[Mesa-users] Fwd: Problem reading file

Pablo Marchant pamarca at gmail.com
Thu Apr 12 14:03:30 EDT 2018


Hi Swarmin,

it would appear you are essentially trying to recreate the binary module
outside of MESA. This seems like a very hard task, and I would strongly
recommend you against doing it unless there is a strong motivation for it.
If it's just meant as an exercise, then you should implement what you have
in run_star_extras for a single star model, instead of constantly stopping
and restarting a simulation with different options.

Do you have any strong reason to try this? Are you attempting something
that can't be done with the binary module?

Cheers

On Thu, Apr 12, 2018 at 11:43 AM, Swarnim Shashank <
swarnim.shashank at cbs.ac.in> wrote:

> Actually, I have been given this problem by my supervisor. He had asked me
> to write a code that would communicate to MESA in such a way apart from
> using the binary module provided with MESA.
>
> I am calculating accretion rate, orbital period, luminosity of the system
> and the binary separation. And I am evolving the companion using mesa star.
>
> Thanks
>
> *Swarnim Shashank*
> Fourth Year Integrated MSc. Student
> UM-DAE-Centre for Excellence in Basic Sciences
> Mumbai
>
> On 12 April 2018 at 20:32, Pablo Marchant <pamarca at gmail.com> wrote:
>
>> Hi Swarnim,
>>
>> what do you mean by "calculating the binary parameters"? Are you trying
>> to compute additional data that mesa does not provide?
>>
>> From what you say, I don't really understand why you need to stop the
>> simulation at all. It seems you could simply evolve your system all the way
>> to whatever terminating condition you want (without stopping in between),
>> and then post-process the output files.
>>
>> cheers
>>
>> On Thu, Apr 12, 2018 at 9:55 AM, Swarnim Shashank <
>> swarnim.shashank at cbs.ac.in> wrote:
>>
>>> Sorry, by mistake I sent this mail only to Francis.
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: Swarnim Shashank <swarnim.shashank at cbs.ac.in>
>>> Date: 12 April 2018 at 20:06
>>> Subject: Re: [Mesa-users] Problem reading file
>>> To: Francis Timmes <fxt44 at mac.com>
>>>
>>>
>>> Hello,
>>>
>>> I am evolving a Low mass X-ray binary system. I have written a code for
>>> calculating the binary parameters. What I want to do is at after few steps
>>> stop MESA and provide MESA values such as mass loss rate. And then resume
>>> MESA again to evolve the companion. I thought of doing it by stopping MESA
>>> with max_model_number, run the binary code then make MESA read a new
>>> (greater) max_model_number (through a file) and resume MESA using ./re. I
>>> would provide value for max_model_number and run ./re through a driver code
>>> so that I wouldn't have to do it again and again.
>>> Sorry I was not clear earlier.
>>> I would welcome if you have any other suggestion for it as well.
>>>
>>> Thank you
>>>
>>> *Swarnim Shashank*
>>> Fourth Year Integrated MSc. Student
>>> UM-DAE-Centre for Excellence in Basic Sciences
>>> Mumbai
>>>
>>> On 12 April 2018 at 19:31, Francis Timmes <fxt44 at mac.com> wrote:
>>>
>>>> hi swarnim,
>>>>
>>>> i’d like to ask why you want to read max_model_number from a file.
>>>> what problem would it solve for you, or what feature would it add for
>>>> you?
>>>>
>>>> fxt
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> > On Apr 12, 2018, at 9:21 AM, Swarnim Shashank <
>>>> swarnim.shashank at cbs.ac.in> wrote:
>>>> >
>>>> > Hello,
>>>> >
>>>> > I am an undergraduate student and I am using MESA for my project. I
>>>> want MESA to read max_model_number from a file but I am unable to implement
>>>> that. I tried doing that from run_star_extras but it didn't work.
>>>> > I am using 10108 release.
>>>> >
>>>> > Please let me know of possible ways of doing it.
>>>> >
>>>> > Thank you
>>>> > Regards
>>>> > Swarnim Shashank
>>>> > Fourth Year Integrated MSc. Student
>>>> > UM-DAE-Centre for Excellence in Basic Sciences
>>>> > Mumbai
>>>>
>>>>
>>>
>>>
>>> _______________________________________________
>>> mesa-users at lists.mesastar.org
>>> https://lists.mesastar.org/mailman/listinfo/mesa-users
>>>
>>>
>>>
>>
>>
>> --
>> Pablo Marchant Campos
>> M.Sc on Astrophysics, Universidad Católica de Chile
>> PhD on Astrophysics, Argelander-Institut für Astronomie, Universität Bonn
>>
>
>


-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD on Astrophysics, Argelander-Institut für Astronomie, Universität Bonn
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