Mu Cephei
Mu Cephei, also known as Herschel's Garnet Star due to its red, garnet-like color, is a red hypergiant star in the Cepheus constellation. With a radius between 1,260 and 1,420 solar radii,[1][2] or a diameter between 1.7 and 2 billion kilometers, it is one of the largest stars known. This means Mu Cephei is twice the size of the more famous star Betelgeuse.[3] Mu Cephei is also 269,000 times brighter than the Sun.[4] Mu Cephei is also the "prototype" of the semiregular variable star type.
Artist's picture
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Mu Cephei Media
1785 portrait of William Herschel
Zooming to the μ Cep (Garnet star) in the constellation Cepheus.
Mu Cephei (circled) as can be seen in binoculars. The bright star on the right is Alderamin (Alpha Cephei).
Mu Cephei and surrounding nebulosity, imaged at H-alpha and OIII wavelengths (north is towards top left)
A visual band light curve for Mu Cephei, adapted from Brelstaff et al. (1997)
Size comparison of μ Cephei and the Sun.
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Related pages
References
- ↑ Lua error in Module:Citation/CS1/Identifiers at line 630: attempt to index field 'known_free_doi_registrants_t' (a nil value).
- ↑ Emily M. Levesque1 et al 2005. "The effective temperature scale of galactic red supergiants: cool, but not as cool as we thought" Astrophysical Journal 628, 2. [1]
- ↑ Lua error in Module:Citation/CS1/Identifiers at line 630: attempt to index field 'known_free_doi_registrants_t' (a nil value).
- ↑ Davies, Ben; Beasor, Emma R. (2020-03-21). "The 'Red Supergiant Problem': the upper luminosity boundary of type-II supernova progenitors". Monthly Notices of the Royal Astronomical Society. 493 (1): 468–476. arXiv:2001.06020. doi:10.1093/mnras/staa174. ISSN 0035-8711.
