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: | Chart |
| 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) |
Colours & filters
| Band | Telescope |
| Ultraviolet | Very Large Telescope UVES |
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