X-RAY REFLECTED SPECTRA FROM ACCRETION DISK MODELS. III. A COMPLETE GRID OF IONIZED REFLECTION CALCULATIONS

Abstract

We present a new and complete library of synthetic spectra for modeling the\ncomponent of emission that is reflected from an illuminated accretion disk. The\nspectra were computed using an updated version of our code XILLVER that\nincorporates new routines and a richer atomic data base. We offer in the form\nof a table model an extensive grid of reflection models that cover a wide range\nof parameters. Each individual model is characterized by the photon index\n\\Gamma of the illuminating radiation, the ionization parameter \\xi at the\nsurface of the disk (i.e., the ratio of the X-ray flux to the gas density), and\nthe iron abundance A_{Fe} relative to the solar value. The ranges of the\nparameters covered are: 1.2 \\leq \\Gamma \\leq 3.4, 1 \\leq \\xi \\leq 10^4, and 0.5\n\\leq A_{Fe} \\leq 10. These ranges capture the physical conditions typically\ninferred from observations of active galactic nuclei, and also stellar-mass\nblack holes in the hard state. This library is intended for use when the\nthermal disk flux is faint compared to the incident power-law flux. The models\nare expected to provide an accurate description of the Fe K emission line,\nwhich is the crucial spectral feature used to measure black hole spin. A total\nof 720 reflection spectra are provided in a single FITS\nfile{\\url{http://hea-www.cfa.harvard.edu/~javier/xillver/}} suitable for the\nanalysis of X-ray observations via the atable model in XSPEC. Detailed\ncomparisons with previous reflection models illustrate the improvements\nincorporated in this version of XILLVER.\n