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We present the first results from a JWST program studying the role played by powerful radio jets in the evolution of the most massive galaxies at the onset of Cosmic Noon. Using NIRSpec integral field spectroscopy, we detect 24 rest-frame…

The latest results of the most detailed analysis of multi-epoch polarization-sensitive observations of active galactic nuclei (AGN) jets at parsecs scales by very long baseline interferometry (VLBI) reveal several characteristic patterns of…

High Energy Astrophysical Phenomena · Physics 2024-02-13 R. V. Todorov , E. V. Kravchenko , I. N. Pashchenko , A. B. Pushkarev

We present an analytical model for jets in Fanaroff & Riley Class I (FRI) radio galaxies, in which an initially laminar, relativistic flow is surrounded by a shear layer. We apply the appropriate conservation laws to constrain the jet…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Y. Wang , C. R. Kaiser , R. Laing , P. Alexander , G. Pavlovski , C. Knigge

In this study we investigate 179 radio-IR galaxies drawn from a sample of spectroscopically-confirmed galaxies that are detected in radio and mid-infrared (MIR) in the redshift range of $0.55 \leq z \leq 1.30$ in the Observations of…

Supermassive black holes can launch powerful jets which can be some of the most luminous multi-wavelength sources; decades after their discovery their physics and energetics are still poorly understood. The past decade has seen a dramatic…

High Energy Astrophysical Phenomena · Physics 2018-11-07 M. Lucchini , S. Markoff , P. Crumley , F. Krauß , R. M. T. Connors

Feedback by Active Galactic Nuclei is often divided into quasar and radio mode, powered by radiation or radio jets, respectively. Both are fundamental in galaxy evolution, especially in late-type galaxies, as shown by cosmological…

Astrophysics of Galaxies · Physics 2018-03-28 S. Cielo , R. Bieri , M. Volonteri , A. Wagner , Y. Dubois

The LOw Frequency ARray Two-metre Sky Survey second data release (LoTSS DR2) covers 27\% of the northern sky and contains around four million radio sources. The development of this catalogue involved a large citizen science project (Radio…

Astrophysics of Galaxies · Physics 2025-07-16 Maya Horton , Martin Hardcastle , George Miley , Cyril Tasse , Timothy Shimwell

Ionization cones and relativistic jets give us one of the most large-scale example of active galactic nuclei (AGN) influence on the surrounding gas environment in galaxies and beyond. The study of ionization cones makes it possible not only…

Astrophysics of Galaxies · Physics 2023-12-05 Alexei V. Moiseev , Aleksandrina A. Smirnova

Following previous work, we further confirm that the cosmic evolution of steep-spectrum radio-loud AGNs (active galactic nuclei) can be reproduced by a simple combination of density evolution (DE) and luminosity evolution (LE). This mixture…

High Energy Astrophysical Phenomena · Physics 2018-10-31 Zunli Yuan , Jiancheng Wang , Ming Zhou , Longhua Qin , Jirong Mao

The class of Double-Double Radio Galaxies (DDRGs) relates to episodic jet outbursts. How various regions and components add to the total intensity in radio images is less well known. In this paper we synthesize synchrotron images for DDRGs…

High Energy Astrophysical Phenomena · Physics 2020-07-30 S. Walg , A. Achterberg , S. Markoff , R. Keppens , O. Porth

The time evolution of giant lobe-dominated radio galaxies (with projected linear size D>1 Mpc if H_{0}=50 km/s/Mpc and q_{0}=0.5 is analysed on the basis of dynamical evolution of the entire FRII-type population. Two basic physical…

Astrophysics · Physics 2007-05-23 J. Machalski , K. T. Chyzy , M. Jamrozy

This paper presents the first measurement of the radio luminosity function of 'jet-mode' (radiatively-inefficient) radio-AGN out to z=1, in order to investigate the cosmic evolution of radio-AGN feedback. Eight radio source samples are…

Astrophysics of Galaxies · Physics 2015-06-22 P. N. Best , L. M. Ker , C. Simpson , E. E. Rigby , J. Sabater

We studied bent radio sources within X-ray galaxy groups in the COSMOS and XMM-LSS fields, using radio data from the MeerKAT International GHz Tiered Extragalactic Explorations data release 1 (MIGHTEE-DR1) at 1.2-1.3 GHz (angular…

A 3-dimensional model of the synchrotron emissivity of the cocoons of powerful extragalactic radio sources of type FRII is constructed. Bulk backflow and energy losses of the relativistic electrons, radiative and adiabatic, are…

Astrophysics · Physics 2007-05-23 Christian R. Kaiser

A catalogue of 14453 radio-loud AGN with 1.4 GHz fluxes above 3.5 mJy in the redshift range 0.4<z<0.8, has been constructed from the cross-correlation of the NVSS and FIRST radio surveys with the MegaZ-LRG catalogue of luminous red galaxies…

Astrophysics · Physics 2010-11-30 E. Donoso , P. N. Best , G. Kauffmann

Radio-loud high-redshift quasars (RHRQs) provide crucial insights into the evolution of relativistic jets and their connection to the growth of supermassive black holes. Beyond the extensively studied population at $z \ge 5$, the cosmic…

Astrophysics of Galaxies · Physics 2025-12-08 Yingkang Zhang , Ruqiu Lin , Krisztina Perger , Sándor Frey , Tao An , Xiang Ji , Qiqi Wu , Shilong Liao

To investigate the differences in mechanical feedback from radio-loud and radio-quiet Active Galactic Nuclei (AGN) on the host galaxy, we perform 3D AMR hydrodynamic simulations of wide angle, radio-quiet winds with different inclinations…

Astrophysics of Galaxies · Physics 2017-07-26 Zachary Dugan , Volker Gaibler , Joseph Silk

Feedback from active galactic nuclei (AGN) has become a major component in simulations of galaxy evolution, in particular for massive galaxies. AGN jets have been shown to provide a large amount of energy and are capable of quenching…

Cosmology and Nongalactic Astrophysics · Physics 2012-09-13 Volker Gaibler , Sadegh Khochfar , Martin Krause , Joseph Silk

In order to reveal the long-term evolution of relativistic jets in active galactic nuclei (AGNs), we examine the dynamical evolution of variously-sized radio galaxies [i.e., compact symmetric objects (CSOs), medium-size symmetric objects…

Astrophysics · Physics 2009-11-13 Nozomu Kawakatu , Hiroshi Nagai , Motoki Kino

A sample of 2712 radio-luminous galaxies is defined from the second data release of the Sloan Digital Sky Survey (SDSS) by cross-comparing the main spectroscopic galaxy sample with two radio surveys: the NRAO VLA Sky Survey (NVSS) and the…

Astrophysics · Physics 2009-11-11 P. N. Best , G. Kauffmann , T. M. Heckman , Z. Ivezic
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