GALPROP https://galprop.stanford.edu/forum/ 

Diffusion coefficient in SDZ diffusion model https://galprop.stanford.edu/forum/viewtopic.php?f=5&t=278 
Page 1 of 1 
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: Attachment: Screenshot 20220627 at 15.48.28.png [ 28.2 KiB  Viewed 9504 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". For example: D_z = D_0 x Dxx_bubble_fraction 
Page 1 of 1  All times are UTC  8 hours [ DST ] 
Powered by phpBB® Forum Software © phpBB Group https://www.phpbb.com/ 