Supernova effects on Server Sky and Stady Shell

The Sun's absolute bolometric (all band) magnitude is +4.74, 3.828e26 W, so an absolute magnitude of zero is 3.013e28 W.

Supernovae Light Curves:

(by litopsian on Wikipedia)

• Stellar Interiors by Hansen+ QB808 H36 1994
  • Table 6.3 p 247
  • C + C → Ne + α 44% . . . C + C → Na + p 56%
  • O + O → Si + α 21% . . . O + O → P + p 61% . . . O + O → Si + n 18%
    • Thielemann and Arnett 1985 2x downloaded
  • Truran 1966 (paywall)
  • Bodansky Clayton Fowler 1968 2x downloaded
  • Section 6.8 p251 Neutrino emission mechanisms

    • When temperatures are high enough - kT ~ 2 m_ec² photons creates electron positron pairs

    • Ordered this book!

AL26

The 1.8 MeV gamma emission of ²⁶Al decay to ²⁶Mn tells us about galactic frequency of Type II supernovae, about 2 per century , estimated from the gamma emissions from the ²⁶Al around us, about 2.8 solar masses in the galaxy (5.6e30 kg). One supernova produces 2.5e26 kg of ²⁶Al. The half life of ²⁶Al is 717 ky, so the decay rate is 3e-14 per second, or 7e11 decays/kg-s, or 0.2 W/kg. Assuming 0.04 c radial velocity, and isotropic deposition at a distance of 100 light years (9.4605e17m) 2500 years later (0.25% has decayed), the deposited material density is 2.2e-11 kg/m², the radioactivity is 4e-12 W/m² or 7.4 MeV/m²-s or about 4 decays per second. Not much.