Caldwell 36
NGC 4559 (also known as Caldwell 36) is an intermediate spiral galaxy with a weak inner ring structure in the constellation Coma Berenices. Distance estimates for NGC 4559 range from about 28 million light-years to 31 million light-years, averaging about 29 million light-years. It was discovered on 11 April 1785 by German-British astronomer William Herschel.
NGC 4559 is a member of the Coma I Group.
Supernova
One supernova has been recorded in NGC 4559: SN 1941A (Type II-L, mag. 13.2) was discovered by Rebecca Jones on 24 February 1941, and after checking previous photographs of the galaxy, it was determined that the supernova was visible starting 5 February 1941.
Luminous Blue Variable
NGC 4559 is home to the luminous blue variable AT 2016blu, which experiences repeated supernova-like outbursts. First observed in January 2012, it burst out again in 2014, 2016, 2017, 2018, 2019, 2020, 2021, 2022, and 2024.
See also
- Messier 99 – a similar spiral galaxy
Gallery
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Hubble Space Telescope showing the inner structure -
Hubble image of IC 3550, located in NGC 4559.
References
- ^ "NASA/IPAC Extragalactic Database". Results for NGC 4559. Retrieved 2020-12-21.
- ^ Seligman, Courtney. "NGC 4559". Celestial Atlas. Retrieved 15 August 2024.
- ^ Sandage, A.; Tammann, G.A. (1975). "Steps toward the Hubble constant. V - The Hubble constant from nearby galaxies and the regularity of the local velocity field". The Astrophysical Journal. 196: 313–328. Bibcode:1975ApJ...196..313S. doi:10.1086/153413. ISSN 0004-637X.
- ^ Gregory, S.A.; Thompson, L. A. (1977). "The Coma I Galaxy Cloud". The Astrophysical Journal. 213: 345–350. Bibcode:1977ApJ...213..345G. doi:10.1086/155160. ISSN 0004-637X.
- ^ "SN 1941A". Transient Name Server. IAU. Retrieved 14 August 2024.
- ^ Elis, Stromgren (24 April 1941). "Circular No. 861". Central Bureau for Astronomical Telegrams. Observatory Copenhagen. Retrieved 27 November 2024.
- ^ Bishop, David (6 July 2021). "LBV 2016blu in NGC 4559". rochesterastronomy.org. Retrieved 9 August 2021.
- ^ Aghakhanloo, Mojgan; Smith, Nathan; Milne, Peter; Andrews, Jennifer E.; Van Dyk, Schuyler D.; Filippenko, Alexei V.; Jencson, Jacob E.; Lau, Ryan M.; Sand, David J.; Wyatt, Samuel; Zheng, WeiKang (2022). "Recurring outbursts of the supernova impostor AT 2016blu in NGC 4559". Monthly Notices of the Royal Astronomical Society. 526 (1): 456. arXiv:2212.09708. Bibcode:2023MNRAS.526..456A. doi:10.1093/mnras/stad2702.
External links
Media related to NGC 4559 at Wikimedia Commons- NGC 4559 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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