Re: TimeBegin and TimeMax Question

From: Volker Springel <volker_at_MPA-Garching.MPG.DE>
Date: Thu, 2 Feb 2017 10:49:32 +0100

On 02 Feb 2017, at 00:52, Jared Coughlin <Jared.W.Coughlin.29_at_nd.edu> wrote:

> Hello! Thank you for your response! Just so I'm clear, in the user manual it says that for the default system of units (which I'm using), the unit of time is 9.8 x 10^8 yr/h. So, if I want a simulation that runs for 500 Myr, I set TimeBegin = 0.0 and TimeMax = 0.357. So, since 0.357 * 9.8 x 10^8 yr/h = 499800000 yr (with h = 0.7), this should work, correct? Thank you!
> -Jared
>

Correct.
Volker



> On Sat, Jan 28, 2017 at 9:55 AM, Volker Springel <volker_at_mpa-garching.mpg.de> wrote:
>
>
> > On 27 Jan 2017, at 18:10, Jared Coughlin <Jared.W.Coughlin.29_at_nd.edu> wrote:
> >
> > Hello! I just have a quick question about the parameters TimeBegin and TimeMax from the parameter file. In the user manual they are described as being the values of the scale factor for the start and end of the simulation if comoving integration is on. However, if comoving integration is off, it just says that they correspond to the time variable.
>
>
> Hi Jared,
>
> > If, say, I wanted to run a simulation with comoving integration off for 500 Myr, what should the values of TimeBegin and TimeMax be? Do they correspond to just arbitrary times in internal time units and their difference needs to be 500 Myr? Thanks!
>
> Yes, this is exactly right.
>
> Volker
>
>
>
> > -Jared
> >
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Received on 2017-02-02 10:49:22

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