(B, B-class star)
(star with spectral characteristics of around 10000-30000 K)
A B-type star is a star within the B-class,
a spectral class indicating stars with neutral helium
and moderate hydrogen absorption lines,
a blue-white color,
and a surface temperature in the general range of 10,000 K to 30,000 K.
The spectral energy distribution peaks in the ultraviolet.
Main sequence stars of this class are on the order of
10 solar masses, 5 times solar radius, and hundreds to thousands
of times as bright as the Sun.
Such main sequence stars
burn their hydrogen on the order of a hundred million years.
Characteristics of B-type main sequence stars:
Blue giants (and blue supergiants) are very hot giant stars,
which can fall in this temperature range and be
classified as B-type stars. Example B-type stars are
Achernar, Algol, Beta Centauri (pair of giant stars),
and Rigel (includes a supergiant).
(star type,spectral class)
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Referenced by pages:
Herbig AeBe star (HAeBe)
red-giant branch (RGB)
star formation rate (SFR)
shell star (sh)
young stellar object (YSO)