UKS 2323-326

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UKS 2323-326
Local Group uk.png
UKS  2323-326 (not shown) is part of the Local Group, the Sculptor Group to be more specific.
Observation data
Right ascension 23h 23m 47.6s
Declination −32° 39′ 57″
Distance 4.2 million ly
Characteristics
Type Dwarf irregular galaxy
Number of stars~6x10^5
Other designations
UGCA 4383, MCG -05-55-012, PGC 71431 [1]

UKS 2323-326 is a very low mass and faint dwarf irregular galaxy located in the Local Group at a distance of 1.3 mpc from Earth. [2] The galaxy is a member of the Sculptor Group. [3] The galaxy has a young stellar population that recently (~100 mya [3] ) formed defined red giant branch (RGB) stars but no significant amount of H ll emissions. It also has no detected hot dust or polycyclic aromatic hydrocarbons. [4] [5]

Structure and composition

The galaxy shape is amorphous but surprisingly circular. The central region of UKS 2323-326 has a concentration of several tens of bright stars. Farther from the center of the galaxy are fewer bright stars and more faint stars. [3] There are a number of red giant branch (AGB) stars that exist in UKS 2323-326 and a lack of H II regions. [4]

References

  1. ↑ "UKS 2323-326". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2025-04-21.
  2. ↑ "UKS 2323-326". spider.seds.org. Retrieved 2025-04-07.
  3. 1 2 3 Lee, Myung Gyoon; Byun, Yong-Ik (1999-08-01). "Stellar Populations of the Dwarf Galaxy UKS 2323-326 in the Sculptor Group". The Astronomical Journal. 118 (2): 817–825. arXiv: astro-ph/9905061 . Bibcode:1999AJ....118..817L. doi:10.1086/300989. ISSN   0004-6256.
  4. 1 2 Gullieuszik, M.; Greggio, L.; Held, E. V.; Moretti, A.; Arcidiacono, C.; Bagnara, P.; Baruffolo, A.; Diolaiti, E.; Falomo, R.; Farinato, J.; Lombini, M.; Ragazzoni, R.; Brast, R.; Donaldson, R.; Kolb, J. (2008-05-01). "Resolving stellar populations outside the Local Group: MAD observations of UKS 2323-326". Astronomy & Astrophysics. 483 (1): L5 –L8. arXiv: 0803.3728 . Bibcode:2008A&A...483L...5G. doi:10.1051/0004-6361:200809631. ISSN   0004-6361.
  5. ↑ Longmore, A. J.; Hawarden, T. G.; Webster, B. L.; Goss, W. M.; Mebold, Ulrich (1978-05-01). "Two new dwarf galaxies in the Local Group: UKS 1927 – 177 and UKS 2323 – 326". Monthly Notices of the Royal Astronomical Society. 183 (1): 97P –100P. doi: 10.1093/mnras/183.1.97P . ISSN   0035-8711.
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