Added metallicity dependence to martinez26 and added martinez26_ecsn

[MarkGM02]

Changed the primary mass from 8M⊙ to 6.8M⊙ which divides high and low mass stars for the martinez26 orbital period option. This cutoff mass was chosen since it is the minimum mass for an FeCCSN at COSMIC's lowest metallicity, when default winds are used.

[codecov]

Codecov Report

❌ Patch coverage is 40.42553% with 28 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.78%. Comparing base (8772c07) to head (bec121f).
⚠️ Report is 138 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/cosmic/sample/sampler/independent.py	0.00%	28 Missing ⚠️

❌ Your patch status has failed because the patch coverage (40.43%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #760      +/-   ##
===========================================
- Coverage    86.91%   77.78%   -9.13%     
===========================================
  Files           40       50      +10     
  Lines        25542    27555    +2013     
  Branches         0      921     +921     
===========================================
- Hits         22198    21431     -767     
- Misses        3344     5837    +2493     
- Partials         0      287     +287     

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[katiebreivik]

@TomWagg mentioned that we might consider making this a metallicity-specific limit but I’m happy to merge with the inclusive 6.8 Msun limit for now once that one comment is addressed above.

[TomWagg]

Yeah I think you could make a pretty simple prescription that accounts for the metallicity dependence. Here's a grid of single stars from COSMIC and a (very crude) (but not bad!) fit :)

[TomWagg]

Or you could try fitting any SN maybe?

Here the expressions are as follows:

For CCSN:
$M = 1.1 \log_{10}(Z) + 10.1$, but $M = 6.825$ for $Z < 10^{3}$

For any SN:
$M = 1.1 \log_{10}(Z) + 10.1$ at $Z > 10^3$, $M = 6.38$ for $Z < 3\times10^{4}$, and $M = 0.8 \log_{10}(Z) + 9.2$ in between.

[MarkGM02]

Implemented this using linear interpolation in log-metallicity between nearest grid points from my single star grids!

[MarkGM02]

The mass cutoff is the FeCCSN minimum mass for martinez26 and the ECSN mass for martinez26_ecsn.

[katiebreivik]

thanks @MarkGM02 !