23 citations · 71 across the 6 of their papers we have counts for
6 papers
Effect of Dust on Lyman-alpha Photon Transfer in Optically Thick Halo
Yang Yang, Ishani Roy, Chi-Wang Shu +1
We investigate the effects of dust on Lyα photons emergent from an optically thick medium by solving the integro-differential equation of the radiative transfer of resonant photons…
Resonant Scattering and Ly-alpha Radiation Emergent from Neutral Hydrogen Halos
Ishani Roy, Chi-Wang Shu, Li-Zhi Fang
With a state-of-the-art numerical method for solving the integral-differential equation of radiative transfer, we investigate the flux of the Ly photon emergent from an op…
Wouthuysen-Field Coupling in the 21 cm Region Around High Redshift Sources
I. Roy, W. Xu, J. M. Qiu +2
The 21 cm emission and absorption from gaseous halos around the first generation of star depend on the Wouthuysen-Field (W-F) coupling, which relates the spin temperature with the…
A WENO algorithm for radiative transfer with resonant scattering: the time scale of the Wouthuysen-Field Coupling
Ishani Roy, Jing-Mei Qiu, Chi-Wang Shu +1
We develop a numerical solver for the integral-differential equations, which describes the radiative transfer of photon distribution in the frequency space with resonant scattering…
Time evolution of Wouthuysen-Field coupling
I. Roy, W. Xu, J. -M. Qiu +2
We study the Wouthuysen-Field coupling at early universe with numerical solutions of the integrodifferential equation describing the kinetics of photons undergoing resonant scatter…
Comparative Study of Different Discretizations of the Model
Ishani Roy, Sergey V. Dmitriev, Panayotis G. Kevrekidis +1
We examine various recently proposed discretizations of the well-known field theory. We compare and contrast the properties of their fundamental solutions including the natur…