Spectroscopy of PKS 1157 + 014: a QSO with no Lyman emission
نویسندگان
چکیده
منابع مشابه
HeII absorption towards QSO 1157 + 3143 ⋆
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 a...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1979
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/189.3.611