Draft:KK 246
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Last edited by Deepak Purti (talk | contribs) 34 days ago. (Update) |
| ESO 461-36 | |
|---|---|
.jpg) "Stellar Glitter in a Field of Black" The galaxies visible in this Hubble image are actually beyond the void, and instead form part of other galaxy clusters.[1] | |
| Observation data (J2000 epoch) | |
| Constellation | Sagittarius[2] |
| Right ascension | 20h 03m 57.4s[3] |
| Declination | −31° 40′ 53″[3] |
| Redshift | 0.001429[3] |
| Heliocentric radial velocity | 428.2 km/s[3] |
| Characteristics | |
| Type | dIrr[4] |
| Other designations | |
| KK 246, LEDA 64054, HIPASS J2003-31[2] | |
KK 246, also known as ESO 461-036 or ESO 461-G036, is a dwarf irregular galaxy residing within the Local Void. This galaxy is the only one confirmed to be located in the Local Void (while 15 others have been tentatively identified),[5] presenting a challenge to ΛCDM which overpopulates the voids.[6]
It has been identified as the most isolated dwarf galaxy known in the Local Volume, with no galaxies discovered within 3 Mpc (9.8 Mly).[7]
Its distance was estimated to be 7.8 ± 0.6 Mpc (25.4 ± 2.0 Mly) by Karachentsev et al. (2006) using the TRGB method, which was deemed to be too high by Tully et al. (2008) because of the reddening estimate used.
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References
[edit]- ^ "Stellar Glitter in a Field of Black". European Space Agency. 2020-05-18. Retrieved 2024-04-07.
- ^ a b Lazaro, Enrico de (2020-05-18). "Hubble Spots Lonely Dwarf Galaxy | Sci.News". Sci.News: Breaking Science News. Archived from the original on 2024-04-07. Retrieved 2024-04-07.
- ^ a b c d "ESO 461-36". simbad.u-strasbg.fr. Retrieved 2024-04-07.
- ^ Kirby, Emma M.; Jerjen, Helmut; Ryder, Stuart D.; Driver, Simon P. (2008-10-07). "DEEP NEAR-INFRARED SURFACE PHOTOMETRY OF 57 GALAXIES IN THE LOCAL SPHERE OF INFLUENCE". The Astronomical Journal. 136 (5): 1866–1888. doi:10.1088/0004-6256/136/5/1866. ISSN 0004-6256.
- ^ "Hubble Sees Stellar Glitter in a Cosmic Void". NASA. 2020-05-22. Retrieved 2024-04-07.
- ^ Kreckel, K.; Peebles, P. J. E.; van Gorkom, J. H.; van de Weygaert, R.; van der Hulst, J. M. (2011-05-12). "KK 246: A DWARF GALAXY WITH AN EXTENDED H I DISK IN THE LOCAL VOID". The Astronomical Journal. 141 (6): 204. doi:10.1088/0004-6256/141/6/204. ISSN 0004-6256.
- ^ Nicholls, David C.; Jerjen, Helmut; Dopita, Michael A.; Basurah, Hassan (2013-12-13). "NEBULAR METALLICITIES IN TWO ISOLATED LOCAL VOID DWARF GALAXIES". The Astrophysical Journal. 780 (1): 88. doi:10.1088/0004-637X/780/1/88. ISSN 0004-637X.