Zero Age Horiztonal Branch Loci


ZAHBs are interpolated from this discrete grid of theoretical ZAHBs.
Useful links: Z calculator and [Fe/H] calculator.
Python routine to read: PGPUCzahb.py.

Input Parameters:

HB Progenitor mass (in solar units MHB/M) MHB : (0.7 ≤ MHB/M ≤ 0.9)
Initial Helium abundance (solar value Y=0.262) Y : (0.23 ≤ Y ≤ 0.37)
Global metallicity (solar value Z=0.0167) Z : (0.00001 ≤ Z ≤ 0.03000)
Solar scaled abundance of alpha elements (solar value [α/Fe]=0.0) [α/Fe] : (0.00 ≤ [α/Fe] ≤ 0.30)

Filters: