DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A spatially resolved spectral analysis of giant radio galaxies with MeerKAT

Journal Article · · Monthly Notices of the Royal Astronomical Society
ORCiD logo; ORCiD logo; ; ; ORCiD logo; ORCiD logo; ; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo

ABSTRACT In this study we report the spatially resolved, wideband spectral properties of three giant radio galaxies (GRGs) in the COSMOS field: MGTC J095959.63+024608.6, MGTC J100016.84+015133.0, and MGTC J100022.85+031520.4. One of these galaxies, MGTC J100022.85+031520.4, is reported here for the first time, with a projected linear size of 1.29 Mpc at a redshift of 0.1034. Unlike the other two, it is associated with a brightest cluster galaxy (BCG), making it one of the few GRGs known to inhabit cluster environments. We examine the spectral age distributions of the three GRGs using new MeerKAT UHF-band (544–1088 MHz) observations, and L-band (900–1670 MHz) data from the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) survey. We test two models of spectral ageing, the Jaffe–Perola and Tribble models, using the Broadband Radio Astronomy Tools (brats) software, and find that they agree well with each other. We estimate the Tribble spectral age for MGTC J095959.63+024608.6 as 68 Myr, for MGTC J100016.84+015133.0 as 47 Myr, and for MGTC J100022.85+031520.4 as 67 Myr. We find significant disagreements between these spectral age estimates and the estimates of the dynamical ages of these GRGs, modelled in cluster and group environments. Our results highlight the need for additional processes that are not accounted for in either the dynamic age or the spectral age estimations.

Sponsoring Organization:
USDOE
OSTI ID:
2504002
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 1 Vol. 537; ISSN 0035-8711
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (61)

Revised equipartition and minimum energy formula for magnetic field strength estimates from radio synchrotron observations journal July 2005
Decoding the giant extragalactic radio sources journal February 2023
3C236, DA240; the largest radio sources known journal August 1974
The universal galaxy cluster pressure profile from a representative sample of nearby systems (REXCESS) and the Y SZM 500 relation journal July 2010
Radio continuum properties of luminous infrared galaxies journal January 2015
Planck 2015 results : XIII. Cosmological parameters journal September 2016
The VLA-COSMOS 3 GHz Large Project: Continuum data and source catalog release journal June 2017
A closer look at the deep radio sky: Multi-component radio sources at 3 GHz VLA-COSMOS journal July 2019
Radio-loud AGN in the first LoTSS data release: The lifetimes and environmental impact of jet-driven sources journal February 2019
Search and analysis of giant radio galaxies with associated nuclei (SAGAN): I. New sample and multi-wavelength studies journal October 2020
The LOFAR Two-metre Sky Survey: V. Second data release journal February 2022
Measuring the giant radio galaxy length distribution with the LoTSS journal April 2023
The LOFAR Two-Metre Sky Survey journal October 2023
Constraining the giant radio galaxy population with machine learning and Bayesian inference journal November 2024
Giant radio galaxies in the LOFAR deep fields journal May 2024
Reviving fossil radio plasma in clusters of galaxies by adiabatic compression in environmental shock waves journal January 2001
A new sample of giant radio galaxies from the WENSS survey: II. A multi-frequency radio study of a complete sample: Properties of the radio lobes and their environment journal October 2000
The radio properties of cD galaxies in Abell clusters. I - an X-ray selected sample journal January 1990
Multifrequency radio observations of Cygnus A - Spectral aging in powerful radio galaxies journal December 1991
Northern dwarf and low surface brightness galaxies. I - The Arecibo neutral hydrogen survey journal February 1990
The Nature and Evolution of Classical Double Radio Sources from Complete Samples journal February 1999
The Spectra and Energies of Classical Double Radio Lobes journal March 2000
Radio Halo and Relic Candidates from the Westerbork Northern Sky Survey journal February 2001
An X‐Ray Study of Magnetic Field Strengths and Particle Content in the Lobes of FR II Radio Sources journal June 2005
The Sixth Data Release of the Sloan Digital Sky Survey
  • Adelman‐McCarthy, Jennifer K.; Agüeros, Marcel A.; Allam, Sahar S.
  • The Astrophysical Journal Supplement Series, Vol. 175, Issue 2 https://doi.org/10.1086/524984
journal April 2008
A Giant Metrewave Radio Telescope Multifrequency Radio Study of the Isothermal Core of the Poor Galaxy Cluster AWM 4 journal July 2008
THE zCOSMOS 20k GROUP CATALOG journal June 2012
A Catalog of 132,684 Clusters of Galaxies Identified from Sloan Digital sky Survey iii journal March 2012
The Morphology of Extragalactic Radio Sources of High and Low Luminosity journal April 1974
The acceleration of cosmic rays in shock fronts - I journal February 1978
The formation, numbers and radio output of giant radio galaxies journal July 1989
Radio spectral ageing in a random magnetic field journal March 1993
Morphologies in megaparsec-size powerful radio galaxies journal March 1996
Radio Galaxy Zoo: new giant radio galaxies in the RGZ DR1 catalogue journal September 2020
MIGHTEE: are giant radio galaxies more common than we thought? journal December 2020
Giant Metrewave Radio Telescope unveils steep-spectrum antique filaments in the galaxy cluster Abell 725 journal October 2021
MIGHTEE: Total intensity radio continuum imaging and the COSMOS / XMM-LSS Early Science fields journal October 2021
Giant radio galaxies in the LOw-Frequency ARray Two-metre Sky Survey Boötes deep field journal July 2022
Spectral age distribution for radio-loud active galaxies in the XMM-LSS field journal May 2023
MIGHTEE: the continuum survey Data Release 1 journal November 2024
Spectral ageing in the lobes of FR-II radio galaxies: new methods of analysis for broad-band radio data journal September 2013
Giant radio galaxies – I. Intergalactic barometers journal April 2013
The link between accretion mode and environment in radio-loud active galaxies journal September 2015
Spectral ageing in the lobes of cluster-centre FR II radio galaxies journal October 2015
Giant radio galaxies – II. Tracers of large-scale structure journal March 2015
A representative survey of the dynamics and energetics of FRII radio galaxies journal January 2017
RAiSE II: resolved spectral evolution in radio AGN journal October 2017
A simulation-based analytic model of radio galaxies journal January 2018
The Stripe 82 1–2 GHz Very Large Array Snapshot Survey: multiwavelength counterparts journal July 2018
Investigating the spectral age problem with powerful radio galaxies journal December 2019
First data release of the Hyper Suprime-Cam Subaru Strategic Program journal October 2017
The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies journal January 2006
Breaking the hierarchy of galaxy formation journal August 2006
PKS B1545−321: bow shocks of a relativistic jet? journal April 2008
Multifrequency VLA observations of the FR I radio galaxy 3C 31: morphology, spectrum and magnetic field journal May 2008
MRC B0319−454: probing the large-scale structure with a giant radio galaxy journal February 2009
Giant radio galaxies: Old long-lived quasars? journal December 2009
Observational Evidence of Active Galactic Nuclei Feedback journal September 2012
The Coevolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe journal August 2014
The MeerKAT Radio Telescope conference February 2018
The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory journal December 2017

Similar Records

MIGHTEE: total intensity radio continuum imaging and the COSMOS/XMM-LSS Early Science fields
Journal Article · 2021 · Monthly Notices of the Royal Astronomical Society · OSTI ID:1894152

MeerKAT view of the dancing ghosts – peculiar galaxy pair PKS 2130−538 in Abell 3785
Journal Article · 2023 · Monthly Notices of the Royal Astronomical Society · OSTI ID:2279787

The MeerKAT Galaxy Cluster Legacy Survey I. Survey Overview and Highlights
Journal Article · 2022 · Astronomy and Astrophysics · OSTI ID:1982287

Related Subjects