B-type star

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 (SED) 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 tens-of-thousands 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 within this temperature range and within the B-class. Example B-type stars are Achernar, Algol, Beta Centauri (pair of giant stars), and Rigel (includes a supergiant).