Crab

Vela

Mass ( M )

1.4

1.8

Age (kyr)

1.24

11.3

B (1012 G)

4.875

4.35

Ω ( s 1 )

200

70

Δ Ω g / Ω

4 × 10−9

2.338 × 10−6

Δ t g ( yr )

1.6

2.5