KKs 3

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KKs 3
Dwarf Galaxy KKs 3.jpg
KKs 3 is the dark patch in the centre of this Hubble Space Telescope image
Observation data (J2000 epoch)
Constellation Hydrus
Right ascension 02h 24m 44.4s [1]
Declination −73° 30′ 51″ [1]
Distance 6.9  Mly (2.12  Mpc) [2]
Apparent magnitude  (V)14.47 [3]
Absolute magnitude  (V)−12.3 [2]
Characteristics
Type dSph [4]
Size4.9  kly (1.5  kpc) [2]
Other designations
LEDA  9140, [5] PGC  9140, [6] SGC  022423-7344.3, [5] SGC  0224.3-7345, [6] KKs 3

KKs 3 is a dwarf galaxy in the Local Group. It is unusual because it is gas poor and very isolated in the halo of the local group. KKs 3 is about 7 million light years away from Earth. It is categorised as a dwarf spheroidal dSph galaxy. [4] The mass of KKs 3 is 2.3 × 107M☉ (23 million times the mass of the Sun) with a blue absolute magnitude of −10.8. [1] Three-quarters of its stars are over 12 billion years old. [1] Coordinates are R.A. = 02h 24m 44.4s, Dec. = −73°30′51". [1]

It was discovered in December 2014 as a result of the image taken in August by the Hubble Space Telescope. [7]

References

  1. 1 2 3 4 5 I. D. Karachentsev; L. N. Makarova; D. I. Makarov; R. B. Tully; et al. (6 November 2014). "A new isolated dSph galaxy near the Local Group". Monthly Notices of the Royal Astronomical Society Letters. 447 (1) (published 11 February 2015): L85–L89. arXiv: 1411.1674 . Bibcode:2015MNRAS.447L..85K. doi: 10.1093/mnrasl/slu181 .
  2. 1 2 3 Sharina, M. E.; Makarova, L. N.; Makarov, D. I. (2018). "Gradients of Metallicity and Age of Stars in the Dwarf Spheroidal Galaxies KKS 3 and ESO 269-66". Astrophysics. 61 (4): 435–443. arXiv: 2311.05990 . Bibcode:2018Ap.....61..435S. doi:10.1007/s10511-018-9548-3.
  3. ↑ Sharina, M. E; Shimansky, V. V; Kniazev, A. Y (2017). "Nuclei of dwarf spheroidal galaxies KKs 3 and ESO 269−66 and their counterparts in our Galaxy". Monthly Notices of the Royal Astronomical Society. 471 (2): 1955. arXiv: 1706.07344 . Bibcode:2017MNRAS.471.1955S. doi: 10.1093/mnras/stx1605 .
  4. 1 2 Massey, Robert (22 December 2014). "The Milky Way's new neighbour" . Retrieved 23 December 2014.
  5. 1 2 "LEDA 9140 – Galaxy". SIMBAD . Retrieved 25 December 2014.
  6. 1 2 "Object No. 1 – SGC 0224.3-7345". NASA/IPAC Extragalactic Database. Retrieved 25 December 2014.
  7. ↑ Yeager, Ashley (22 December 2014). "Hubble telescope spots our galaxy's newest neighbor" . Retrieved 23 December 2014.
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