|Diffusion coefficient in SDZ diffusion model
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|Author:||jstvdk [ Mon Jun 27, 2022 6:51 am ]|
|Post subject:||Diffusion coefficient in SDZ diffusion model|
I am trying to model gamma ray emission around Pulsar. Similar model as in paper "Johannesson, Porter & Moskalenko, The ApJ, 879:91 (2019)" about Geminga.
The question is where in the code/galdeffile can I find option to change the parameter D_z - diffusion coefficient in SDZ (slow diffusion region)? This parameter occurs in the formula 3 from aforementioned paper, here is the image with this formula where one can find this parameter D_z:
Screenshot 2022-06-27 at 15.48.28.png [ 28.2 KiB | Viewed 2886 times ]
|Author:||jstvdk [ Wed Jul 27, 2022 3:22 am ]|
|Post subject:||Re: Diffusion coefficient in SDZ diffusion model|
I found out an answer and maybe for someone it will be interesting.
"D_z" coefficient are obtaining from multiplying of "D_0" to some specified number. In galdef file this number called "Dxx_bubble_fraction".
D_z = D_0 x Dxx_bubble_fraction
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