Observations of the broad-absorption-line QSO H1011+091
نویسندگان
چکیده
منابع مشابه
Molecular QSO Absorption Line Systems
We review observations of molecular absorption line systems at high redshift toward red quasars and gravitational lenses. The steeply falling power law column density distribution function of QSO absorption line systems implies that for every 1000 Ly α forest lines from absorbers with hydrogen column density, NH < 10 15 cm there will be only one system with NH ≥ 10 cm (Hu et al. 1995). Although...
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The broad absorption line (BAL) features seen in a small fraction of quasar optical/UV spectra are attributed to bulk outflows away from the quasar core. Observational evidence suggests that dust plays a key role in these systems, although whether the inferred dust properties are a signature of orientation effects or whether they are indicative of an evolutionary sequence remains an outstanding...
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We have analyzed the broad absorption line system of the bright (V ∼ 16.5) high-redshift (z = 2.361) QSO SBS1542+541 using UV spectra from the HST FOS along with optical data from the MMT and the Steward Observatory 2.3m telescope. These spectra offer continuous wavelength coverage from 1200 to 8000 Å, corresponding to ∼ 340− 2480 Å in the QSO rest frame. The line of sight to the object contain...
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We present the analysis and interpretation of a sample of eight ASCA observations of Broad Absorption Line Quasi-Stellar Objects (BALQSOs). This is the first moderate-sized sample of sensitive BALQSO observations above 2 keV, and the BALQSOs in our sample are among the optically brightest known (B = 14.5–18.5). Despite the ability of 2–10 keV X-rays to penetrate large column densities, we find ...
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We have discovered two low-ionization broad absorption line quasars in programs to obtain optical spectra for radio-selected quasar candidates from the VLA FIRST Survey (Becker, White, & Helfand 1995). Both belong to the extremely rare class of BAL QSOs that exhibit narrow absorption lines from
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1983
ISSN: 0004-6280,1538-3873
DOI: 10.1086/131224