A dwarf galaxy with a halo

This photo is a reproduction from a combination of two CCD frames observed with the 3.5-m New Technology Telescope (NTT) and the ESO Multi-Mode Instrument (EMMI). The field covers an area of approx. 7.8 x 11.5 arcmin.
In the lower part is seen the WLM dwarf galaxy, fully resolved into individual stars. From these observations, this galaxy has now been found to possess an extended halo of which many stars can be perceived in the upper part of the field. A few background galaxies that are unrelated to WLM are also visible. At the distance of WLM, about 3 million light years, the field corresponds to a projected area of about 10,000 x 6,000 light years.
The frames were observed in the near-infrared I-band and each exposure lasted about 45 minutes. The seeing was about 0.9 arcsec, and the faintest stars that are visible have an I-band magnitude of 24. In this reproduction, North is to the left and East is down.

Crédito:

ESO

Sobre la imagen

Identificador:eso9633a
Tipo:Observación
Fecha de publicación:1 de Agosto de 1996
Noticias relacionadas:eso9633
Tamaño:1648 x 2442 px

Sobre el objeto

Nombre:Galaxy
Tipo:Local Universe : Galaxy : Component : Halo
Local Universe : Galaxy : Size : Dwarf
Categoría:Galaxies

Formatos de imagen

JPEG grande
1,2 MB

Colores y filtros

BandaTelescopio
Infrarrojo
I
New Technology Telescope
EMMI