Table 2: Here we show the values of χ for main sequence stars derived in the framework of the spectral variability method.

Spectral variability method: c for MSS

Class

T = 300 K

T = 4000 K

O

> 0.59

~ (5.9 - 12) × 10-3

B

~ 0.29 - 0.59

~ (2.9 - 5.9) × 10-3

A

~ 0.24 - 0.29

~ (2.4 - 2.9) × 10-3

F

~ 0.22 - 0.24

~ (2.2 - 2.4) × 10-3

G

~ 0.2 - 0.22

~ (2 - 2.2) × 10-3

K

~ 0.16 - 0.2

~ (1.6 - 2.2) × 10-3

M

~ 0.1 - 0.16

~ (9 - 16) × 10-4