Two-dimensional Topology of Cosmological Reionization
Abstract
We study the two-dimensional topology of the 21-cm differential brightness temperature for two hydrodynamic radiative transfer simulations and two semi-numerical models. In each model, we calculate the two-dimensional genus curve for the early, middle, and late epochs of reionization. It is found that the genus curve depends strongly on the ionized fraction of hydrogen in each model. The genus curves are significantly different for different reionization scenarios even when the ionized faction is the same. We find that the two-dimensional topology analysis method is a useful tool to constrain the reionization models. Our method can be applied to the future observations such as those of the Square Kilometre Array.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 2015
- DOI:
- 10.1088/0004-637X/814/1/6
- arXiv:
- arXiv:1510.01404
- Bibcode:
- 2015ApJ...814....6W
- Keywords:
-
- cosmology: theory;
- large-scale structure of universe;
- methods: numerical;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 11 pages, 7 figures, 1 table, Accepted for publication in ApJ