A sample of 37 nearby galaxies displaying composite LINER/H II and pure H II spectra was observed with the VLA in an investigation of the nature of their weak radio emission. The resulting radio contour maps overlaid on optical galaxy images are presented here, together with an extensive literature list and discussion of the individual galaxies. Radio morphological data permit assessment of the...

We have measured the angular correlation function, w(θ), of radio sources in the 1.4 GHz NVSS and FIRST radio surveys. Below ∼ 6′ the signal is dominated by the size distribution of classical double radio galaxies, an effect underestimated in previous studies. We model the physical size distribution of FRII radio galaxies to account for this excess signal in w(θ). The amplitude of the true cosm...

The radio counterparts to the IRAS Redshift Survey galaxies are identified in the NRAO VLA Sky Survey (NVSS) catalog. Our new catalog of the infrared flux-limited (S60μm ≥ 2 Jy) complete sample of 1809 galaxies lists accurate radio positions, redshifts, and 1.4 GHz radio and IRAS fluxes. This sample is six times larger in size and five times deeper in redshift coverage (to z ≈ 0.15) compared wi...

The radio counterparts to the IRAS Redshift Survey galaxies are identified in the NRAO VLA Sky Survey (NVSS) catalog. Our new catalog of the infrared flux-limited (S60μm ≥ 2 Jy) complete sample of 1809 galaxies lists accurate radio positions, redshifts, and 1.4 GHz radio and IRAS fluxes. This sample is six times larger in size and five times deeper in redshift coverage (to z ≈ 0.15) compared wi...

An analysis of type Ia supernova (SNIa) events in early type galaxies from Evans et al. (1989) database provides strong evidence that the rate of type Ia supernovae (SNe) in radio-loud galaxies is about 6 times higher than the rate measured in radio-quiet galaxies, i.e. SNIarate(radio − loud galaxies) = 0.47 −0.15 h 2 50 SNe per century and per 10 L ⊙ (SNU) as compared to SNIa-rate(radio− quiet...

In order to determine the incidence of black hole accretion-driven nuclear activity in nearby galaxies, as manifested by their radio emission, we have carried out a high-resolution Multi-Element Radio-Linked Interferometer Network (MERLIN) survey of LINERs and composite LINER/Hii galaxies from a complete magnitude-limited sample of bright nearby galaxies (Palomar sample) with unknown arcsecond-...

Plasma containing relativistic particles appears in various forms in the inter galactic medium (IGM): As radio plasma released by active radio galaxies, as fossil radio plasma from former radio galaxies – so called radio ghosts–, as cluster radio relics in some clusters of galaxies, and as cluster radio halos. The impact of the different forms of radio plasma on the IGM and their use as diagnos...

The large number of differences between highand low-redshift radio galaxies have almost all been discovered by looking at the bright 3C sample of radio sources. This has the disadvantage that the strong correlation between radio luminosity and redshift within a single sample makes it impossible to be determine whether these differences are the result of cosmic evolution or whether they are simp...

We present new results on the clustering and three-dimensional distribution of radio galaxies from the Texas-Oxford NVSS Structure (TONS) survey. The TONS survey was constructed to look at the distribution of radio galaxies in a region of moderate (0 ∼ z < ∼ 0.5) redshifts by matching NVSS sources with objects in APM catalogues to obtain a sample of optically bright (R ≤ 19.5), radio faint (1.4...

We report the discovery of the most distant known AGN, the radio galaxy TN J0924−2201 at z = 5.19. The radio source was selected from a new sample of ultra–steep spectrum (USS) sources, has an extreme radio spectral index α 365MHz = −1.63, and is identified at near–IR wavelengths with a very faint, K = 21.3± 0.3 object. Spectroscopic observations show a single emission line at λ ∼ 7530 Å which ...