bexriv: reflected e-folded broken power law, ionized medium
A broken power-law spectrum multiplied by exponential high-energy
cutoff, exp(-E/Ec), and reflected from ionized material. See Magdziarz
& Zdziarski (1995)
for details.
The output spectrum is the sum of an e-folded broken power law and the
reflection component. The reflection component alone can be obtained
for
. Then the actual reflection normalization is
. Note that you need to change then the limits of
excluding zero (as then the direct component
appears). If , there is no cutoff in the power law. The metal
and iron abundance are variable with respect to those set by the
command abund.
The core of this model is a Greens' function integration with one
numerical integral performed for each model energy. The numerical
integration is done using an adaptive method which continues until
a given estimated fractional precision is reached. The precision can
be changed by setting BEXRIV_PRECISION eg xset BEXRIV_PRECISION 0.05. The default precision is 0.01 (ie 1%).
par1 |
, first power law photon index |
par2 |
, break energy (keV) |
par3 |
, second power law photon index |
par4 |
, the e-folding energy in keV (if there is no
cutoff) |
par5 |
, reflection scaling factor (1 for isotropic source
above disk) |
par6 |
, redshift |
par7 |
abundance of elements heavier than He relative to the solar
abundances |
par8 |
iron abundance relative to the above |
par9 |
cosine of inclination angle |
par10 |
disk temperature (K) |
par11 |
disk ionization parameter,
, where
is the 5eV–20keV irradiating flux and is the density of
the reflector; see Done et al. (1992). |
norm |
photon flux at 1 keV of the cutoff broken power-law only (no
reflection) in the observed frame. |
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Last modified: Friday, 23-Aug-2024 13:20:40 EDT
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