NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-18 T23:52:26 PDT
Help | Comment | NED Home

For refcode 1992MNRAS.254..546M:
Retrieve 34 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 1992MNRAS.254..546M Optical line-emitting gas and radio emission: evidence for correlation in low-luminosity radio galaxies R. Morganti, M.-H. Ulrich and C. N. Tadhunter Istituto di Radioastronomia, via Irnerio 46,40126 Bologna, Italy European Southern Observatory, Karl-Schwarzschild-Strafle-2 D-8046 Garching bei Munchen, Germany Royal Greenwich Observatory Madingley Road, Cambridge CB3 0EZ Accepted 1991 September 2. Received 1991 August 21; in original form 1991 May 16 SUMMARY Narrow-band H{alpha} + [N II] images of a sample of low-luminosity B2 radio sources are used to investigate the correlations between radio and optical emission-line properties. It is shown that the correlation between radio and emission-line luminosity - previously established for high-power radio galaxies - extends over five decades in radio luminosity and includes the low radio power sources. It is also shown that the compact radio sources have emission-line excesses relative to the other sources in the sample of the same radio power, as well as far-infrared (IR) emission characteristics of emission from cool dust. Although continuity arguments can be used to show that the ionized gas in most of the low-luminosity sources is likely to be photoionized by the Active Galactic Nucleus (AGN), it is possible that additional ionizing sources contribute in the compact, emission-line excess objects. A programme of detailed spectroscopic observations is required to investigate the underlying physical mechanisms in more depth.
Retrieve 34 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home