[Mesa-users] Setting the value of omega/omega_critical

[AVG]

Hello Simon!


Firstly, thank you very much for your time.


I attach the plots (Figure_5*) of the stellar radius, the nuclear 
burning and the original plot (just to make it easier to compare).


I don't know how to take these plots. I see that the radius decreases 
(and so the omega increases). However, this situation doesn't change 
when I run the simulation for 2500 Myears (for example), and I always 
get a changing value of the omega. I also attach the plots of the 
simulation that ends at 2500 Myears (Figure_1*).


Best regards,


Antonio Varo



On 23/3/22 22:33, Simon Murphy wrote:
> Hi Antonio,
>
> you're setting rotation using the near_zams parameters. I think it's 
> important to note that this is not the same as 'after the ZAMS'. I 
> suspect the star is still contracting a little, which is why the 
> rotation is still increasing after it is initially set.
>
> To confirm (and for the benefit of future readers), please could you 
> plot what's happening with (a) the stellar radius, and (b) the nuclear 
> burning, alongside your rotation plot?
>
> cheers,
> - Simon
> ------------------------------------------------------------------------
> *From:* Mesa-users <mesa-users-bounces at lists.mesastar.org> on behalf 
> of AVG via Mesa-users <mesa-users at lists.mesastar.org>
> *Sent:* 24 March 2022 04:34
> *To:* mesa-users at lists.mesastar.org <mesa-users at lists.mesastar.org>
> *Subject:* [Mesa-users] Setting the value of omega/omega_critical
> Dear all,
>
> I am trying to simulate a rotating star with a given value of its
> omega/omega_critical, but I find that this parameter varies strongly in
> the first 20 Myears of the simulation since the ZAMS starts (I am
> specially interesed on what happens in those first 20 Myears after the
> ZAMS, as the work I am doing is focused on some previous results
> obtained until that time).
>
> In my simulations I turn on the rotation at the begining of ZAMS, and
> shortly after it starts the value of its omega changes quickly, as we
> can see in the image I attach. I want to set the value of the omega
> along the simulation, as I need to analyse results obtained with GYRE
> for some specific omegas (so the increasing behaviour of the omega makes
> it really difficult for me).
>
> I also attach the inlist I have used.
>
> Could someone give me some tips on this?  Any help will be appreciated.
>
> Best regards,
>
> Antonio Varo
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