(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.

Crédito:

ESO

Sobre la imagen

Identificador:eso9920l
Tipo:Observación
Fecha de publicación:27 de Febrero de 1999
Noticias relacionadas:eso9920, eso9916
Tamaño:1152 x 1277 px

Sobre el objeto

Nombre:NGC 1232
Tipo:Local Universe : Galaxy : Type : Spiral
Distancia:60 millón años luz
Categoría:Galaxies

Formatos de imagen

JPEG grande
1,5 MB

Fondo de pantalla

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

Colores y filtros

BandaTelescopio
Infrarrojo
I
Very Large Telescope
FORS1
Óptico
V
Very Large Telescope
FORS1