[Mesa-users] (no subject)

[Rob Farmer]

If you keep the replies on list then other people might be able to help or
be helped.

Maybe someone who works with white dwarfs can help here?

Rob

On Tue, 3 Dec 2019, 02:35 zhaoweitao at ynao.ac.cn, <zhaoweitao at ynao.ac.cn>
wrote:

> Hi Rob
>
>          I'm happy to receive your reply soon .I tried to tau=300.In
> Nomoto's steady burn model ,when the rate of accrate material excess this
> critical value,WD will keep  expanding ,but if this tau=300 and the
> accration rate more than the critical value,WD won't keep expending.
>
>
> Zhao
>
>
> -------- Original message --------
> From: Rob Farmer <r.j.farmer at uva.nl>
> Date: Mon, Dec 2, 2019, 11:10 PM
> To: zhaoweitao at ynao.ac.cn, mesa-users <mesa-users at lists.mesastar.org>
> Subject: Re: [Mesa-users] (no subject)
>
> Hi,
> Please keep all replies on list.
>
> Did you try the value of 300 from the wd2 test case?
>
> Tau is the optical depth for the outer boundary. By making tau large you
> ignore the outer layers (material at lower tau values), this can help with
> convergence issues as you don;t have to model this material.
>
> Rob
>
>
> On Mon, 2 Dec 2019 at 12:04, zhaoweitao at ynao.ac.cn <zhaoweitao at ynao.ac.cn>
> wrote:
>
> Hello Rob
>
>           I'm sorry for not expressing clearly.
>           Now,I am simulating the light curve of supersoft X-ray sources
> by MESA.  The suite case wd2 was used to simulate the expand and shrink of
> WD,but I don't know how to set the proper parameters of the set_tau_factor
> and set_to_this_tau_factor. If I set the parameter too small (such as 1 or
> 2/3), MESA will appear logQ_min_limit or get_atm_eos_kap_info  and do
> atm_grey_and_kap.
>          So I would like to know the suitable range of parameter to WD,
> and in MESA,what this tau stand for? What it determines? My settings are in
> the attachment.
> Zhao
>
>
> -------- Original message --------
> From: Rob Farmer <r.j.farmer at uva.nl>
> Date: Mon, Dec 2, 2019, 5:49 PM
> To: zhaoweitao at ynao.ac.cn
> Cc: MESA <mesa-users at lists.mesastar.org>
> Subject: Re: [Mesa-users] (no subject)
>
> Hi,
>
> Its unclear what you are doing, what parameter are you changing? What
> result is wrong and why is it wrong? Providing your inlist as well as the
> parameters you are changing is needed before we can help.
>
> Rob
>
> On Sat, 30 Nov 2019 at 14:28, zhaoweitao at ynao.ac.cn <zhaoweitao at ynao.ac.cn>
> wrote:
>
> Hi
>      Recently, I'm using MESA to simulate the light curve. In  star_job
> defaults,I don't know how to set the appropriate parameters of opcital
> depth. At present, I set the parameter range to 1~30,if the parameter is
> too large ,the result is not what i want,and the parameter is too
> small,MESA error when running. so anyone tell me why?
> at the same time,i would like to know what  is the specific definition of
> optical depth in MESA. I only know  that use optical depth to determine the
> surface boundary condition in the MESA atmosphere model.
>       ZHAO Weitao
>
>
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