(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.

Credit:

ESO

Over de afbeelding

Id:eso9920l
Type:Observatie
Publicatiedatum:27 februari 1999
Gerelateerde berichten:eso9920, eso9916
Grootte:1152 x 1277 px

Over het object

Naam:NGC 1232
Type:Local Universe : Galaxy : Type : Spiral
Afstand:60 miljoen lichtjaren
Categorie:Galaxies

Afbeeldingstypen

Grote JPEG
1,5 MB

Achtergrond

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

Kleuren & filters

BandTelescoop
Infrarood
I
Very Large Telescope
FORS1
Optisch
V
Very Large Telescope
FORS1