Re: Re: Some questions of "inputspec_snapshot.txt"

From: 张正阳 <zzy_at_mail.ynu.edu.cn>
Date: Mon, 24 May 2021 20:52:33 +0800 (GMT+08:00)

Dear Tiago Castro,

  Thank you for your answer. I'll look for some relevant books.




Best wishes,

Zhengyang Zhang


-----原始邮件-----
发件人:"Tiago Castro" <tiagobscastro_at_gmail.com>
发送时间:2021-05-24 18:25:12 (星期一)
收件人: "Gadget General Discussion" <gadget-list_at_MPA-Garching.MPG.DE>
抄送:
主题: Re: [gadget-list] Some questions of "inputspec_snapshot.txt"


Dear Zhengyang,


   The non-linear prescription is, in fact, not needed to run the code. The inputspec file is created by the NGENIC routines and is not an input file. Probably, those extra columns are there for historical reasons. For the growth factor, I would point you to any introductory book on large-scale structure/cosmology that will give you a much richer answer than I could in a brief e-mail.


Regards,



Em seg., 24 de mai. de 2021 às 12:05, 张正阳 <zzy_at_mail.ynu.edu.cn> escreveu:


Dear Tiago Castro,

  Why we need non-linear initial conditions here,and what is the growwth factor? Looking forward to your reply.




Best wishes,

Zhengyang Zhang






-----原始邮件-----
发件人:"Tiago Castro" <tiagobscastro_at_gmail.com>
发送时间:2021-05-24 16:06:05 (星期一)
收件人: "Gadget General Discussion" <gadget-list_at_MPA-Garching.MPG.DE>
抄送:
主题: Re: [gadget-list] Some questions of "inputspec_snapshot.txt"


Dear Zhengyang,


  The first 2 numbers stand for the redshift of IC and the growth factor at this redshift. The first two columns are the linear k and Pk. The second two are the non-linear k and Pk assuming Peacock & Dodds formula.


Regards,



Em seg., 24 de mai. de 2021 às 09:11, 张正阳 <20181300064_at_mail.ynu.edu.cn> escreveu:


Hi,all,


  I couldn't understand the data of "inputspec_snapshot.txt" of the example DM-L50-N128. What do these four columns of data mean,and what do the two numbers at the beginning of the data mean? Could someone tell me the solution.

  Thank you for your help!




Best wishes,

Zhengyang Zhang
Received on 2021-05-24 14:52:45

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