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Kilonova ejecta opacity inferred from new large-scale HFR atomic calculations in all elements between Ca (Z = 20) and Lr (Z = 103)
Jérôme Deprince, Gururaj Wagle, Sirine Ben Nasr +7
In the context of kilonova (KN) modeling, the present work focusses on large-scale atomic data and opacity computations for all heavy elements from Ca to Lr, with a special effort…
Opacities of Singly and Doubly Ionised Neodymium and Uranium for Kilonova Emission Modeling
A. Flörs, R. F. Silva, J. Deprince +10
Even though the electromagnetic counterpart AT2017gfo to the binary neutron star merger GW170817 is powered by the radioactive decay of r-process nuclei, only few tentative identif…
Photoionization Models for High Density Gas
T. Kallman, M. Bautista, J. Deprince +5
Relativistically broadened and redshifted 6.4 -- 6.9 keV iron K lines are observed from many accretion powered objects, including X-ray binaries and active galactic nuclei (AGN). E…
The Problem of the High Iron Abundance in Accretion Disks around Black Holes
J. A. García, T. R. Kallman, M. Bautista +4
In most accreting black-hole systems the copious X-rays commonly observed from the inner-most regions are accompanied by a reflection spectrum. The latter is the signature of energ…
Photoionization modeling of oxygen K absorption in the interstellar medium:the Chandra grating spectra of XTE J1817-330
E. Gatuzz, J. García, C. Mendoza +6
We present detailed analyses of oxygen K absorption in the interstellar medium (ISM) using four high-resolution Chandra spectra towards the X-ray low-mass binary XTE J1817-330. The…
K-shell photoionization of Nickel ions using R-matrix
M. C. Witthoeft, M. A. Bautista, J. Garcia +4
We present R-matrix calculations of photoabsorption and photoionization cross sections across the K edge of the Li-like to Ca-like ions stages of Ni. Level-resolved, Breit-Pauli ca…