Intergalactic HeII absorption towards QSO 1157 + 3143 ⋆

@inproceedings{Reimers2005IntergalacticHA,
  title={Intergalactic HeII absorption towards QSO 1157 + 3143 ⋆},
  author={Dieter Reimers and Cora Fechner and H P Hagen and Peter Jakobsen and David Tytler and David P. Kirkman},
  year={2005}
}
We report the discovery of a further line of sight allowing detection of He ii Lyα absorption by the intergalactic medium. A HST/STIS survey of 32 bright z ∼ 3 quasars selected from the Hamburg Quasar Surveys yielded one detection toward QSO 1157+3143 (z ∼ 3, B ≃ 17). A 10 orbit follow-up spectrum reveals a UV spectrum significantly supressed by two intervening Lyman limit systems at z = 2.77 and 2.94, but with the continuum flux recovering sufficiently shortward of ∼ 1700 Å to allow study of… CONTINUE READING

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Ultraviolet Astrophysics beyond the IUE Final Archive, ESA-SP 413

D Reimers, S Köhler, H.-J Hagen, L Wisotzki
Ultraviolet Astrophysics beyond the IUE Final Archive, ESA-SP 413 • 1998

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