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Book Boris V. Vasiliev Astrophysics

The plasma inside the

The plasma inside the core has the constant density and constant temperature n ⋆ = 16 Z 3 ≈ 1.2 · 10 24 Z 3 cm −3 (6.27) 9π a 3 B ( ) 1/3 ( ) 25 · 13 c T ⋆ = Z ≈ Z · 2.13 · 10 7 K. (6.28) 28π 4 ka B The plasma density and its temperature are decreasing at an approaching to the stellar surface: ( ) 6 R⋆ n e(r) = n ⋆ (6.29) r and ( ) 4 R⋆ T r = T ⋆ . (6.30) r The external radius of the star is determined as ( √απ ) A 1/2 Z R 0 = mp 6.44 · 1011 R ⋆ ≈ cm (6.31) 2η m e Z(A/Z) 1/2 and the temperature on the stellar surface is equal to ( ) 4 R⋆ T 0 = T ⋆ ≈ 4.92 · 10 5 Z (6.32) R 0 (A/Z) 2 53

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Nuclear Astrophysics
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