New resonance scattering model in AtomDB: application to line suppression in galaxy clusters and elliptical galaxies

Priyanka Chakraborty, Adam Foster, Randall Smith, Nancy Brickhouse, John Raymond

Published 2023-10-05Version 1

In this paper, we present a simple, one-step, self-consistent, and fast resonance scattering model rsapec based on the AtomDB database. This model can be used as an alternative to the commonly used APEC model for fitting such X-ray spectra with optically thick lines. The current model is intended, in general, for verifying the presence of the effect and for spectral modeling of galaxy clusters and elliptical galaxies under applicable assumptions. We test rsapec to derive the line suppression in the elliptical galaxy NGC 4636 and the Perseus cluster of galaxies and obtain resonance suppression of ~ 1.24 and ~ 1.30, respectively.