Results 31 to 40 of about 97,087 (224)

Viewing Classical Radio Galaxies with the Upgraded GMRT and MeerKAT—A Progress Report

open access: yesGalaxies, 2021
We present a progress report of a study of FR I and FR II radio galaxies. Several new morphological features in the radio emission are now revealed using the high (μJy) sensitivity reached in the range 550–1712 MHz, more than a factor of three, at the ...
Dharam V. Lal   +12 more
doaj   +1 more source

Distant FR I radio galaxies in the Hubble Deep Field: implications for the cosmological evolution of radio-loud AGN [PDF]

open access: yes, 2001
Deep and high resolution radio observations of the Hubble Deep Field and flanking fields have shown the presence of two distant edge-darkened FR I radio galaxies, allowing for the first time an estimate of their high redshift space density.
Baum   +21 more
core   +2 more sources

The Extended Radio Structures of Quasars and Radio Galaxies [PDF]

open access: yesSymposium - International Astronomical Union, 1986
We have observed 20 classical double radio galaxies and quasars with MERLIN at 151 MHz. We discuss the systematic variation of the bridge structures with radio power and the nature of the identification.
J.P. Leahy, P.W. Stephens, T.W.B. Muxlow
openaire   +1 more source

A closer view of the radio-FIR correlation: disentangling the contributions of star formation and AGN activity [PDF]

open access: yes, 2010
We extend the Unified Radio Catalog, a catalog of sources detected by various (NVSS, FIRST, WENSS, GB6) radio surveys, and SDSS, to IR wavelengths by matching it to the IRAS Point and Faint Source catalogs.
A. Kimball   +25 more
core   +4 more sources

A search for candidate radio supernova remnants in the nearby irregular starburst galaxies NGC 4214 and NGC 4395 [PDF]

open access: yesSerbian Astronomical Journal, 2005
We present the results of a search for new candidate radio su­pernova remnants (SNRs) in the nearby starburst irregular galaxies NGC 4214 and NGC 4395 using archived radio observations made with the Very Large Array (VLA) at the wavelengths of 3.5 cm, 6 ...
Vukotić B.   +3 more
doaj   +1 more source

On black hole masses, radio-loudness and bulge luminosities of Seyfert galaxies [PDF]

open access: yes, 2001
We estimated black hole masses for 9 Seyfert 1 and 13 Seyfert 2 galaxies in the Palomar and CfA bright Seyfert samples using the tight correlation between black hole mass and bulge velocity dispersion.
Adams   +62 more
core   +3 more sources

Radio Galaxy Spectra

open access: yes, 2001
4 pages, 3 figures, submitted to 'Particles & Fields in Radio Galaxies' eds Laing & Blundell, ASP conference ...
Jackson, C, Wall, J
openaire   +3 more sources

Dynamics of Powerful Radio Galaxies

open access: yesGalaxies, 2023
Analytical models describing the dynamics of lobed radio sources are essential for interpretation of the tens of millions of radio sources that will be observed by the Square Kilometre Array and pathfinder instruments. We propose that historical models can be grouped into two classes in which the forward expansion of the radio source is driven by ...
Ross Turner, Stanislav Shabala
openaire   +3 more sources

Radio Galaxy Zoo: new giant radio galaxies in the RGZ DR1 catalogue [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2020
ABSTRACT In this paper, we present the identification of five previously unknown giant radio galaxies (GRGs) using Data Release 1 of the Radio Galaxy Zoo citizen science project and a selection method appropriate to the training and validation of deep learning algorithms for new radio surveys.
H Tang   +7 more
openaire   +3 more sources

The Environments of Low and High Luminosity Radio Galaxies at Moderate Redshifts

open access: yes, 2008
In the local Universe, high-power radio galaxies live in lower density environments than low-luminosity radio galaxies. If this trend continues to higher redshifts, powerful radio galaxies would serve as efficient probes of moderate redshift groups and ...
Aceves   +20 more
core   +1 more source

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