[Mesa-users] Question about neon burning rates

[Jeremy Sakstein]

Hi Ebraheem,

I am using approx21 but what you said is surprising. I would not expect
20Ne(alpha,gamma)24Mg to be important at the temperatures of my model
(logT~8.6-8.8).

Cheers,

Jeremy

On Tue, Dec 5, 2023 at 11:41 AM Ebraheem Farag <ekfarag at asu.edu> wrote:

> If you're using an approx21 network, the "burn_ne" label refers
> exclusively to 20Ne(alpha,gamma)24Mg. Otherwise, it is an umbrella term as
> Frank described.
>
> -EbF
>
> On Mon, Dec 4, 2023 at 11:12 PM Jeremy Sakstein via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
>> Hi everyone,
>>
>> I am interested in tracking neon burning, and have arrived at a bit of a
>> puzzle.
>>
>> I am seeing significant neon burning via the 'burn_ne' profile variable
>> at temperatures of order logT=8.6-8.8 i.e., lower than I would expect neon
>> burning to be significant. I am working with version 12778.
>>
>> When I look at rates/private/ratelib.f90, I can see that the ne20gp
>> reaction redirects me to f19(p,g)ne20. When I look up this rate, it appears
>> that it is important at the temperatures I am working with, so could be
>> responsible for the neon burning I am seeing. My current hypothesis is that
>> I am seeing the inverse reaction happening.
>>
>> Does anyone have any insight into this?
>>
>> Also, can someone tell me why the rne20gp redirects me to f19(p,g)ne20?
>>
>> Cheers,
>>
>> Jeremy
>>
>> --
>> Jeremy Sakstein (He/Him/His)
>> Assistant Professor of Theoretical Physics
>> Department of Physics & Astronomy
>> University of Hawaiʻi at Mānoa
>> Watanabe Hall
>> 2505 Correa Road
>> Honolulu, HI, 96822, USA
>> http://www.jeremysakstein.com
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>>
>>

-- 
Jeremy Sakstein (He/Him/His)
Assistant Professor of Theoretical Physics
Department of Physics & Astronomy
University of Hawaiʻi at Mānoa
Watanabe Hall
2505 Correa Road
Honolulu, HI, 96822, USA
http://www.jeremysakstein.com
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