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.

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ESO

Om bilden

ID:eso9944e
Typ:Diagram
Publiceringsdatum:5 oktober 1999
Relaterade pressmeddelanden:eso9944
Storlek:3003 x 1540 px

Om objektet

Namn:QSO HE2217-2818, Spectrum
Typ:Early Universe : Galaxy : Activity : AGN : Quasar
Avstånd:z=2.4 (rödförskjutning)
Kategori:Quasars and Black Holes

Bildformat

Originalstorlek
315,0 kB
Stor jpeg
283,9 kB
Skärmstor jpeg
83,8 kB

Färger och filter

BandTeleskop
UltraviolettVery Large Telescope
UVES