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A blue supergiant (BSG) is a hot, luminous star, often referred to as an OB supergiant. They are usually considered to be those with luminosity class I and spectral class B9 or earlier, [1] although sometimes A-class supergiants are also deemed blue supergiants. [2] [3] [4]
This is a list of the nearest supergiant stars to Earth, located at a distance of up to 1,100 light-years (340 parsecs) from Earth. Some of the brightest stars in the night sky, such as Rigel and Antares, are in the list.
The number of post-main sequence blue supergiants is greater than those expected from theoretical models, leading to the "blue supergiant problem". [23] The relative numbers of blue, yellow, and red supergiants is an indicator of the speed of stellar evolution and is used as a powerful test of models of the evolution of massive stars. [24]
B-type supergiants are supergiant (luminosity class I) stars of spectral type B. Wikimedia Commons has media related to Blue supergiants . Pages in category "B-type supergiants"
Massive stars also continue to expand as hydrogen shell burning progresses, but they do so at approximately constant luminosity and move horizontally across the HR diagram. In this way they can quickly pass through blue giant, bright blue giant, blue supergiant, and yellow supergiant classes, until they become red supergiants.
The blue half-ring centered near the left edge represents the orbit of Neptune, the outermost planet of the Solar System. Stars with an initial mass above about 25 M ☉ quickly move away from the main sequence and increase somewhat in luminosity to become blue supergiants. They cool and enlarge at approximately constant luminosity to become a ...
Type-B stars have a Class B spectral type, giving them a blue-white color. Subcategories. ... B-type supergiants (63 P) B-type bright giants (32 P)
Supergiants are stars of luminosity class I. Luminosity class Ib is for normal supergiants; Luminosity class Ia is for bright supergiants; Luminosity class Iab is for ...