[Mesa-users] Fw: Light Curves for Variable Stars

[Radek Smolec]

Dear Alex,

> I think I can run the rsp_Cepheid module from the test suites, but I am
> not quite sure what the correct output is supposed to be or look like.
>
The inlist in rsp_Cepheid (in test_suite), without modification, is for
guidance and testing. MESA will stop after computing just 10 cycles, so the
model is not yet converged.
Edit inlist_rsp_Cepheid and comment these lines (just add '!' before, as
below):
   !max_model_number = 16000
   !x_integer_ctrl(1) = 10 ! which period to check
   !x_ctrl(1) = 3.93338d0 ! expected period (in days)
Add a control that says how many pulsation cycles you want to compute (in
&controls part of the inlist):
   RSP_max_num_periods = 2000
Run your model - it will now take much more time.
The results are stored in the LOGS/ directory. Light curve is in
history.data - check the info in the header to find the columns that are of
interest to you.
Most likely you are interested in the final light cure - you need to
analyse the last pulsation cycles only, for which the amplitude of
pulsation is more or less constant

As in all calculations done with RSP, it is your job to check whether the
model is at full amplitude pulsation - read Section 2.2.4 of the instrument
paper. For the just discussed model 2000 cycles is enough.
Also, to produce nice light curves (e.g. brightness vs. phase, or radial
velocity vs. phase) it is best to use some post-processing tools (e.g. to
determine the nonlinear period precisely, to phase the data, etc.)


> Lastly, I installed the 2_rsp.zip file for instrument paper but do not
> know how to use the inlists in the file.
>
Copy the inlists that are of interest to you to your working directory.
Make sure that 'inlist' points to both inlist_rsp_common (which, as name
indicates, was common for all runs done for the instrument paper) and the
other specific inlist (which differs, depending on the figure in the paper).

In case you have problems, please be more specific: which inlist you tried,
what failed, what you expected and seems not to work.
Cheers,
Radek


>
> My apologies if this is too forward or too demanding, as I do not have
> much programming experience.
>
>
> Alex
>
>
>
> ------------------------------
> *From:* Wallace, Alexander
> *Sent:* Monday, July 1, 2019 11:17 PM
> *To:* smolec at camk.edu.pl
> *Cc:* mesa-users
> *Subject:* Re: [Mesa-users] Light Curves for Variable Stars
>
>
> Thank you for your help; I have read the "Getting Started" section and
> still am not quite sure as to what to do.
>
>
> I think I can run the rsp_Cepheid module from the test suites, but I am
> not quite sure what the correct output is supposed to be or look like.
>
>
> Lastly, I installed the 2_rsp.zip file for instrument paper but do not
> know how to use them.
>
>
> My apologies if this is too forward or
> ------------------------------
> *From:* Radek Smolec <smolec at camk.edu.pl>
> *Sent:* Friday, June 28, 2019 1:25:51 PM
> *To:* Wallace, Alexander
> *Cc:* mesa-users
> *Subject:* Re: [Mesa-users] Light Curves for Variable Stars
>
> Dear Alex,
>
> RSP can model light curves of Cepheids and RR Lyrae stars as described in
> the instrument paper (Section 2 already contains some practical advice
> about running the models).
> I think it is best to start playing with test_suite examples (those that
> start with rsp).
> You can also find all inlists that were used to generetae plots in the
> instrument paper at zenodo:
> https://zenodo.org/record/2582657
> Input files and data for paper "Modules for Experiments in Stellar
> Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective
> Boundaries, and Energy Conservation" <https://zenodo.org/record/2582657>
> zenodo.org
> This entry contains input files to reproduce the results of the paper:
> Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable
> Stars, Rotation, Convective Boundaries, and Energy Conservation. Each zip
> archive corresponds to a section of the paper, and includes README files in
> ASCII format with a description. Raw output data and plotting tools are
> also provided for some of the results.
>
>
> If you haven't run MESA before, start with
> http://mesa.sourceforge.net/starting.html
> to learn about basics: inlists, output and running the models.
> Cheers,
> Radek
>
> pt., 28 cze 2019 o 19:53 Wallace, Alexander <aawallace at mail.smu.edu>
> napisał(a):
>
> Hello,
>
>
> I recently the most recent versions of MESA (11701) and MESASDK (released
> on May 3) and have a question or two about the new radial stellar pulsation
> functionality. I read section 2 of the last instrument paper (Modules for
> Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars,
> Rotation, Convective Boundaries, and Energy Conservation), and it was my
> understanding that RSP can be used to generate light curves of variable
> stars such as classical Cepheids and RR Lyrae. Is this correct, and if it
> is, is there some kind of documentation/tutorial that described how this is
> done?
>
>
> Many thanks,
>
>
> Alex
>
>
> _______________________________________________
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>
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