Results 31 to 40 of about 1,089,439 (292)

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

FRICAT: A FIRST catalog of FRI radio galaxies [PDF]

, 2016
We built a catalog of 219 FRI radio galaxies (FRIs), called FRICAT, selected from a published sample and obtained by combining observations from the NVSS, FIRST, and SDSS surveys.
A. Capetti, F. Massaro, R. D. Baldi
semanticscholar   +1 more source

Compact radio sources and jet-driven AGN feedback in the early Universe: Constraints from integral-field spectroscopy [PDF]

, 2007
To investigate the impact of radio jets during the formation epoch of their massive host galaxies, we present an analysis of two massive, log(M_stel/ M_sun)~10.6 and 11.3, compact radio galaxies at z=3.5, TNJ0205+2242 and TNJ0121+1320.
A. Gilbert, Axon, Barnes, Begelman, Benson, Best, Bicknell, Blundell, Bonnet, Bullock, C. De Breuck, Capetti, Croton, De Breuck, De Breuck, De Breuck, De Breuck, De Breuck, De Young, Di Matteo, Downes, Holt, Holt, Hopkins, Inskip, Inskip, Inskip, Iwamuro, Kauffmann, Laing, M. D. Lehnert, McCarthy, Morganti, Murgia, N. P. H. Nesvadba, Nelson, Nesvadba, Nesvadba, O'Dea, O'Dea, Owsianik, Papadopoulos, Pedlar, Pounds, Readhead, Silk, Sulentic, Tadhunter, Tadhunter, Tadhunter, van Breugel, Villar-Martín, Villar-Martín, Villar-Martín, Villar-Martín, W. van Breugel, Wellman, Willott   +57 more
core   +1 more source

GAMA/WiggleZ: the 1.4 GHz radio luminosity functions of high- and low-excitation radio galaxies and their redshift evolution to z = 0.75 [PDF]

, 2016
© 2016 The Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. We present radio active galactic nuclei (AGN) luminosity functions over the redshift range 0.005 < z < 0.75.
M. Pracy, J. Ching, E. Sadler, S. Croom, I. Baldry, J. Bland-Hawthorn, S. Brough, Michael J. I. Brown, W. Couch, T. Davis, M. Drinkwater, A. Hopkins, M. Jarvis, Ben Jelliffe, R. Jurek, J. Loveday, K. Pimbblet, M. Prescott, Emily Wisniosk, D. Woods   +19 more
semanticscholar   +1 more source

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

Radio Galaxy Zoo: A Search for Hybrid Morphology Radio Galaxies [PDF]

, 2017
Hybrid morphology radio sources (HyMoRS) are a rare type of radio galaxy that display different Fanaroff–Riley classes on opposite sides of their nuclei.
A. Kapińska, I. Terentev, O. I. Wong, S. Shabala, H. Andernach, L. Rudnick, Lucas Storer, J. Banfield, K. Willett, F. Gasperin, C. Lintott, Á. López-Sánchez, Á. López-Sánchez, E. Middelberg, R. Norris, R. Norris, K. Schawinski, N. Seymour, B. Simmons, B. Simmons   +19 more
semanticscholar   +1 more source

The Photometric and Spectroscopic Properties of Remnant and Restarted Radio Galaxies in the Lockman Hole Field

Galaxies, 2021
Radio galaxies are known to undergo phases of activity, where the stage after the jets have switched off is referred to as the remnant phase. This state can be followed by a restarted phase when the activity reignites. Remnant and restarted radio sources
Nika Jurlin, Raffaella Morganti, Natasha Maddox, Marisa Brienza   +3 more
doaj   +1 more source

Radio galaxies dominate the high-energy diffuse gamma-ray background [PDF]

, 2016
It has been suggested that unresolved radio galaxies and radio quasars (sometimes referred to as misaligned active galactic nuclei) could be responsible for a significant fraction of the observed diffuse gamma-ray background.
D. Hooper, T. Linden, A. López
semanticscholar   +1 more source

Galaxy And Mass Assembly (GAMA): the environments of high- and low- excitation radio galaxies [PDF]

, 2017
We study the environments of low- and high- excitation radio galaxies (LERGs and HERGs respectively) in the redshift range $0.01 < z < 0.4$, using a sample of 399 radio galaxies and environmental measurements from the Galaxy And Mass Assembly (GAMA ...
J. Ching, S. Croom, E. Sadler, A. Robotham, S. Brough, I. Baldry, J. Bland-Hawthorn, M. Colless, S. Driver, B. Holwerda, A. Hopkins, M. Jarvis, H. Johnston, L. Kelvin, J. Liske, J. Loveday, P. Norberg, M. Pracy, O. Steele, D. Thomas, L. Sydney, U. S. Andrews, International Centre for Radio Astronomy Research, Australian Astronomical Observatory, Liverpool John Moore's University, The Australian National University, U. Louisville, U. Oxford, U. W. Cape, U. Innsbruck, U. Hamburg, U. Sussex, D. University, U. Portsmouth, S. I. F. S. Research, U. Groningen   +35 more
semanticscholar   +1 more source

Alignments of radio galaxies in deep radio imaging of ELAIS N1 [PDF]

, 2016
We present a study of the distribution of radio jet position angles of radio galaxies over an area of 1 square degree in the ELAIS N1 field. ELAIS N1 was observed with the Giant Metrewave Radio Telescope at 612 MHz to an rms noise level of 10 $\mu$Jy and
A. Taylor, P. Jagannathan
semanticscholar   +1 more source