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IC 2560 (Spiral Galaxy)


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IC 2560
Spiral Galaxy (渦巻銀河)
Gx SBb

別名 (Other names)
PGC 29993, ESO 375-4, MCG -5-25-1

明るさ (Brightness)
11.7等級

星座 (Constellation)
ポンプ座 (Ant) (Antlia)


距離 (Distance)
1億1,000万光年 (110 million light-years)

IC 2560 is a spiral galaxy located 110 million light years from the Earth in the constellation Antlia.

IC 2560 (Spiral Galaxy) : Picture

IC 2560 (Spiral Galaxy)
IC 2560 (Spiral Galaxy)
(C) ESA/Hubble & NASA, Acknowledgement: Nick Rose
Lying over 110 million light-years away from Earth in the constellation of Antlia is the spiral galaxy IC 2560, shown here in an image from NASA/ESA Hubble Space Telescope. At this distance it is a relatively nearby spiral galaxy, and is part of the Antlia cluster — a group of over 200 galaxies held together by gravity. This cluster is unusual; unlike most other galaxy clusters, it appears to have no dominant galaxy within it.

In this image, it is easy to spot IC 2560's spiral arms and barred structure. This spiral is what astronomers call a Seyfert-2 galaxy, a kind of spiral galaxy characterised by an extremely bright nucleus and very strong emission lines from certain elements — hydrogen, helium, nitrogen, and oxygen. The bright centre of the galaxy is thought to be caused by the ejection of huge amounts of super-hot gas from the region around a central black hole.

There is a story behind the naming of this quirky constellation — Antlia was originally named antlia pneumatica by French astronomer Abbé Nicolas Louis de Lacaille, in honour of the invention of the air pump in the 17th century.

IC 2560
IC 2560 (Spiral Galaxy)
(C) NASA/ESA/Hubble
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