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.

Credit:

ESO

Over de afbeelding

Id:eso9944e
Type:Kaart
Publicatiedatum:5 oktober 1999
Gerelateerde berichten:eso9944
Grootte:3003 x 1540 px

Over het object

Naam:QSO HE2217-2818, Spectrum
Type:Early Universe : Galaxy : Activity : AGN : Quasar
Afstand:z=2.4 (roodverschuiving)
Categorie:Quasars and Black Holes

Image Formats

Grote JPEG
283,9 KB

Kleuren & filters

BandTelescoop
UltravioletVery Large Telescope
UVES