5 papers
Emulation of non-linear 1D spectral models: relativistic X-ray reflection
Benjamin J. Ricketts, Tin Hadži VeljkoviÄ, Daniela Huppenkothen +4
The use of machine learning techniques to approximate computationally expensive models has become increasingly prevalent in a wide variety of fields within astronomy. We discuss th…
Blueshifted lines from the inner accretion disc's rotation can explain quasar absorption "forests''
Amelia M. Hankla, Fergus J. E. Baker, Daniel R. Wilkins +1
Recent XRISM observations of active galactic nuclei such as PDS 456 have revealed ``forests'' of absorption lines best modeled by five distinct absorption zones with varying large…
Modeling reflection spectra of super-Eddington X-ray sources
Swarnim Shashank, Askar B. Abdikamalov, Honghui Liu +5
Relativistic reflection is a common feature in the X-ray observations of accreting compact objects. We present reflux, a new X-ray reflection model for spectral analysis of super-E…
Relativistic reflection within an extended hot plasma geometry
Alexey D. Nekrasov, Thomas Dauser, Javier A. Garcia +9
The reflection of X-rays at the inner accretion disk around black holes imprints relativistically broadened features in the observed spectrum. Aside from the black hole properties…
Gradus.jl: spacetime-agnostic general relativistic ray-tracing for X-ray spectral modelling
Fergus J. E. Baker, Andrew J. Young
We introduce Gradus.jl, an open-source and publicly available general relativistic ray-tracing toolkit for spectral modelling in arbitrary spacetimes. Our software is written in th…