[Mesa-users] Mesa-users Digest, Vol 52, Issue 4

Fri Nov 5 14:19:17 UTC 2021

> So I have some questions as follow:
> 1.In different metallicity Z,is the ratio among all isotopes fixed?what is
> the ratio? Which paper do this ratio refer?
>

Yes, it is the scaled the same for all Z.  The ratio depends on your choice
of the heavy element distribution, which can be set in the star_job section
of the inlist.

https://docs.mesastar.org/en/r15140/reference/star_job.html#initial-zfracs

> 2.Why didn't the flag 'dump_missing_metals_into_heaviest = .true.' work?
>

As I noted in my previous email, the default value for this flag is true,
so by setting it to true in your inlist you have not changed anything --
and therefore should not expect to see any difference.

Aaron

>
>
>
>
> At 2021-11-04 20:00:03, mesa-users-request at lists.mesastar.org wrote:
> >Send Mesa-users mailing list submissions to
> >	mesa-users at lists.mesastar.org
> >
> >To subscribe or unsubscribe via the World Wide Web, visit
> >	https://lists.mesastar.org/mailman/listinfo/mesa-users
> >or, via email, send a message with subject or body 'help' to
> >	mesa-users-request at lists.mesastar.org
> >
> >You can reach the person managing the list at
> >	mesa-users-owner at lists.mesastar.org
> >
> >When replying, please edit your Subject line so it is more specific
> >than "Re: Contents of Mesa-users digest..."
> >
> >
> >Today's Topics:
> >
> >   1. Re: [Fe/H] Calculation with MESA Outputs (Aaron Dotter)
> >   2. Re: c13_pocket stop running during TACHeB (Rob Farmer)
> >   3. Re: c13_pocket stop running during TACHeB (Liguo)
> >   4. Fw: University of Sydney Postdoctoral Research Associate in
> >      Stellar Astrophysics (women only) (Dennis Stello)
> >
> >
> >----------------------------------------------------------------------
> >
> >Message: 1
> >Date: Wed, 3 Nov 2021 08:11:14 -0400
> >From: Aaron Dotter <aaron.dotter at gmail.com>
> >To: Rob Farmer <robert.j.farmer37 at gmail.com>
> >Cc: Mitchell Dennis <mtde226 at hawaii.edu>, mesa-users
> >	<mesa-users at lists.mesastar.org>
> >Subject: Re: [Mesa-users] [Fe/H] Calculation with MESA Outputs
> >Message-ID:
> >	<CAN5--jNBGjtMpbLr1RpLnZRJpOA7TOGZbZFC5vnXfc+pqoJruQ at mail.gmail.com>
> >Content-Type: text/plain; charset="utf-8"
> >
> >Hi Mitchell,
> >
> >A couple of additions to Rob's good suggestion.
> >
> >- You can add isotopes to a network without adding the nuclear reactions.
> >For example, if you're interested in tracking the surface evolution of Fe56
> >in solar type stars, which won't create or destroy Fe56, then you can still
> >use a simple net like basic for energy generation but also track the mixing
> >history of other isotopes.
> >
> >- Whether you do the above or not, beware of a little known feature in
> >MESA: In the star_job inlist there is a flag called
> >
> >      ! dump_missing_metals_into_heaviest
> >      ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> >      ! this controls the treatment metals that are not included in the
> >current net.
> >      ! if this flag is true, then the mass fractions of missing metals are
> >added
> >      ! to the mass fraction of the most massive metal included in the net.
> >      ! if this flag is false, then the mass fractions of the metals in the
> >net
> >      ! are renormalized to make up for the total mass fraction of missing
> >metals.
> >
> >      ! ::
> >
> >    dump_missing_metals_into_heaviest = .true.
> >
> >What this means is that any elements in the solar mixture that are not
> >explicitly included in the network are going to be added to the heaviest
> >element in the network.  Depending on the network you choose, this may be a
> >small fraction.  If you use an approx21 net, or follow my suggestion above,
> >make sure that the element you want to track is not the heaviest in the net
> >(or turn the above flag to false but then you have a different problem . .
> >.).
> >
> >See attached example.  I use Zn64 as a placeholder for all the extras so
> >that Fe56 will just be Fe56.
> >
> >Aaron
> >-------------- next part --------------
> >An HTML attachment was scrubbed...
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211103/3906833e/attachment-0001.htm>
> >-------------- next part --------------
> >A non-text attachment was scrubbed...
> >Name: basic_extra.net
> >Type: application/octet-stream
> >Size: 78 bytes
> >Desc: not available
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211103/3906833e/attachment-0001.obj>
> >
> >------------------------------
> >
> >Message: 2
> >Date: Wed, 3 Nov 2021 14:03:13 +0100
> >From: Rob Farmer <robert.j.farmer37 at gmail.com>
> >To: Liguo <liguo070923 at 163.com>
> >Cc: mesa-users <mesa-users at lists.mesastar.org>
> >Subject: Re: [Mesa-users] c13_pocket stop running during TACHeB
> >Message-ID:
> >	<CAPvTSya47h2RX054jJ11oh_=09+Py3gxXvfaimpsZMGs1dQE1w at mail.gmail.com>
> >Content-Type: text/plain; charset="utf-8"
> >
> >Hi,
> >That's not enough information to diagnose a problem.
> >
> >You need to show your inlists (and your nuclear network).
> >
> >What is your star doing when it stops?
> >Have you made any plots to try to diagnose the problem yourself?
> >Are there regions of the star where it seems like mesa is having
> >difficulties?
> >What have you tried to do to fix the problem yourself?
> >
> >Rob
> >
> >On Tue, 2 Nov 2021 at 09:47, Liguo via Mesa-users <
> >mesa-users at lists.mesastar.org> wrote:
> >
> >> Dear MESA Mailing List,
> >>   I can run c13_pocket successfully with it's default setting.But when I
> >> changed it's net to bigger net than agb.net,It will stop running in
> >> TACHeB phase with error as follow:
> >>   stopping because of problems dt < min_timestep_limit
> >>   My net have about 250 isotopes.
> >>   Any suggestions or help would be very appreciated!
> >>
> >>   sincerely!
> >>   Liguo
> >>
> >>
> >>
> >> _______________________________________________
> >> mesa-users at lists.mesastar.org
> >> https://lists.mesastar.org/mailman/listinfo/mesa-users
> >>
> >>
> >-------------- next part --------------
> >An HTML attachment was scrubbed...
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211103/68b4531b/attachment-0001.htm>
> >
> >------------------------------
> >
> >Message: 3
> >Date: Thu, 4 Nov 2021 10:49:58 +0800 (CST)
> >From: Liguo  <liguo070923 at 163.com>
> >To: "Rob Farmer" <robert.j.farmer37 at gmail.com>,  mesa-users
> >	<mesa-users at lists.mesastar.org>
> >Subject: Re: [Mesa-users] c13_pocket stop running during TACHeB
> >Message-ID: <668e3033.2111.17ce8da62d2.Coremail.liguo070923 at 163.com>
> >Content-Type: text/plain; charset="gbk"
> >
> >Dear Rob
> >Thank you for your reply!
> >My star stopped running after h burning and before he burning.
> >I have tried to set min_timestep_limit = 1d-20.Star then stopped running with error segmentation fault-invalidmemory reference.
> >I attach my inlist and net file in the end.
> >I only change net to my net in inlist_common of c13_pocket.
> >
> >
> >sincerely!
> >Liguo
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >? 2021-11-03 21:03:13?"Rob Farmer" <robert.j.farmer37 at gmail.com> ???
> >
> >Hi,
> >
> >That's not enough information to diagnose a problem.
> >
> >
> >You need to show your inlists (and your nuclear network).
> >
> >
> >
> >What is your star doing when it stops?
> >
> >Have you made any plots to try to diagnose the problem yourself?
> >
> >Are there regions of the star where it seems like mesa is having difficulties?
> >
> >What have you tried to do to fix the problem yourself?
> >
> >
> >Rob
> >
> >
> >
> >On Tue, 2 Nov 2021 at 09:47, Liguo via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> >
> >Dear MESA Mailing List,
> >  I can run c13_pocket successfully with it's default setting.But when I changed it's net to bigger net than agb.net,It will stop running in TACHeB phase with error as follow:
> >  stopping because of problems dt < min_timestep_limit
> >  My net have about 250 isotopes.
> >  Any suggestions or help would be very appreciated!
> >
> >
> >  sincerely!
> >  Liguo
> >
> >
> >
> >
> >
> >
> >_______________________________________________
> >mesa-users at lists.mesastar.org
> >https://lists.mesastar.org/mailman/listinfo/mesa-users
> >
> >-------------- next part --------------
> >An HTML attachment was scrubbed...
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211104/df109bb2/attachment-0001.htm>
> >-------------- next part --------------
> >A non-text attachment was scrubbed...
> >Name: inlist_common
> >Type: application/octet-stream
> >Size: 2038 bytes
> >Desc: not available
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211104/df109bb2/attachment-0002.obj>
> >-------------- next part --------------
> >A non-text attachment was scrubbed...
> >Name: SprocessWang_agb.net
> >Type: application/octet-stream
> >Size: 1677 bytes
> >Desc: not available
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211104/df109bb2/attachment-0003.obj>
> >
> >------------------------------
> >
> >Message: 4
> >Date: Thu, 4 Nov 2021 15:24:55 +1100
> >From: Dennis Stello <dennis.stello at sydney.edu.au>
> >To: Mesa-users <mesa-users at lists.mesastar.org>
> >Subject: [Mesa-users] Fw: University of Sydney Postdoctoral Research
> >	Associate in Stellar Astrophysics (women only)
> >Message-ID: <88bd20ef-ec99-2671-51a4-b0b8dd9e134e at sydney.edu.au>
> >Content-Type: text/plain; charset="utf-8"; Format="flowed"
> >
> >Dear mesa users,
> >
> >A potential opportunity to work on stars in Sydney.
> >
> >Best
> >Dennis/
> >
> >
> >-------- Forwarded Message --------
> >Subject: 	Fw: University of Sydney Postdoctoral Research Associate in
> >Stellar Astrophysics (women only)
> >Date: 	Thu, 4 Nov 2021 04:20:24 +0000
> >From: 	Tim Bedding <tim.bedding at sydney.edu.au>
> >To: 	Dennis Stello <d.stello at unsw.edu.au>
> >
> >
> >
> >Hi Dennis,
> >
> >Can you please forward to the MESA list?
> >
> >thanks
> >
> > ? ?Tim
> >
> >------------------------------------------------------------------------
> >
> >The University of Sydney is welcoming applications for a three-year
> >*Postdoctoral Research Associate in Stellar Astrophysics (women only)*.
> > ? The successful applicant will be working with Tim Bedding
> ><mailto:tim.bedding at sydney.edu.au>?and Daniel Huber?in
> >*asteroseismology, exoplanets or other related areas of stellar
> >astrophysics*.??More details can be found here
> ><https://protect-au.mimecast.com/s/dqdXCjZ1N7in8k2JXfW0iOZ?domain=usyd.wd3.myworkdayjobs.com>?or
> >on the AAS jobs register. Applications close 28-Nov-2021.
> >-------------- next part --------------
> >An HTML attachment was scrubbed...
> >URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211104/0f01a90f/attachment-0001.htm>
> >-------------- next part --------------
> >_______________________________________________
> >ASA mailing list
> >ASA at mailman.sydney.edu.au
> >Change membership status or contact information via ASA's Edit Membership page
> >https://protect-au.mimecast.com/s/j2HgClx1Nji2xDyK8uyhTIH?domain=asa.wildapricot.org
> >
> >End of Mesa-users Digest, Vol 52, Issue 4
> >*****************************************
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211105/8b31cd25/attachment.htm>