Sirius System Astrophysics: Why Complex Life CANNOT Have Evolved There

Type: A1V blue-white main sequence
Mass: 2.06 solar masses
Luminosity: 25.4× Sun
Temperature: 9,940 K (vs Sun 5,777 K)
TOTAL main sequence lifespan: 1.64 billion years
Current age: ~225-250million years
Remaining: ~1.4 billion years

PROBLEM: Complex life on Earth took 3.5+ billion
years to evolve (first cells ~3.8 Gya, first
animals ~600 Mya, first intelligence ~0.3 Mya).
Sirius A's TOTAL lifespan (1.64 Gyr) is less than
HALF the time Earth needed. Not enough time.

Original progenitor: ~5 solar masses
Main sequence lifetime: ~100-126million years
(ApJ 2005: Liebert et al.)
Became red giant ~120million years ago.
Red giant expansion STERILIZED inner system.
Lost ~4 solar masses of material.
Now: 1.03 solar masses, white dwarf.

PROBLEM: 100million years is absurdly short.
On Earth, 100 Mya = dinosaurs hadn't even
gone extinct yet. Complex life: impossible.

250 Mya on Earth = Permian period.
No mammals. No birds. Barely any dinosaurs.
Land plants just ~200million years old.
The Sirius system is a BABY.