The remarkable broad absorption line QSO 0059-2735 with extensive Fe II absorption
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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With 40 ks of Chandra ACIS-S3 exposure, new information on both the starburst and QSO components of the X-ray emission of Markarian 231, an ultraluminous infrared galaxy and Broad Absorption Line QSO, has been obtained. The bulk of the X-ray luminosity is emitted from an unresolved nuclear point source, and the spectrum is remarkably hard with the majority of the flux emitted above 2 keV. Most ...
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Abundance histories for QSO absorption line systems as a function of redshift are presented for all metals lighter than gallium. Coupling various conventional cosmological models with a simple, rst{order model for the chemical evolution of the QSO absorption line systems allows transformation of the observed abundance trends in the Galaxy to abundance histories for the gas in QSO absorption lin...
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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 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: The Astrophysical Journal
سال: 1987
ISSN: 0004-637X,1538-4357
DOI: 10.1086/165823