Re: [mesa-users] MESA__overshooting__overshoot_alpha

[Martin C. <mar...@gm...>]

Hi,

About overshooting beyond the core:
in MESA it seems to be defined as
d_ov = (f-f0)*min(Hp, r_core/overshoot_alpha)

But in the literature (eg https://arxiv.org/abs/1606.00834) we often see
d_ov = alpha_overshoot *min(Hp, r_core)
or simply
d_ov = alpha_overshoot*Hp

So "alpha_overshoot" is defined in a completely different way in MESA,
correct?

thanks,

Martin

On Fri, Jul 21, 2017 at 10:28 PM, Frank Timmes <fx...@ma...> wrote:

> as for the physical meaning of the parameter,
> you may want to consult a stellar evolution textbook,
> for example, hansen and kawaler's "stellar interiors"
> followed by a reading of the mesa instrument papers
> given on http://mesa.sourceforge.net/prereqs.html .
>
> fxt
>
>
>
>
>
> > On Jul 21, 2017, at 7:06 PM, 贺祥 <he...@yn...> wrote:
> >
> > Hi Pablo Marchant.
> >
> > Sorry, it should be " overshoot_alpha".
> >
> > Best wishes,
> >
> > Xiang He
> >
> > -----原始邮件-----
> > 发件人: "Pablo Marchant" <pa...@gm...>
> > 发送时间: 2017年7月22日 星期六
> > 收件人: "贺祥" <he...@yn...>
> > 抄送: "mes...@li..." <mes...@li...
> >
> > 主题: Re: [mesa-users] MESA__overshooting__overshoot_alpha
> >
> >
> > Hi Xiang,
> >
> > what do you mean with that? MESA has no parameter called
> overshooting_overshoot_alpha. If you're trying to set overshoot, then check
> the options available here:
> >
> > http://mesa.sourceforge.net/controls_defaults.html#overshooting
> >
> > Cheers
> >
> > On Fri, Jul 21, 2017 at 6:36 AM, 贺祥 <he...@yn...> wrote:
> > Hi all,
> >
> > I am a new user of MESA code. Recently, I  was  confused  with the
> parameter "overshooting_overshoot_alpha".  I don't fully understand the
> meaning of this parameter and what kind of value should I take for this
> paramter.  Is there any one who can explain to me? Thanks in advanced.
> >
> > Best wishes,
> >
> > Xiang He
> >
> >
> >
> >
> >
> > ------------------------------------------------------------
> ------------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > _______________________________________________
> > mesa-users mailing list
> > mes...@li...
> > https://lists.sourceforge.net/lists/listinfo/mesa-users
> >
> >
> >
> >
> > --
> > Pablo Marchant Campos
> > M.Sc on Astrophysics, Universidad Católica de Chile
> > PhD on Astrophysics, Argelander-Institut für Astronomie, Universität Bonn
> >
> >
> >
> >
> > ------------------------------------------------------------
> ------------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot______
> _________________________________________
> > mesa-users mailing list
> > mes...@li...
> > https://lists.sourceforge.net/lists/listinfo/mesa-users
>
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> mesa-users mailing list
> mes...@li...
> https://lists.sourceforge.net/lists/listinfo/mesa-users
>



-- 
Martin C.