A dwarf in the Fornax cluster

In this dazzling image, the galaxy NGC 1427A is seen as it travels through the Fornax cluster of galaxies, to which it belongs. NGC 1427A is an example of a dwarf irregular galaxy, a type of galaxy that is significantly less bright than regular galaxies and characterised by a peculiar shape. In this particular case, the shape of the galaxy has been forged by its rapid, upwards motion through the cluster: with a speed of two million kilometres per hour relative to the cluster, NCG 1427A is being torn apart and will eventually be disrupted.

The interaction with the Fornax cluster has led to the birth of many stars, seen here as a boomerang-shaped region of young, glowing stars in the galaxy. NGC 1427A exhibits a striking resemblance to one of our galactic neighbours, the Large Magellanic Cloud, which has undergone similar episodes of star formation, triggered by its interaction with the Milky Way.

This image has been obtained using the FORS instrument mounted on one of the 8.2-metre telescopes of ESO’s Very Large Telescope on top of Cerro Paranal, Chile. It combines data acquired through four broadband filters (U, B, V, I) and a narrowband one (H-alpha). 

North is on the left and West is up. The field of view is 7 arcminutes.

Crédit:

ESO

À propos de l'image

Identification:potw1008a
Type:Observation
Date de publication:22 février 2010 10:00
Taille:1927 x 1935 px

À propos de l'objet

Nom:NGC 1427A
Type:Local Universe : Galaxy : Type : Irregular
Local Universe : Galaxy : Size : Dwarf
Distance:65 million années lumière
Constellation:Eridanus
Catégorie:Galaxies

Formats des images

Grand JPEG
689,5 Kio
JPEG taille écran
174,1 Kio

Zoomable


Fonds d'écran

1024x768
165,9 Kio
1280x1024
261,1 Kio
1600x1200
384,0 Kio
1920x1200
478,0 Kio
2048x1536
580,3 Kio

Coordinates

Position (RA):3 40 9.36
Position (Dec):-35° 37' 27.97"
Field of view:6.44 x 6.47 arcminutes
Orientation:North is 89.9° left of vertical

Couleurs & filtres

DomaineTélescope
Visible
B
Very Large Telescope
FORS1
Visible
V
Very Large Telescope
FORS1
Infrarouge
I
Very Large Telescope
FORS1
Visible
H-alpha
Very Large Telescope
FORS1
Ultraviolet
U
Very Large Telescope
FORS1

 

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