Hypergiant | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Hypergiant


00:00:47 1 Origin and definition
00:01:06 2 Formation
00:02:06 3 Stability
00:04:53 4 Relationships with Ofpe, WNL, LBV, and other supergiant stars
00:07:37 5 Known hypergiants
00:11:03 5.1 Luminous blue variables
00:11:21 5.2 Blue hypergiants
00:12:59 5.3 Yellow hypergiants
00:13:12 5.4 Red hypergiants
00:13:36 6 See also
00:14:03 7 Notes



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SUMMARY
=======
A hypergiant (luminosity class 0 or Ia+) is among the very rare kinds of stars that typically show tremendous luminosities and very high rates of mass loss by stellar winds. The term hypergiant is defined as luminosity class 0 (zero) in the MKK system. However, this is rarely seen in the literature or in published spectral classifications, except for specific well-defined groups such as the yellow hypergiants, RSG (red supergiants), or blue B(e) supergiants with emission spectra. More commonly, hypergiants are classed as Ia-0 or Ia+, but red supergiants are rarely assigned these spectral classifications. Astronomers are interested in these stars because they relate to understanding stellar evolution, especially with star formation, stability, and their expected demise as supernovae.