Andromeda XIX is a satellite galaxy of the Andromeda Galaxy (M31), a member of the Local Group, like the Milky Way Galaxy.[3] Andromeda XIX is considered "the most extended dwarf galaxy known in the Local Group",[4] and has been shown to have a half-light radius of 1.7 kiloparsec (kpc).[4] It was discovered by the Canada–France–Hawaii Telescope, and is thought to be a dwarf galaxy.
As with other dwarf galaxies, Andromeda XIX is not producing new stars: 90% of its star formation occurred over 9 billion years ago. However, compared to dwarf galaxies of similar mass Andromeda XIX is extremely diffuse, like Antlia II.[2]
^ abcd"Results for ANDROMEDA XIX". NASA/IPAC Extragalactic Database. Retrieved January 15, 2017.
^ abcdCollins, Michelle L M.; Williams, Benjamin F.; Tollerud, Erik J.; Balbinot, Eduardo; Gilbert, Karoline M.; Dolphin, Andrew (2022). "A detailed star formation history for the extremely diffuse Andromeda XIX dwarf galaxy". Monthly Notices of the Royal Astronomical Society. 517 (3): 4382–4388. arXiv:2209.12912. Bibcode:2022MNRAS.517.4382C. doi:10.1093/mnras/stac2794.
^"Chart (Local Galaxies)". University of Northern Iowa. Retrieved 18 April 2012.
^ abMcConnachie, Alan W.; Huxor, Avon; Martin, Nicolas F.; Irwin, Mike J.; Chapman, Scott C.; Fahlman, Gregory; Ferguson, Annette M. N.; Ibata, Rodrigo A.; et al. (1 December 2008). "A Trio of New Local Group Galaxies with Extreme Properties". The Astrophysical Journal. 688 (2): 1009–1020. arXiv:0806.3988. Bibcode:2008ApJ...688.1009M. doi:10.1086/591313. S2CID 16950090. Retrieved 18 April 2012.
AndromedaXIX is a satellite galaxy of the Andromeda Galaxy (M31), a member of the Local Group, like the Milky Way Galaxy. AndromedaXIX is considered...
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