Constraining the central engine of radio-loud AGNs

Rita M. Sambruna, Michael Eracleous, Richard F. Mushotzky

Research output: Contribution to journalShort survey

12 Citations (Scopus)

Abstract

We present an X-ray spectral survey of radio-loud (RL) AGNs using ASCA and RXTE. The goal was to study the structure of their central engines and compare it to that of their radio-quiet (RQ) counterparts. We find systematic differences in the X-ray properties of the two AGN classes. Specifically, RL AGNs exhibit weaker Fe lines and reflection components than RQ AGNs, indicating smaller solid angles subtended by the re-processing medium to the X-ray source. The circumnuclear environs of RL and RQ AGNs also differ: large amounts of cold gas are detected in Broad Line Radio Galaxies and Quasars, contrary to what is found in Seyfert galaxies of similar X-ray luminosity. We also discuss ASCA observations of Weak Line Radio Galaxies, a distinct subset of radio galaxies which may harbor a low-luminosity AGN powered by an advection-dominated accretion flow.

Original languageEnglish (US)
Pages (from-to)215-220
Number of pages6
JournalNew Astronomy Reviews
Volume46
Issue number2-7
DOIs
StatePublished - Jan 1 2002

Fingerprint

engines
engine
radio galaxies
radio
x rays
luminosity
Seyfert galaxies
cold gas
X Ray Timing Explorer
harbors
advection
quasars
set theory
harbor
accretion
gas

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Sambruna, Rita M. ; Eracleous, Michael ; Mushotzky, Richard F. / Constraining the central engine of radio-loud AGNs. In: New Astronomy Reviews. 2002 ; Vol. 46, No. 2-7. pp. 215-220.
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Constraining the central engine of radio-loud AGNs. / Sambruna, Rita M.; Eracleous, Michael; Mushotzky, Richard F.

In: New Astronomy Reviews, Vol. 46, No. 2-7, 01.01.2002, p. 215-220.

Research output: Contribution to journalShort survey

TY - JOUR

T1 - Constraining the central engine of radio-loud AGNs

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AU - Mushotzky, Richard F.

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AB - We present an X-ray spectral survey of radio-loud (RL) AGNs using ASCA and RXTE. The goal was to study the structure of their central engines and compare it to that of their radio-quiet (RQ) counterparts. We find systematic differences in the X-ray properties of the two AGN classes. Specifically, RL AGNs exhibit weaker Fe lines and reflection components than RQ AGNs, indicating smaller solid angles subtended by the re-processing medium to the X-ray source. The circumnuclear environs of RL and RQ AGNs also differ: large amounts of cold gas are detected in Broad Line Radio Galaxies and Quasars, contrary to what is found in Seyfert galaxies of similar X-ray luminosity. We also discuss ASCA observations of Weak Line Radio Galaxies, a distinct subset of radio galaxies which may harbor a low-luminosity AGN powered by an advection-dominated accretion flow.

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