(V-I) colour index in NGC 1232

This "(V-I) colour-index image" was produced in the same way as eso9920k. It is based on two other exposures, taken on the same date, through a visual-green filter (V) and a near-infrared-red filter (I), respectively. The exposure time was 3 min for both. The field size and orientation is the same. The round, dark spot at the upper left is an artefact. Dust lanes in the spiral arms absorb more green light and therefore appear redder than their surroundings. In this differential image, they are seen as dark regions. They are exceptionally sharp and particularly strong in the inner part of the galaxy.

Herkunftsnachweis:

ESO

Über das Bild

ID:eso9920l
Typ:Beobachtung
Veröffentlichungsdatum:27. Februar 1999
Dazugehörige Veröffentlichungen:eso9920, eso9916
Größe:1152 x 1277 px

Über das Objekt

Name:NGC 1232
Typ:Local Universe : Galaxy : Type : Spiral
Entfernung:60 Million Lichtjahre
Kategorie:Galaxies

Bildformate

Großes JPEG
1,5 MB

Bildschirm-Hintergrundbilder

1024x768
744,0 KB
1280x1024
1,1 MB
1600x1200
1,3 MB
1920x1200
1,3 MB
2048x1536
1,8 MB

Farben & Filter

SpektralbereichTeleskop
Infrarot
I
Very Large Telescope
FORS1
Optisch
V
Very Large Telescope
FORS1