Stellar motions at the centre of NGC 1808

In this chart, the measured velocities (ordinate) of the stars near the centre of NGC 1808 are plotted at different distances from the nucleus (abscissa). The right half shows the corresponding curve after "removal" of the effect from the rotation — the remaining spread is a direct measure of the "velocity dispersion" and the individual stellar motions. As can be clearly seen, the width of the "band" decreases towards the centre, indicating the presence of a "dynamically cool" central stellar system.

Crédito:

ESO

Sobre la imagen

Identificador:eso0128f
Tipo:Mapa
Fecha de publicación:14 de Agosto de 2001
Noticias relacionadas:eso0128
Tamaño:800 x 400 px

Sobre el objeto

Nombre:NGC 1808
Tipo:Local Universe : Galaxy : Type : Barred
Distancia:40 millón años luz
Categoría:Stars

Formatos de imagen

JPEG grande
62,2 KB