Lyman-alpha Forest at z~2.0 in Quasar Spectrum

This chart shows a small part of the normalized UV-spectrum of the 16-mag QSO HE22-28 at z = 2.4, exposed for a total of 7.5 hours at spectral resolution about 40,000. It provides a fine illustration of the excellent quality of the reduced data from this instrument. Most of the lines are due to Lyman-alpha clouds at redshifts in the little-studied interval z = 1.9-2.1, cf. the text.

Credit:

ESO

About the Image

Id:eso0013f
Type:Observation
Release date:6 April 2000
Related releases:eso0013
Size:800 x 392 px

About the Object

Name:QSO HE22-28
Type:• Early Universe : Galaxy : Activity : AGN : Quasar
• X - Quasars & Black Holes
Distance:z=2.4 (redshift)

Image Formats

Large JPEG
71.3 KB
Screensize JPEG
88.0 KB

Wallpapers

1024x768
91.6 KB
1280x1024
117.3 KB
1600x1200
158.5 KB
1920x1200
192.6 KB
2048x1536
215.6 KB

Colours & filters

BandTelescope
UltravioletVery Large Telescope
UVES

 

Also see our