[Mesa-users] Dust formation

[trobolo dinni]

Hi Aaron,

thank you.

Cheers,
Roberto


On Mon, 19 Nov 2018 at 20:32, Aaron Dotter <aaron.dotter at gmail.com> wrote:

> Hi Roberto,
>
> Are you aware of any other opacity tables dealing with low T and Rho and
>> including H?
>>
>
> No, I'm not.  If anyone who reads this knows of a source, I hope they'll
> share it with us.
>
> Aaron
>
>>
>>
>> On Sat, 17 Nov 2018 at 03:59, Aaron Dotter <aaron.dotter at gmail.com>
>> wrote:
>>
>>> Hi Roberto,
>>>
>>> I am dealing with gas having temperatures lower than 10^3 K, in some
>>>> situations lower than 10^2 K and densities of the order of 10^-13gcm-3.
>>>> According to the MESA paper this should below the thresholds tabulated.
>>>> In this case how does the code handle the opacities?
>>>>
>>>
>>> The code decides what to do in cases like this from the logical flag
>>> clip_to_kap_table_boundaries, which is set to .true. in
>>> kap/public/kap_def.f90.
>>>
>>> If you have a temperature that is below the table limit, then you'll get
>>> an opacity value that is consistent with the lowest temperature in the
>>> table.  Likewise for density.
>>>
>>> If you were to set this flag to false (and recompile!), then whenever
>>> you go outside of table the call to kap would return an error and the run
>>> would stop.
>>>
>>> Depending on your case, you might look at using the Freedman et al.
>>> opacities. These have a much lower temperature limit (logT_min = 1.88) but
>>> also note that these are H-free.  This is discussed in MESA 2.
>>>
>>> Cheers,
>>> Aaron
>>>
>>>
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