Results 21 to 30 of about 102,596 (294)

The fundamental plane of radio galaxies [PDF]

Astronomy & Astrophysics, 2001
We collected photometrical and dynamical data for 73 low red-shift (z<0.2) Radio Galaxies (LzRG) in order to study their Fundamental Plane (FP). For 22 sources we also present new velocity dispersion data, that complement the photometric data given in our previous study of LzRG (Govoni et al. 2000a). It is found that the FP of LzRG is similar to the
Renato Falomo, Riccardo Scarpa, M. Salvo, Daniela Bettoni, Federica Govoni, G. Fasano   +5 more
openaire   +7 more sources

Dynamics of Powerful Radio Galaxies

Galaxies, 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

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

Serbian 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., Bojičić I., Pannuti T.G., Urošević Dejan V.   +3 more
doaj   +1 more source

COLA II - Radio and Spectroscopic Diagnostics of Nuclear Activity in Galaxies [PDF]

, 2002
We present optical spectroscopic observations of 93 galaxies taken from the infra-red selected COLA (Compact Objects in Low Power AGN) sample. The sample spans the range of far-IR luminosities from normal galaxies to LIRGs.
A. Marston, A. Zezas, C. A. Heisler, Clavel J., de Grijp M. H. K., E. A. Corbett, Efstathiou A., Fairall A. P., Fairall A. P., Gardner F. F., Hagiwara Y., Heckman T., Heisler C. A., Keel W. C., Knappen J. H., L. Kewley, Laurent O., M. A. Dopita, Martin J. M., P. N. Appleton, R. P. Norris, V. Charmandaris   +21 more
core   +2 more sources

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

Galaxies, 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, Portia Legodi, Bernie Fanaroff, Tiziana Venturi, Oleg M. Smirnov, Marco Bondi, Kshitij Thorat, Landman H. Bester, Gyula I. G. Józsa, Dane Kleiner, Francesca Loi, Sphesihle Makhathini, Sarah V. White   +12 more
doaj   +1 more source

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

Monthly 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.
Lawrence Rudnick, Anna M. M. Scaife, Anna M. M. Scaife, Anna D. Kapińska, Stanislav S. Shabala, Nick Seymour, Hongming Tang, O. I. Wong, O. I. Wong, Ray P. Norris, Ray P. Norris   +10 more
openaire   +3 more sources

Jets in FR0 radio galaxies

Astronomy & Astrophysics, 2023
Context.The local radio-loud AGN population is dominated by compact sources named FR0s. These sources show features, for example the host type, the mass of the supermassive black hole (SMBH), and the multi-band nuclear characteristics, that are similar to those of FRI radio galaxies.
G. Giovannini, R. D. Baldi, A. Capetti, M. Giroletti, R. Lico   +4 more
openaire   +4 more sources

Statistical Properties of Radio Emission from the Palomar Seyfert Galaxies [PDF]

, 2001
We have carried out an analysis of the radio and optical properties of a statistical sample of 45 Seyfert galaxies from the Palomar spectroscopic survey of nearby galaxies.
Antonucci R. R. J., Busko I. C., Clark D. H., de Bruyn A. G., de Bruyn A. G., de Grijp M. H. K., Isobe T., James S. Ulvestad, Kukula M. J., Luis C. Ho, Meurs E. J. A., Pedlar A., Perley R. A., Unger S. W., Whittle M., Whittle M.   +15 more
core   +2 more sources

Radio Galaxies at VHE Energies [PDF]

Galaxies, 2018
Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to probe the nature and physics of active galactic nuclei (AGN) in general.
Frank Rieger, Amir Levinson
openaire   +5 more sources

Combining LOFAR and Apertif Data for Understanding the Life Cycle of Radio Galaxies

Galaxies, 2021
Active galactic nuclei (AGN) at the centres of galaxies can cycle between periods of activity and of quiescence. Characterising the duty-cycle of AGN is crucial for understanding their impact on the evolution of the host galaxy.
Raffaella Morganti, Nika Jurlin, Tom Oosterloo, Marisa Brienza, Emanuela Orrú, Alexander Kutkin, Isabella Prandoni, Elizabeth A. K. Adams, Helga Dénes, Kelley M. Hess, Aleksandar Shulevski, Thijs van der Hulst, Jacob Ziemke   +12 more
doaj   +1 more source