Tesi etd-08162024-105257 |
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Tipo di tesi
Tesi di laurea magistrale
Autore
RICCI, NICHOLAS ANTONIO
URN
etd-08162024-105257
Titolo
Determinazione del rapporto di arricchimento elio-metalli dall'analisi di dati Gaia per stelle di disco locale
Dipartimento
FISICA
Corso di studi
FISICA
Relatori
relatore Degl'Innocenti, Scilla
relatore Prada Moroni, Pier Giorgio
relatore Prada Moroni, Pier Giorgio
Parole chiave
- abbondanze
- arricchimento
- Disco locale
- elio
- Gaia DR3
- rapporto
Data inizio appello
11/09/2024
Consultabilità
Non consultabile
Data di rilascio
11/09/2027
Riassunto
The helium to metal enrichment ratio is a fundamental quantity in astrophysics, that gives
us valuable information about our galaxy’s chemical evolution history. The method proposed in this study involves the use of low main sequence stars belonging to the local Galactic disk, within a distance of 125pc. That’s because photometric and astrometric data for these stars, provided by the latest data release of the Gaia mission Gaia DR3, are very precise.The helium to metal enrichment ratio has been estimated by minimizing a metric that depends intrinsically on this parameter.
us valuable information about our galaxy’s chemical evolution history. The method proposed in this study involves the use of low main sequence stars belonging to the local Galactic disk, within a distance of 125pc. That’s because photometric and astrometric data for these stars, provided by the latest data release of the Gaia mission Gaia DR3, are very precise.The helium to metal enrichment ratio has been estimated by minimizing a metric that depends intrinsically on this parameter.
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