next up previous contents
Next: c6vmekl Up: XSPEC V10 Models Previous: c6pmekl

c6pvmkl

A multi-temperature, variable abundance mekal model using the exponential of a sixth order Chebyshev polynomial for the differential emission measure (eg Lemen etal. ApJ 341, 474, 1989). The abundances are relative to the Solar abundances set by the abund command. The switch parameter determines whether the mekal code will be run to calculate the model spectrum for each temperature or whether the model spectrum will be interpolated from a pre-calculated table. The former is slower but more accurate.

par1	   = 	 Chebyshev polynomial coefficient 1

par2 = Chebyshev polynomial coefficient 2

par3 = Chebyshev polynomial coefficient 3

par4 = Chebyshev polynomial coefficient 4

par5 = Chebyshev polynomial coefficient 5

par6 = Chebyshev polynomial coefficient 6

par7 = H density (cm tex2html_wrap_inline12829 )

par8-par21 = Abundances of He, C, N, O, Ne, Na, Mg, Al, Si, S,

Ar, Ca, Fe, Ni wrt Solar (defined by the abund command)

par22 = Redshift

par23 = 0 tex2html_wrap_inline12669 calculate, 1 tex2html_wrap_inline12669 interpolate

K = tex2html_wrap_inline12487 , where D is the luminosity distance

to the source (cm), tex2html_wrap_inline12825 is the electron density (cm tex2html_wrap_inline12829 ),

and tex2html_wrap_inline12661 is the hydrogen density (cm tex2html_wrap_inline12829 )



Keith Arnaud (kaa@genji.gsfc.nasa.gov)
Wed May 28 10:59:33 EDT 1997