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The Astrophysical Journal
Article . 2002 . Peer-reviewed
Data sources: Crossref
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
https://dx.doi.org/10.48550/ar...
Article . 2002
License: arXiv Non-Exclusive Distribution
Data sources: Datacite
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X‐Ray Spectra of Intermediate‐Luminosity, Radio‐loud Quasars

Authors: Hasenkopf, Christa; Sambruna, Rita; Eracleous, Mike;

X‐Ray Spectra of Intermediate‐Luminosity, Radio‐loud Quasars

Abstract

We present new hard X-ray spectra of three radio-loud AGNs of moderately high X-ray luminosity (L_x ~ 10^45 erg/s; PKS 2349-01, 3C 323.1, and 4C 74.26) obtained with ASCA and BeppoSAX. The X-ray continua are described in all three cases with a power law model with photon indices of Gamma~1.85, modified at low energies by absorption in excess of the Galactic, which appears to be due to neutral gas. At higher energies, an Fe Ka emission line is detected in PKS 2349-01 and 4C 74.26, and is tentatively detected in 3C 323.1. The equivalent widths of the lines are consistent, albeit within large uncertainties, with the values for radio-quiet AGN of comparable X-ray luminosity. The Fe Ka line is unresolved in 4C 74.26. In the case of PKS 2349-01, however, the inferred properties of the line depend on the model adopted for the continuum: if a simple power-law model is used, the line is resolved at more than 99% confidence with a full width at half maximum corresponding to approximately 50,000 km/s and a rest-frame equivalent width of 230 +/- 120 eV, but if a Compton "reflection" model is used the line is found to be a factor of 2 weaker, for an assumed full width at half maximum of 50,000 km/s. In 4C 74.26, a strong Compton "reflection" component is detected. Its strength suggests that the scattering medium subtends a solid angle of 2pi to the illuminating source. Overall, the spectral indices of these radio-loud quasars are remarkably similar to those of their radio-quiet counterparts. On the other hand, if the absorber is indeed neutral, as our results suggest, this would be consistent with the typical properties of radio-loud AGNs.

To appear in ApJ, v.575, Aug 10, 2002. 14 pages, including 3 tables and 6 figures. Uses emulateapj5.sty

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Keywords

Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
18
Average
Average
Top 10%
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