ISAAC spectrum of the central region of NGC 1808

This image is a reproduction of a long-slit ISAAC spectrum of the central region of the active galaxy NGC 1808. It is in the 2.3 µm spectral region and the wavelength increases towards right. Several strong, vertical bands are seen; they are caused by CO-molecules in the atmospheres of the stars in this area. The bright band at the centre corresponds to the nucleus of the galaxy within which the central black hole is located. The characteristic S-shape is a result of the rotation of the stars around this centre, due to the Doppler effect.

Technical information: this image shows a raw, long-slit IR-spectrum in the 2.3 µm wavelength region, obtained with ISAAC along the major axis of this galaxy.

Källa:

ESO

Om bilden

ID:eso0128e
Typ:Observation
Publiceringsdatum:14 augusti 2001
Relaterade pressmeddelanden:eso0128
Storlek:800 x 627 px

Om objektet

Namn:NGC 1808, Spectrum
Typ:Local Universe : Galaxy : Type : Spiral
Avstånd:40 miljon ljusår
Kategori:Galaxies

Bildformat

Originalstorlek
292,6 kB
Stor jpeg
122,8 kB
Skärmstor jpeg
140,6 kB

Skrivbordsunderlägg

1024x768
168,1 kB
1280x1024
231,7 kB
1600x1200
293,2 kB
1920x1200
313,9 kB
2048x1536
398,1 kB

Färger och filter

BandVåglängdTeleskop
Infrarött
Near-IR
2.3 μmVery Large Telescope
ISAAC