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.

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ESO

Om bilden

ID:eso0128f
Typ:Diagram
Publiceringsdatum:14 augusti 2001
Relaterade pressmeddelanden:eso0128
Storlek:800 x 400 px

Om objektet

Namn:NGC 1808
Typ:Local Universe : Galaxy : Type : Barred
Avstånd:40 miljon ljusår
Kategori:Stars

Bildformat

Originalstorlek
69,6 kB
Stor jpeg
62,2 kB
Skärmstor jpeg
75,7 kB