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NGC 1531 and NGC 1532 (Interacting Galaxy)


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NGC 1531 and NGC 1532
Interacting Galaxy (相互作用銀河)

名前
(Name)
分類 明るさ
(Brightness)
別名
(Other names)
NGC 1531 Gx E-S0 11.7 PGC 14635, ESO 359-26, MCG -5-11-1
NGC 1532 Gx SBb 9.8 PGC 14638, ESO 359-27, MCG -5-11-2

星座 (Constellation)
エリダヌス座 (Eri) (Eridanus)

距離 (Distance)
5,000万光年 (50 million light-years)

NGC 1531 and NGC 1532 is an interacting galaxy located 50 million light years from the Earth in the constellation Eridanus.

NGC 1531 and NGC 1532 (Interacting Galaxy) : Picture

Galaxies in the River
Galaxies in the River
(C) Martin Pugh
Large galaxies grow by eating small ones. Even our own galaxy practices galactic cannibalism, absorbing small galaxies that get too close and are captured by the Milky Way's gravity. In fact, the practice is common in the universe and illustrated by this striking pair of interacting galaxies from the banks of the southern constellation Eridanus. Located over 50 million light years away, the large, distorted spiral NGC 1532 is seen locked in a gravitational struggle with dwarf galaxy NGC 1531, a struggle the smaller galaxy will eventually lose. Seen edge-on, spiral NGC 1532 spans about 100,000 light-years. Nicely detailed in this sharp image, the NGC 1532/1531 pair is thought to be similar to the well-studied system of face-on spiral and small companion known as M51.

Galaxies in the River
Galaxies in the River
(C) Robert Gendler, Jan-Erik Ovaldsen, Allan Hornstrup, IDA Image data: ESO/Danish 1.5m telescope at La Silla, Chile - 2008

NGC 1531/2: Interacting Galaxies
NGC 1531/2: Interacting Galaxies
(C) T. Rector (U. Alaska Anchorage), Gemini Obs., AURA, NSF, NASA
This dramatic image of an interacting pair of galaxies was made using 8-meter Gemini South telescope at Cerro Pachon, Chile. NGC 1531 is the background galaxy with a bright core just above center and NGC 1532 is the foreground spiral galaxy laced with dust lanes. The pair is about 55 million light-years away in the southern constellation Eridanus. These galaxies lie close enough together so that each feels the influence of the other's gravity. The gravitational tug-of-war has triggered star formation in the foreground spiral as evidenced by the young, bright blue star clusters along the upper edge of the front spiral arm. Though the spiral galaxy in this pair is viewed nearly edge-on, astronomers believe the system is similar to the face-on spiral and companion known as M51, the Whirlpool Galaxy.

NGC 1531/2: Interacting Galaxies
NGC 1531/2: Interacting Galaxies
(C) W. Keel, R. White III, and C. Conselice (University of Alabama)

NGC1531 and NGC1532 NGC1531 and NGC1532
NGC1531 and NGC1532
(C) Martin Pugh
NGC1531 and NGC1532
(C) ESO
NGC1531 and NGC1532 NGC1531 and NGC1532
NGC1531 and NGC1532
(C) NASA
NGC1531 and NGC1532
(C) W. Keel, R. White III, and C. Conselice
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NGC 1531 and NGC 1532 (Interacting Galaxy) : Movie

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