IC 2560

Coordinates: Sky map 10h 16m 18.666s, −33° 33′ 49.85″

IC 2560
A spiral in the Air Pump
IC 2560's spiral arms and barred structure
Observation data (J2000 epoch)
Right ascension10h 16m 18.666s[1]
Declination−33° 33′ 49.85″[1]
Helio radial velocity2864 km/s[1]
Distance110 million ly[2]
Apparent magnitude (V)13.31[1]
Apparent magnitude (B)12.53[1]
Apparent size (V)2.790 x 1.060[1]
Other designations
INTREF 409, NVSS J101618-333350, [VV2000c] J101619.3-333359, AGC 26999, IRAS 10140-3318, PSCz Q10140-3318, [VV2003c] J101619.3-333359, 6dFGS gJ101618.7-333350, IRAS F10140-3318, SGC 101405-3318.9, [VV2006c] J101619.3-333359, ESO-LV 375-0040, LEDA 29993, [CHM2007] LDC 729 J101618.66-3333498, [VV2010c] J101619.3-333359, ESO 375-4, 2MASX J10161866-3333498, [HB91] 1014-333, [VV98c] J101619.3-333359, HIPASS J1016-33, MCG-05-25-001, [TP95] IC 2560 1

IC 2560 is a spiral galaxy lying over 110 million light-years away from Earth in the constellation of Antlia. It has a distinct bar structure in the center. The supermassive black hole at the core has a mass of 4.4+4.4
×106 M


  1. ^ a b c d e f g h "Search Results for IC 2560". Astronomical Database. SIMBAD. Retrieved 6 September 2013.
  2. ^ "A spiral in the Air Pump". ESA/Hubble Picture of the Week. Retrieved 6 September 2013.
  3. ^ Graham, Alister W. (November 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013.
Seyfert galaxy

Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material.Seen in visible light, most Seyfert galaxies look like normal spiral galaxies, but when studied under other wavelengths, it becomes clear that the luminosity of their cores is of comparable intensity to the luminosity of whole galaxies the size of the Milky Way.Seyfert galaxies are named after Carl Seyfert, who first described this class in 1943.

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