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NGC 3783 (Spiral Galaxy)


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NGC 3783
Barred Spiral Galaxy (棒渦巻銀河)
Supermassive Black Hole (超大質量ブラックホール)
Gx SBa


別名 (Other names)

PGC 36101, ESO 378-14, MCG -6-26-4

明るさ (Brightness)

11.6等級


星座 (Constellation)
ケンタウルス座 (Cen) (Centaurus)

距離 (Distance)
1億3,700万光年 (137 million light-years)

NGC 3783 is a barred spiral galaxy located 137 million light years from the Earth in the constellation Centaurus.

NGC 3783 (Spiral Galaxy) : Picture

NGC 3783
Artist's impression of the surroundings of the supermassive black hole in NGC 3783
(C) ESO
This artist’s impression shows the surroundings of the supermassive black hole at the heart of the active galaxy NGC 3783 in the southern constellation of Centaurus. New observations using the Very Large Telescope Interferometer at ESO’s Paranal Observatory in Chile have revealed not only the torus of hot dust around the black hole but also a wind of cool material in the polar regions.

NGC 3783
Wide-field view of the region around galaxy NGC 3783
(C) ESO
This picture was created from images forming part of the Digitized Sky Survey 2. It shows the region of sky around the active galaxy NGC 3783 in the southern constellation of Centaurus. The galaxy is the face-on spiral right at the centre.

NGC 3783
The active galaxy NGC 3783 in the constellation of Centaurus
(C) ESO
This chart shows the constellation of Centaurus. Most of the stars that can be seen in a dark sky with the unaided eye are marked. The location of the galaxy NGC 3783 is indicated.

X-Ray Wind From NGC 3783
X-Ray Wind From NGC 3783
(C) PSU, NASA
A black hole is supposed to inexorably attract matter. But the intense radiation generated as material swirls and plunges into its high gravity field also heats up surrounding gas and drives it away. In fact, measurements made using this recent Chandra Observatory X-ray spectrum of active galaxy NGC 3783 reveal a wind of highly ionized atoms blowing away from the galaxy's suspected central black hole at a million miles per hour. Displayed in false color, the bright central spot is the X-ray image of NGC 3783 while the lines radiating away represent an X-ray spectrum of this source produced by Chandra's High Energy Transmission Grating (HETG). An X-ray spectrum is the analog to the rainbow spread of colors in a visible light spectrum. It represents a detailed, spread out image of X-ray colors or energies arising from the source. Ionized atoms of iron, magnesium, oxygen, nitrogen and other elements produce patterns of absorption at known X-ray energies. These patterns have been identified in the spectrum of NGC 3783 at slightly shifted energies and the measured shifts indicate the hot wind's velocity.
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NGC 3783 (Spiral Galaxy) : Movie

Outflow from active galaxy NGC 3783 (artist's impression)
This video shows an artist's impression of the dusty wind emanating from the black hole at the centre of galaxy NGC 3783. Astronomers knew that dust surrounded such supermassive black holes in a doughnut-shaped torus, but new observations using ESO's Very Large Telescope Interferometer now show that dust also lies in the polar regions. This material is pushed outwards by the black hole's radiation, forming a cool, dusty wind.
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