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Astrophysics of Gaseous Nebulae and Active Galactic Nuclei
Preface Preface to First Edition General Introduction Photoionization Equilibrium Thermal Equilibrium Calculation of Emitted Spectrum Comparison of Theory with Observations Internal Dynamics of
CLOUDY 90: Numerical Simulation of Plasmas and Their Spectra
ABSTRACT CLOUDY is a large‐scale spectral synthesis code designed to simulate fully physical conditions within an astronomical plasma and then predict the emitted spectrum. Here we describe version
Hazy, A Brief Introduction to Cloudy 96
Atomic data for astrophysics. II. New analytic fits for photoionization cross sections of atoms and ions
We present a complete set of analytic fits to the nonrelativistic photoionization cross sections for the ground states of atoms and ions of elements from H through Si, and S, Ar, Ca, and Fe. Near the
This is a summary of the 2013 release of the plasma simulation code Cloudy. Cloudy models the ionization, chemical, and thermal state of material that may be exposed to an external radiation field or
The 2017 release of CLOUDY
We describe the 2017 release of the spectral synthesis code Cloudy , summa- rizing the many improvements to the scope and accuracy of the physics which have been made since the previous release.
Atomic data for astrophysics. I. Radiative recombination rates for H-like, He-like, Li-like, and Na-like ions over a broad range of temperature
We present new calculations and analytic fits to the rates of radiative recombination toward H-like, He-like, Li-like, and Na-like ions of all elements from H through Zn ({ital Z}=30). The fits are
Physical conditions in the Orion Nebula and an assessment of its helium abundance
New long-slit spectrophotometric observations were obtained to redetermine the helium abundance of the Orion Nebula. The ionic ratio He(+)/H(+) is found to remain nearly constant at 0.088 {plus