Na saite Astrometriya Astronomicheskie instrumenty Astronomicheskoe obrazovanie Astrofizika Istoriya astronomii Kosmonavtika, issledovanie kosmosa Lyubitel'skaya astronomiya Planety i Solnechnaya sistema Solnce

Gelievaya vspyshka v yadre

Vzryvoobraznyi harakter zagoraniya geliya v vyrozhdennom yadre krasnyh gigantov. Harakteren tol'ko dlya zvezd s massami men'she 3 solnechnyh, tak kak tol'ko v nih razvivaetsya gelievoe yadro sostoyashee iz vyrozhdennogo elektronnogo gaza (massa yadra ne dolzhna prevyshat' 1.4M - tak nazyvaemyi predel Chandrasekhara). Dlya vyrozhdennogo gaza harakterna pochti polnaya nezavisimost' davleniya ot temperatury. Tak kak davlenie ne rastet, hotya yadro i nagrevaetsya, to ne proishodit rasshireniya, a sledovatel'no i ohlazhdeniya materii. Yadro stanovitsya vse goryachee i goryachee poka vzryvoobraznym harakterom ne zagoritsya gelii - eto i nazyvaetsya gelievoi vspyshkoi. Dlitel'nost' vspyshki 5 10⁴ let, i v nei sgoraet ne bolee 1% geliya. Gaz ostaetsya vyrozhdennym do teh por poka temperatura ne podnimetsya pri vspyshke, pri novoi temperature u elektronov budet bol'she stepenei svobody i vyrozhdenie gaza snimaetsya. Rezul'tatom budet novoe ravnovesie zvezdy, spokoinoe gorenie geliya v yadre i ee peremeshenie na gorizontal'nuyu vetv'.

V. A. Baturin, I. V. Mironova
Glossarii Astronet.ru

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