[Mesa-users] MESA-Nu-Interactions

Liam Kroll liam.kroll at gmail.com
Wed Aug 29 13:35:41 EDT 2018

Hi all,
Thanks so much for the feedback.
I will definitely look into revising the addition so that it can run
without any changes to the /private routines. I believe I see what Rob
means and will start working on it as soon as I get back to my desktop.
Unfortunately, I will be starting my third year of studies in just a few
days and work from my courses will have to take precedence at that time.
That said, I'm sure I will still find time to continue working on and
maintaining the addition. I welcome any suggestions or concerns from
community members. To answer Frank's question, I would very much like to
pursue graduate studies. Where that might happen is something I will start
thinking about this year.
All the best,

On Wed, Aug 29, 2018, 11:33 AM Bill Paxton, <paxton at kitp.ucsb.edu> wrote:

> Hi Liam,
> I echo the “good work” comments and encourage you to help us develop the
> user-extension capabilities of mesa to support projects like yours.  We’ll
> be quick to add “hooks” as needed and even provide you with pre-release
> revisions of mesa so you can push your development forward without delays.
> cheers,
> Bill
> On Aug 29, 2018, at 8:20 AM, Rob Farmer <r.j.farmer at uva.nl> wrote:
> Hi,
> Interesting work, i echo franks statement that you should try not to
> modify the private/ routines. Given your run_star_extras already computes a
> rate and an energy for each reaction, you might find it easier to not
> modify net_get. But instead after calling net_get (in your other_net) to
> add your rates to the results of net_get. You'll want to look at the arrays
> eps_nuc, d_eps_nuc_dRho, d_eps_nuc_dT,d_eps_nuc_dx, dxdt, d_dxdt_dRho,
> d_dxdt_dT, d_dxdt_dx which describe the energy/composition change due to
> nuclear burning, and the derivatives of the changes.
> It can take a bit of mental processing to get the right units and the
> right indexes into the arrays to insert values, but if you can express your
> results in a d(proton)/dt and d(neutron)/dt terms you can add your reaction
> results to the values mesa has calculated for the other rates and thus not
> have to modify the private/ routines.
> Rob
> On Wed, 29 Aug 2018 at 08:16, Francis Timmes via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>> hi liam,
>> i'm impressed.
>> this is meaty piece of work that adds new capability and was completed on
>> a fairly short timescale.
>> by modifying ~20 source code files i think you've gone well beyond "the
>> basics".
>> one danger though of modifying /private source code files is that your
>> edits will
>> probably not function without modification when a new version of mesa is
>> released.
>> i'm curious how much of this new capability could be encapsulated within
>> a
>> run_star_extras using only the /public interfaces and a few other_*
>> hooks.
>> the advantage for MESA-Nu-Interactions is that such a run_star_extras is
>> more likely to continue functioning when a new version of mesa is
>> released.
>> so my challenge to you is to create a MESA-Nu-Interactions 2.0 using
>> only
>> the /public interfaces and other_* hooks. if you run into an issue where
>> something doesn't seem possible without modifying a /private routine,
>> please let us know by posting a message to mesa-users at lists.mesastar.org
>> .
>> in the interim, i've added a link to your MESA-Nu-Interactions repo on
>> mesastar.org in the add-ons section. and again, congratulations on an
>> impressive body of work.
>> fxt
>> > On Aug 28, 2018, at 3:03 PM, Liam Kroll <liam.kroll at gmail.com> wrote:
>> >
>> > Hello MESA developers,
>> > My name is Liam Kroll. I am an undergraduate student at McMaster
>> University's Department of Physics and Astronomy. Through a summer
>> internship with my department I have learned how to use the basics of MESA.
>> Previously I had emailed the MESA-userslist about neutrino interactions and
>> received some very helpful information. Since then I have been spending
>> some time trying to develop an addition to MESA (r-10398) star which
>> simulates the charged current neutrino interactions on free nucleons in
>> core collapse supernovae. At this time the addition is functional but
>> relies on user supplied best guesses for the neutrino luminosities and
>> energies. Below is a link to the GitHub repository where all the files and
>> accompanying information can be found. I wanted to make you folks aware of
>> the work in case you were interested. As I am quite new to MESA (and
>> stellar astrophysics simulations in general) I would very much appreciate
>> any feedback or suggestions on how to improve the work I!
>>   have don
>>  e so far. I think all the necessary information is included in the
>> repository, but if I missed anything or you have questions, concerns, etc.,
>> I'd be happy to address them. I obtained your emails from the MESA
>> marketplace, but if you know of anyone else this addition would interest,
>> feel free to forward this message to them.
>> > Thank you for all you do,
>> > Liam
>> >
>> > https://github.com/liam-kroll/MESA-Nu-Interactions
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