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The most luminous known asymptotic giant branch star. [18] Widely recognised as being among the largest known stars. [19] NML Cygni < 1,350 +195 −229 [c] AD Surrounding dusty region is very complex making the radius hard to determine. [20] Stephenson 2 DFK 2 1,301 ± 285 [10] L/T eff: Another red supergiant, Stephenson 2 DFK 1 has an ...
Some red supergiants undergo blue loops where they temporarily increase in temperature before returning to the red supergiant state. This depends on the mass, rate of rotation, and chemical makeup of the star. While many red supergiants will not experience a blue loop, some can have several. Temperatures can reach 10,000K at the peak of the ...
Within any giant luminosity class, the cooler stars of spectral class K, M, S, and C, (and sometimes some G-type stars [13]) are called red giants. Red giants include stars in a number of distinct evolutionary phases of their lives: a main red-giant branch (RGB); a red horizontal branch or red clump; the asymptotic giant branch (AGB), although ...
Another noteworthy feature of red giants is that, unlike Sun-like stars whose photospheres have a large number of small convection cells (solar granules), red-giant photospheres, as well as those of red supergiants, have just a few large cells, the features of which cause the variations of brightness so common on both types of stars.
Damian Lillard is the only one going supernova these days. The Hubble Space Telescope revealed why nearby red giant star Betelgeuse became surprisingly dim late last year, according to a new study.
VY Canis Majoris is a candidate for a star in a second red supergiant phase, but this is mostly speculative and unconfirmed. [66] From this star CO emission is coincident with the bright KI shell in its asymmetric nebula. The star will produce either: a moderately luminous and long-lasting type IIn supernova (SN IIn) a hypernova; or a
NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant [4] or red supergiant (RSG) in the constellation Cygnus.It is possibly one of the largest known stars currently known, and is also possibly one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
This red giant star will, one day, explode as a supernova. Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. New examinations of this behemoth star ...