VbvAstR-001
Книга Бориса В. Васильева " Астрофизика "
Книга Бориса В. Васильева
" Астрофизика "
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Ðèñ. 8.4: Ñõåìàòè÷åñêîå èçîáðàæåíèå èíòåðüåðà çâåçäû,<br />
ÿäðî, à ñíàðóæè åãî îêðóæàåò àòìîñôåðà (ðèñ.8.4). ßäðî çâåçäû èìååò ðàäèóñ<br />
(<br />
a B c<br />
R ⋆ = 1.42<br />
Z(A/Z)<br />
Gm 2 p<br />
) 1/2<br />
≈<br />
9.79 · 1010<br />
cm, (8.25)<br />
Z(A/Z)<br />
÷òî ñîñòàâëÿåò ïðèáëèçèòåëüíî 1/10 åå íàðóæíîãî ðàäèóñà.<br />
Ïðè ýòîì ìàññà ÿäðà<br />
M ⋆ = 6.84 M Ch<br />
( A<br />
Z<br />
) 2<br />
(8.26)<br />
ïî÷òè òî÷íî ðàâíà ïîëîâèíå ìàññû çâåçäû.<br />
Ïëàçìà âíóòðè ÿäðà èìååò ïîñòîÿííóþ ïëîòíîñòü<br />
n ⋆ = 16 Z 3<br />
≈ 1.2 · 10 24 Z 3 cm −3 (8.27)<br />
9π a 3 B<br />
75
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