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Notable examples of hypergiants include the Pistol Star, a blue hypergiant located close to the Galactic Center and one of the most luminous stars known; Rho Cassiopeiae, a yellow hypergiant that is one of the brightest to the naked eye; and Mu Cephei (Herschel's "Garnet Star"), one of the largest and brightest stars known.
Hypergiant is an Austin, Texas based technology company, [5] founded in February 2018, [4] and currently headed by CEO Mike Betzer. [ 3 ] [ 6 ] The company develops artificial intelligence (AI) products, [ 7 ] focused on its CommandCenter Platform.
Rigel and the IC 2118 nebula which it illuminates.. It was once believed that blue supergiants originated from a "feeding" with the interstellar medium when stars passed through interstellar dust clouds, [11] [8] although the current consensus is that blue supergiants are evolved high-mass stars, a natural consequence of stellar evolution, larger and more luminous than main-sequence stars.
Cygnus OB2 #12 is an extremely luminous blue hypergiant with an absolute bolometric magnitude (all electromagnetic radiation) of −10.9, among the most luminous stars known in the galaxy. This makes the star nearly two million times more luminous than the Sun, although estimates were even higher when the star was first discovered.
A yellow hypergiant star, similar to V382 Carinae, that is also visible to the naked eye. CW Leonis: 560 [78] L/T eff: The nearest carbon star. V509 Cassiopeiae: 511 ± 112 [42] AD A variable yellow hypergiant whose size varied from around 680 R ☉ in 1950–1970 to 910 R ☉ in 1977, and later decreased to 390 R ☉ in the 1990s. [79] V382 ...
An example of the nebulae that can result is IRAS 17163-3907, known as the Fried Egg, which has expelled several solar masses of material in just a few hundred years. [29] The yellow hypergiant is an expected phase of evolution as the most luminous red supergiants evolve bluewards, but they may also represent a different sort of star.
Wray 17-96 (unusual hypergiant in the gap between the two semi-stable LBV regions) Pistol Star (once thought to be the most luminous star in the galaxy) LBV 1806-20 (one of the most luminous stars known) Sanduleak -69° 202 (the star that exploded as SN 1987A) Cygnus OB2-12 (blue hypergiant and one of the most luminous stars known) HD 80077 ...
Known examples of type Iax supernovae include: the historical supernova SN 1181, SN 1991T, SN 1991bg, SN 2002cx, and SN 2012Z. The supernova SN 1181 is believed to be associated with the supernova remnant Pa 30 and its central star IRAS 00500+6713 , which is the result of a merger of a CO white dwarf and an ONe white dwarf.