SCORCH. II. Radiation-hydrodynamic Simulations of Reionization with Varying Radiation Escape Fractions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Astrophys.J. Année : 2019

SCORCH. II. Radiation-hydrodynamic Simulations of Reionization with Varying Radiation Escape Fractions

Hy Trac
  • Fonction : Auteur
Renyue Cen

Résumé

In the Simulations and Constructions of the Reionization of Cosmic Hydrogen project, we present new radiation-hydrodynamic simulations with updated high-redshift galaxy populations and varying radiation escape fractions. The simulations are designed to have fixed Thomson optical depth τ ≈ 0.06, consistent with recent Planck observations, and similar midpoints of reionization 7.5 ≲ z ≲ 8.0, but with different ionization histories. The galaxy luminosity functions and ionizing photon production rates in our model are in good agreement with recent HST observations. Adopting a power-law form for the radiation escape fraction , we simulate the cases for a 8 = 0, 1, and 2 and find a 8 ≲ 2 in order to end reionization in the range of 5.5 ≲ z ≲ 6.5 to be consistent with Lyα forest observations. At fixed τ and as the power-law slope a 8 increases, the reionization process starts earlier but ends later with a longer duration Δz and the decreased redshift asymmetry Az. We find a range of durations 3.9 ≲ Δz ≲ 4.6 that is currently in tension with the upper limit Δz < 2.8 inferred from a recent joint analysis of Planck and South Pole Telescope observations.

Dates et versions

hal-01974887 , version 1 (09-01-2019)

Identifiants

Citer

Aristide Doussot, Hy Trac, Renyue Cen. SCORCH. II. Radiation-hydrodynamic Simulations of Reionization with Varying Radiation Escape Fractions. Astrophys.J., 2019, 870 (1), pp.18. ⟨10.3847/1538-4357/aaef75⟩. ⟨hal-01974887⟩
134 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More