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.

Oikeudet:

ESO

Kuvasta

Tunnistus:potw1008a
Tyyppi:Havainto
Julkaisupäivä:22. helmikuuta 2010 10:00
Koko:1927 x 1935 px

Kohteesta

Nimi:NGC 1427A
Tyyppi:Local Universe : Galaxy : Type : Irregular
Local Universe : Galaxy : Size : Dwarf
Etäisyys:65 miljoona valovuotta
Constellation:Eridanus
Kategoria:Galaxies

Kuvaformaatit

Suuri JPEG
689,5 KB
Kokoruudun JPEG
174,1 KB

Zoomattavissa


Taustakuvat

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

Koordinaatit

Position (RA):3 40 9.36
Position (Dec):-35° 37' 27.97"
Field of view:6.44 x 6.47 arcminutes
Suuntaus:Pohjoinen on 89.9° vasen pystysuuntaan nähden

Värit ja suotimet

KaistaTeleskooppi
Optinen
B
Very Large Telescope
FORS1
Optinen
V
Very Large Telescope
FORS1
Infrapuna
I
Very Large Telescope
FORS1
Optinen
H-alpha
Very Large Telescope
FORS1
Ultravioletti
U
Very Large Telescope
FORS1

 

Katso myös