AGC 198691
| AGC 198691 | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Leo Minor |
| Right ascension | 09h 43m 32.43s |
| Declination | +33° 26′ 58″ |
| Distance | 41.4+5.5 −11.1 Mly (12.7+1.7 −3.4 Mpc)[1] |
| Characteristics | |
| Type | dG |
| Mass | 10×106 M☉ |
| Apparent size (V) | 3 × 4 arcsec |
| Other designations | |
| Leoncino | |
AGC 198691 is a small galaxy with one of the smallest known metallicities.[1] It has a nickname of Leoncino as it is near Leo Minor.[2] The galaxy appears blue due to the presence of several bright blue stars. There is also an HII region present that contains oxygen.[3] It is important as an indicator of the kind of galaxies first formed in the Universe.[4]
References
[edit]- ^ a b Aver, Erik; Berg, Danielle A.; Hirschauer, Alec S.; Olive, Keith A.; Pogge, Richard W.; Rogers, Noah S J.; Salzer, John J.; Skillman, Evan D. (2021). "A comprehensive chemical abundance analysis of the extremely metal poor Leoncino Dwarf galaxy (AGC 198691)". Monthly Notices of the Royal Astronomical Society. 510: 373–382. arXiv:2109.00178. doi:10.1093/mnras/stab3226.
- ^ Aron, Jacob (21 May 2016). "The galaxy that time forgot". New Scientist. 230 (3074): 12.
- ^ Nowakowski, Tomasz (16 March 2016). "Astronomers discover the most metal-poor galaxy in the local universe". phys.org. Retrieved 8 June 2016.
- ^ Hirschauer, Alec S.; Salzer, John Joseph; Cannon, John M.; Skillman, Evan D. (1 January 2016). "The Extremely Metal-Poor Dwarf Galaxy AGC 198691". American Astronomical Society. 227: 136.06. Bibcode:2016AAS...22713606H.
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