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c6mekl, c6vmekl, c6pmekl, c6pvmkl: differential emission measure using Chebyshev representations with multi-temperature mekal

c6mekl is a multi-temperature mekal model using sixth-order Chebyshev polynomial for the differential emission measure. The DEM is not constrained to be positive.. 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. The reference for this model is Singh et al. (1996, ApJ, 456, 766).

c6pmekl differs by using the exponential of the 6th order Chebyshev polynomial

c6mekl and c6pmekl use abundances relative to the Solar abundances set by the abund command

The variants c6vmekl and c6pvmkl with polynomial and exponential polynomial respectively allow the user to specify 14 elemental abundance.

 

For c6mekl and c6pmekl the parameters are:

par1-6

 Chebyshev polynomial coefficients

par7

 H density (cm-3)

par8

 abundance wrt to Solar

par9

 Redshift

par10

 0    calculate

 1    interpolate

 2    interpolate using APEC model

norm

Normalization

While for c6vmekl and c6vpmkl the parameters are:

par1-6

 Chebyshev polynomial coefficients

par7

 H density (cm-3)

par8-21

 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    calculate

 1    interpolate

 2    interpolate using APEC model

norm

Normalization

 

next up previous contents
Next: Cemekl Up: Additive Model Components Previous: Bremss