Algol Paradox · mass-ratio reversal
unseel.com · β Persei · tMS ∝ M⁻²·⁵
Donor 3.0 M☉
Gainer 1.5 M☉
phase
Donor (was heavy)
Gainer (now heavy)
L1 transfer stream
Roche lobe
Unseel.com · Algol Paradox