Stella di classe B V
Multi tool use
Regolo è la stella più brillante dell'immagine. La debole macchia chiara al centro è la galassia nana sferoidale UGC 5470.
Diagramma H-R
M
a
g
n.
a
s
s
o
l
u
t
a
Tipo spettrale
Temperatura (× 10³ kelvin)
Oggetti
stellari
giovani
Nane
brune
Nane
bianche
Subnane
Stelle "nane"
Sequenza principale
Nane blu
Bianco-azzurre
Bianche
Bianco-gialle
Gialle
Arancioni
Rosse
Subgiganti
Giganti
Blu
Rosse
Giganti brillanti
Supergiganti
Blu
Gialle
Rosse
Wolf-
Rayet
Ipergiganti
Gialle
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Una stella di classe B V (o stella azzurra di sequenza principale o stella B V, in passato nana bianco-azzurra) è una stella di sequenza principale (ovvero che nel proprio nucleo fonde l'idrogeno in elio) di classe spettrale B e classe di luminosità V (5 in numeri romani).
Tali stelle hanno una massa compresa tra 2 e 16 masse solari e temperature superficiali comprese tra 10 000 e 30 000 K.[1]
A questa categoria stellare appartiene un numero cospicuo di astri, tra cui Regolo, Algol A e Spica B.[2]
Note |
^ G. M. H. J. Habets, J. R. W. Heintze, Empirical bolometric corrections for the main-sequence, in Astronomy and Astrophysics Supplement, nº 46, novembre 1981, pp. 193–237.
^ SIMBAD, entries on Regulus and Algol A, accessed June 19, 2007.
Voci correlate |
- Stella di classe O V
- Stella di classe A V
- Stella di classe F V
- Nana gialla
- Nana arancione
Nana rossa
- Nana blu (fase evolutiva)
Altri progetti |
Wikimedia Commons contiene immagini o altri file su stella di classe B V
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