Pisces I (dwarf galaxy)

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Pisces I Dwarf Galaxy
Observation data
ConstellationPisces
Other designations
Pisces Overdensity,[1] Psc I,[2] PGC 3792,[3] LEDA 3792[2]
See also: Galaxy, List of galaxies

Pisces I, also known as Psc I or the Pisces Overdensity is a clump of stars in the Milky Way's galactic halo, which may actually be a disrupted dwarf spheroidal galaxy.[4] It is situated in the Pisces constellation and was discovered in 2009 by analysis of distribution of RR Lyrae stars in the data recorded by the Sloan Digital Sky Survey's data.[1] The galaxy is located at the distance of about around 80,000 from the Sun and moves towards it with a speed of about 75 kilometers per second.[5]

References[edit]

  1. 1.0 1.1 Watkins, L. L. et al. (2009), "Substructure revealed by RR Lyraes in SDSS Stripe 82", Monthly Notices of the Royal Astronomical Society 398 (4): 1757–70, arXiv:0906.0498, Bibcode 2009MNRAS.398.1757W, doi:10.1111/j.1365-2966.2009.15242.x.
  2. 2.0 2.1 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  3. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  4. Belokurov, V. et al. (2010), "Big fish, small fish: Two New Ultra-Faint Satellites of the Milky Way", The Astrophysical Journal Letters 712: L103–106, arXiv:1002.0504, Bibcode 2010ApJ...712L.103B, doi:10.1088/2041-8205/712/1/L103.
  5. Kollmeier, Juna A. et al. (2009), "Spectroscopic Confirmation of the Pisces Overdensity", The Astrophysical Journal Letters 705 (2): L158–L162, arXiv:0908.1381, Bibcode 2009ApJ...705L.158K, doi:10.1088/0004-637X/705/2/L158.

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