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.

Bildnachweis:

ESO

Über das Bild

ID:potw1008a
Typ:Beobachtung
Veröffentlichungsdatum:22. Februar 2010 10:00
Größe:1927 x 1935 px

Über das Objekt

Name:NGC 1427A
Typ:Local Universe : Galaxy : Type : Irregular
Local Universe : Galaxy : Size : Dwarf
Entfernung:65 Million Lichtjahre
Constellation:Eridanus
Kategorie:Galaxies

Bildformate

Großes JPEG
689,5 KB

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Bildschirm-Hintergrundbilder

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Koordinaten

Position (RA):3 40 9.36
Position (Dec):-35° 37' 27.97"
Field of view:6.44 x 6.47 arcminutes
Orientierung:Die Nordrichtung liegt 89.9° links zur Vertikale

Farben & Filter

SpektralbereichTeleskop
Optisch
B
Very Large Telescope
FORS1
Optisch
V
Very Large Telescope
FORS1
Infrarot
I
Very Large Telescope
FORS1
Optisch
H-alpha
Very Large Telescope
FORS1
Ultraviolett
U
Very Large Telescope
FORS1

 

Siehe auch