On the relation between Fe II emission and soft X-ray properties of quasars

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185498· OSTI ID:5556995

Boroson, T A ^[1]

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1. Mount Wilson and Las Campanas Observatories, Pasadena, CA (USA)

The claim that the equivalent width of the optical Fe II emission complexes and the soft X-ray slopes of quasars are related is examined. It is shown that among radio-loud quasars, flat radio spectrum objects have flatter soft X-ray slopes. This places steep radio spectrum quasars intermediate in their X-ray slopes between flat radio spectrum and radio-quiet objects. This information may be combined with the observation that steep radio spectrum quasars have weaker Fe II emission to suggest that no correlation between Fe II emission and X-ray spectral slope is expected. An analysis of 15 objects with homogeneously measured Fe II emission strengths and X-ray spectral slopes confirms this prediction. 13 refs.

• OSTI ID: 5556995
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 343; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
IONIZING RADIATIONS
IRON
LINE WIDTHS
METALS
QUASARS
RADIATIONS
RADIOWAVE RADIATION
RED SHIFT
SOFT X RADIATION
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENTS
X RADIATION
X-RAY SPECTRA