Lyman-alpha forest in QSO HE2217-2818

A tracing of one spectral order, corresponding to one horizontal line in the echelle spectrum. It shows part of the Lyman-alpha forest in the ultraviolet spectrum of the southern quasar QSO HE2217-2818 . The absorption lines are caused by intervening, neutral hydrogen gas located at different distances along the line-of-sight towards this quasar.

Crédit:

ESO

À propos de l'image

Identification:eso9944e
Type:Graphique
Date de publication:5 octobre 1999
Communiqués de presse en rapport:eso9944
Taille:3003 x 1540 px

À propos de l'objet

Nom:QSO HE2217-2818, Spectrum
Type:Early Universe : Galaxy : Activity : AGN : Quasar
Distance:z=2.4 (redshift)
Catégorie:Quasars and Black Holes

Image Formats

Grand JPEG
283,9 Kio

Couleurs & filtres

DomaineTélescope
UltravioletVery Large Telescope
UVES