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Blackbody as a function of energy.
Blackbody emission calculated as a function of energy using the expression:
f(E) = A (E^2/exp[E/kT]-1) ,
where E is the photon energy, and
kT is the
blackbody temperature (expressed in the same units as the photon energy).
The amplitude
A is related to the ratio of source radius to distance:
A = (2pi/[c^2 h^3]) (R/d)^2 = 9.884 x 10^31 (R/d)^2 ,
with Planck's constant h specified in keV-s and
the speed of light c specified in cm/s, and with
R and d representing the
radius of, and distance to, the source respectively. If E/kt < 10^-4, f(E) = AEkT, while if E/kT > 60, f(E) = 0.
bbody Parameters
| 1 |
space |
0: energy | 1: wavelength |
| 2 |
kT |
temperature kT (in energy units) |
| 3 |
ampl |
amplitude A |
- py.sherpa
-
atten,
bbodyfreq,
beta1d,
beta2d,
box1d,
box2d,
bpl1d,
const1d,
const2d,
cos,
delta1d,
delta2d,
dered,
devaucouleurs2d,
edge,
erf,
erfc,
exp,
exp10,
gauss1d,
gauss2d,
hubblereynolds,
jdpileup,
linebroad,
log,
log10,
lorentz1d,
lorentz2d,
models,
normbeta1d,
normgauss1d,
poisson,
polynom1d,
polynom2d,
powlaw1d,
psf1d,
psf2d,
schechter,
sin,
sqrt,
stephi1d,
steplo1d,
tablemodel,
tan,
xs,
xsabsori,
xsacisabs,
xsapec,
xsbapec,
xsbbody,
xsbbodyrad,
xsbexrav,
xsbexriv,
xsbkn2pow,
xsbknpower,
xsbmc,
xsbremss,
xsbvapec,
xsc6mekl,
xsc6pmekl,
xsc6pvmkl,
xsc6vmekl,
xscabs,
xscemekl,
xscevmkl,
xscflow,
xscompbb,
xscompls,
xscompps,
xscompst,
xscomptt,
xsconstant,
xscutoffpl,
xscyclabs,
xsdisk,
xsdiskbb,
xsdiskline,
xsdiskm,
xsdisko,
xsdiskpbb,
xsdiskpn,
xsdust,
xsedge,
xsequil,
xsexpabs,
xsexpdec,
xsexpfac,
xsezdiskbb,
xsgabs,
xsgaussian,
xsgnei,
xsgrad,
xsgrbm,
xshighecut,
xshrefl,
xskerrbb,
xskerrd,
xslaor,
xslaor2,
xslorentz,
xsmeka,
xsmekal,
xsmkcflow,
xsnei,
xsnotch,
xsnpshock,
xsnsa,
xsnsagrav,
xsnsatmos,
xsnteea,
xspcfabs,
xspegpwrlw,
xspexrav,
xspexriv,
xsphabs,
xsplabs,
xsplcabs,
xsposm,
xspowerlaw,
xspshock,
xspwab,
xsraymond,
xsredden,
xsredge,
xsrefsch,
xssedov,
xssmedge,
xsspline,
xssrcut,
xssresc,
xssss_ice,
xsstep,
xstbabs,
xstbgrain,
xstbvarabs,
xsuvred,
xsvapec,
xsvarabs,
xsvbremss,
xsvequil,
xsvgnei,
xsvmcflow,
xsvmeka,
xsvmekal,
xsvnei,
xsvnpshock,
xsvphabs,
xsvpshock,
xsvraymond,
xsvsedov,
xswabs,
xswndabs,
xsxion,
xszbbody,
xszbremss,
xszdust,
xszedge,
xszgauss,
xszhighect,
xszpcfabs,
xszphabs,
xszpowerlw,
xszredden,
xszsmdust,
xsztbabs,
xszvarabs,
xszvfeabs,
xszvphabs,
xszwabs,
xszwndabs
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