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.

Crédit:

ESO

À propos de l'image

Identification:eso0128e
Type:Observation
Date de publication:14 août 2001
Communiqués de presse en rapport:eso0128
Taille:800 x 627 px

À propos de l'objet

Nom:NGC 1808, Spectrum
Type:Local Universe : Galaxy : Type : Spiral
Distance:40 million années lumière
Catégorie:Galaxies

Formats des images

Grand JPEG
122,8 Kio
JPEG taille écran
140,6 Kio

Fonds d'écran

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

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Infrarouge
Near-IR
2.3 μmVery Large Telescope
ISAAC