for publication in New Astronomy
Scientific paper
10.1016/j.newast.2007.06.002
We investigate the volume growth of ionized regions around UV photon sources with the WENO algorithm, which is an effective solver of photon kinetics in the phase space described by the radiative transfer equation. We show that the volume growth rate, either of isolated ionized regions or of clustered regions in merging, generally consists of three phases: fast or relativistic growth phase at the early stage, slow growth phase at the later stage, and a transition phase between the fast and slow phases. We also show that the volume growth of ionized regions around clustered sources with intensity $\dot{E}_i$ ($i=1, 2, ...$) would have the same behavior as a single source with intensity $\dot{E}=\sum_i\dot{E}_i$, if all the distances between nearest neighbor sources $i$ and $j$ are smaller than $c(t^i_c+t^j_c)$, $t^i_c$ being the time scale $t_c$ of source $i$. Therefore, a tightly clustered UV photon sources would lead to a slow growth of ionized volume. This effect would be important for studying the redshift-dependence of 21cm signals from the reionization epoch.
Fang Li-zhi
Liu Ji-Ren
Qiu Jing-Mei
Shu Chi-Wang
No associations
LandOfFree
A WENO Algorithm for the Growth of Ionized Regions at the Reionization Epoch 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 A WENO Algorithm for the Growth of Ionized Regions at the Reionization Epoch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A WENO Algorithm for the Growth of Ionized Regions at the Reionization Epoch will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-689130