|
|
Sedov model with separate ion and electron temperatures and variable
abundances. XSpec model.
Sedov model with separate ion and electron temperatures. This model is
slow.
kTa provides a measure of the average energy per particle
(ions + electrons) and is constant throughout the post-shock flow in
plane shock models (Borkowski et al., 2001, ApJ, 548, 820). kTb should
always be less than kTa. If kTb exceeds kTa then their interpretations
are switched (i.e. the larger of kTa and kTb is always the mean
temperature).
Additional references for this model can be found in the help file for
the xsequil model ("ahelp xsequil").
xsvsedov Parameters
| 1 | kTa | mean shock
temperature in keV |
| 2 | kTb | electron
temperature immediately behind the shock front (keV) |
| 3 | H | hydrogen density in
cm^-3 |
| 4-14 | (element) | abundances
for He, C, N, O, Ne, Mg, Si, S, Ca, Fe, Ni with respect to
Solar. Abundances are set by the xspecabundan command. |
| 15 | Tau | ionization age
(s/cm^3) of the remnant (== ambient hydrogen number density times
age of remnant) |
| 16 | redshift | redshift,
z |
| 17 | norm | 10^-14 / (4 pi
(D_A*(1+z))^2) Int n_e n_H dV, where D_A is the angular size
distance to the source (cm), n_e is the electron density (cm^-3),
and n_H is the hydrogen density (cm^-3) |
This information is taken from the XSpec User's Guide. Version 11.3.1 of the XSpec
models is supplied with CIAO 3.2.
For a list of known bugs and issues with the XSPEC models, please visit the XSPEC bugs page.
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- slang
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usermodel
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