NGC 4999 is a barred spiral galaxy located in the constellation Virgo, first discovered February 24, 1786 by astronomer William Herschel.[3] The galaxy is noted as a particularly bright ultraviolet light source – it is believed that its notable bar structure suppresses star formation,[4] indicating this ultraviolet light may possibly be due to a quasi-stellar object.[5]

See also

References

  1. ^ a b c d e f "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu.
  2. ^ James, P. A.; Percival, S. M. (2018). "Star formation suppression and bar ages in nearby barred galaxies". Monthly Notices of the Royal Astronomical Society. 474 (3): 3101–3109. arXiv:1711.10537. Bibcode:2018MNRAS.474.3101J. doi:10.1093/mnras/stx2990.
  3. ^ "New General Catalog Objects: NGC 4950 - 4999". cseligman.com.
  4. ^ "Reference Lookup | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu.
  5. ^ "Reference Lookup | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu.
Allikas: Https://en.wikipedia.org/wiki/NGC_4999
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