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.



Sobre a imagem

Data de divulgação:6 de Abril de 2000
Notícias relacionadas:eso0013
Tamanho:800 x 392 px

Sobre o objeto

Nome:QSO HE22-28
Tipo:Early Universe : Galaxy : Activity : AGN : Quasar
Distância:z=2.4 (desvio para o vermelho)
Categoria:Quasars and Black Holes

Formatos de imagens

JPEG grande
71,9 KB

Cores e filtros

UltravioletaVery Large Telescope