Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.279.1349g&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. Vol. 279, No. 4, p. 1349 - 1356
Astronomy and Astrophysics
Astronomy
25
Quasars: Emission Lines, Quasars: General -- Ultraviolet: Galaxies, Quasars: Emission Lines, Quasars: Iron Lines, Quasars: Spectra
Scientific paper
The authors report the discovery of an unusual quasar, 2226-3905, found during a survey of quasar candidates. The ultraviolet spectrum (intrinsic frame) of the object is dominated by extremely strong Fe II emission. The emission lines are narrow (typical FWHM ≡2150 km s-1) and show little trace of their usually broad wings. C III] λ1909 appears to be blended with an Fe III multiplet and the authors identify Fe II lines originating from high-energy levels (≡10 eV). The authors consider two possible explanations: either the quasar is a low-ionization broad absorption line (BAL) quasar in which the sight-line does not intersect any BAL clouds or Lyα fluorescence is the main physical process involved in the formation of Fe II. Their observations do not favour the BAL interpretation, but rather support the latter process. Higher resolution observations would give definite support to the Lyα fluorescence.
Campusano Luis E.
Clowes Roger G.
Graham Mary Jane
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