Stelle variabili

Stelle variabili

Magdy Elkhateeb / Moqbil Alenazi

61,69 €
IVA incluido
Disponible
Editorial:
KS OmniScriptum Publishing
Año de edición:
2023
Materia
Física
ISBN:
9786206670964
61,69 €
IVA incluido
Disponible
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Lo studio delle stelle variabili svolge un ruolo importante nella comprensione delle proprietà fisiche delle galassie e degli ammassi in cui sono presenti. Si ritiene che le stelle negli ammassi globulari si siano formate all’incirca nello stesso momento (anche se ci sono prove sempre più evidenti che alcuni ammassi si sono formati attraverso diversi episodi di formazione stellare), dallo stesso materiale primordiale e con la stessa composizione. Questo dovrebbe portare a un’omogeneità in alcune proprietà fondamentali delle stelle all’interno di ciascun ammasso, ma con differenze tra gli ammassi. Le conoscenze su queste proprietà, come la metallicità, l’età e la cinematica, sono quindi importanti. Un modo per ottenere migliori vincoli su alcuni di questi parametri fisici è studiare la popolazione di stelle variabili, in particolare le stelle RR Lyrae. L’osservazione delle stelle variabili in diversi ambienti galattici permette di mettere in relazione i tipi di stelle variabili con le popolazioni stellari delle galassie che le ospitano.

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