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A1689B11 is an extremely old spiral galaxy located in the Abell 1689 galaxy cluster in the Virgo constellation.[2] The disk of A1689B11 is cool and thin, yet it produced stars at thirty times the rate of the Milky Way. With a lookback time (the difference between the age of the universe now and the age of the universe at the time light left the galaxy) of 11 billion years in the concordance cosmology, A1689B11 is forming 2.6 billion years after the Big Bang. And its present comoving distance is about 19.4 billion light-years from the Earth. It is one of the most distant known spiral galaxies as of 2017.[3][1]
See also
- BX442, another old and distant spiral galaxy
- BRI 1335-0417, another old and distant spiral galaxy
References
- ^ a b c d e f g h Tiantian Yuan; Johan Richard; Anshu Gupta; Christoph Federrath; Soniya Sharma; Brent A. Groves; Lisa J. Kewley; Renyue Cen; Yuval Birnboim; David B. Fisher (30 October 2017). "The most ancient spiral galaxy: a 2.6-Gyr-old disk with a tranquil velocity field". The Astrophysical Journal. 850 (1): 61. arXiv:1710.11130. Bibcode:2017ApJ...850...61Y. doi:10.3847/1538-4357/aa951d. S2CID 119267114.
- ^ "[BBC2005] Source 11 -- Galaxy". 24 June 2018.
- ^ "The most ancient spiral galaxy confirmed". PhysOrg. 3 November 2017.
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