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gadem, vgadem: plasma emission, multi-temperature with gaussian distribution of emission measure.

A multi-temperature plasma emission model built on top of the apec or mekal codes. The emission measure distribution is a gaussian with mean and sigma given by the first two model parameters. The switch parameter determines whether the apec or mekal codes will be used. For the mekal code there are also the options to run the code for each temperature or interpolate from a pre-calculated table. The former is slower but more accurate. See the documentation on the apec model for additional information on using different AtomDB versions or applying thermal or velocity broadening.

For the gadem version, the abundance ratios are set by the abund command. The vgadem variant allows the user to define abundances for the more common elements. See the documentation on the apec model for information on using additional elements included in AtomDB.

The parameters for gadem are:

par1 mean temperature for gaussian emission measure distribution
par2 sigma temperature for gaussian emission measure distribution
par3 nH (cm$^{-3}$)
par4 abundance relative to Solar
par5 redshift z
par6 switch (0 = calculate using MEKAL model; 1 = interpolate using MEKAL model; 2 = interpolate using APEC model)
norm Normalization

For the vgadem variant the parameters are:

par1 mean temperature for gaussian emission measure distribution
par2 sigma temperature for gaussian emission measure distribution
par3 nH (cm$^{-3}$)
par4-17 abundance relative to solar Abundances for He, C, N, O, Ne, Na, Mg, Al, Si, S,Ar, Ca, Fe, Ni wrt Solar (defined by the abund command)
par18 redshift z
par19 switch (0 = calculate using MEKAL model; 1 = interpolate using MEKAL model; 2 = interpolate using APEC model)
norm Normalization


next up previous contents
Next: gauss, zgauss: gaussian line Up: Additive Model Components Previous: ezdiskbb: multiple blackbody disk