Feedback in the merging galaxy group NGC6338
arXiv:2303.08833 · doi:10.3847/1538-4357/acc52e
Abstract
The galaxy group NGC6338 is one of the most violent group-group mergers known to date. While the central dominant galaxies rush at each other at 1400km/s along the line of sight, with dramatic gas heating and shock fronts detected, the central gas in the BCGs remains cool. There are also indications of feedback from active galactic nuclei (AGNs), and neither subcluster core has been disrupted. With our deep radio uGMRT data at 383MHz and 650MHz we clearly detect a set of large, old lobes in the southern BCG coinciding with the X-ray cavities, while the northern, and smaller BCG appears slightly extended in the radio. The southern BCG also hosts a smaller younger set of lobes, perpendicular to the larger lobes, but also coinciding with the inner X-ray cavities, and matching the jet direction in the parsec-resolution VLBA image. Our spectral analysis confirms the history of two feedback cycles. The high radio frequency analysis classifies the compact source in the southern BCG with a powerlaw, while ruling out a significant contribution from accretion. The radio lightcurve over 3 decades shows a change about 10 years ago, which might be related to ongoing feedback in the core. The southern BCG in the NGC6338 merger remains another prominent case where the direction of jet-mode feedback between two cycles changed dramatically.
arXiv comment19 pages, 12 figures, accepted for publication in ApJ
References in corpus (67)
- Astropy: A Community Python Package for Astronomy
- emcee: The MCMC Hammer
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- The Cosmic Baryon Budget
- WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
- A Systematic Study of Radio-Induced X-ray Cavities in Clusters, Groups, and Galaxies
- Molecular Gas at High Redshift
- Evolution of Buoyant Bubbles in M87
- Chandra X-ray Observations of the Hydra A Cluster: An Interaction Between the Radio Source and the X-Ray-Emitting Gas
- A Textbook Example of a Bow Shock in the Merging Galaxy Cluster 1E0657-56
- Magnetic Field in Clusters of Galaxies
- The ROSAT Brightest Cluster Sample (BCS): -- III. Optical spectra of the central cluster galaxies
- An Accurate Flux Density Scale from 50 MHz to 50 GHz
- Ionospheric Calibration of Low Frequency Radio Interferometric Observations using the Peeling Scheme: I. Method Description and First Results
- Filaments, Bubbles, and Weak Shocks in the Gaseous Atmosphere of M87
- Scaling Laws for Advection Dominated Flows: Applications to Low Luminosity Galactic Nuclei
- An Infrared Survey of Brightest Cluster Galaxies. II: Why are Some Brightest Cluster Galaxies Forming Stars?
- A Jet-ADAF model for Sgr A*
- Cold molecular gas in cooling flow clusters of galaxies
- Compact steep-spectrum and peaked-spectrum radio sources
- Extragalactic Peaked-Spectrum Radio Sources at Low Frequencies
- On the evolution of young radio-loud AGN
- The origin of cold gas in giant elliptical galaxies and its role in fueling radio-mode AGN feedback
- Magnetic Field Amplification in Galaxy Clusters and its Simulation
- Revisiting the Cooling Flow Problem in Galaxies, Groups, and Clusters of Galaxies
- Heating the hot atmospheres of galaxy groups and clusters with cavities: the relationship between jet power and low-frequency radio emission
- Feedback from Active Galactic Nuclei in Galaxy Groups
- X-Ray morphological analysis of the Planck ESZ clusters
- In search of dying radio sources in the local universe
- A Parameter Space Exploration of Galaxy Cluster Mergers I: Gas Mixing and the Generation of Cluster Entropy
- Spectral Ages of CSOs and CSS Sources
- A census of cool core galaxy clusters in IllustrisTNG
- Molecular Gas in the X-ray Bright Group NGC 5044 as Revealed by ALMA
- Cooling flow solutions for the circumgalactic medium
- Non-thermal processes in cosmological simulations
- Spectral ageing in the lobes of cluster-centre FR-II radio galaxies
- An infrared survey of brightest cluster galaxies: Paper I
- Galaxy Groups in the 2dFGRS: the number density of groups
- A volume-limited sample of X-ray galaxy groups and clusters - II. X-ray cavity dynamics
- Outer-disk reddening and gas-phase metallicities: The CALIFA connection
- Pairwise Velocities of Dark Matter Halos: a Test for the Lambda Cold Dark Matter Model using the Bullet Cluster
- The Fate of Stellar Mass Loss in Central Cluster Galaxies
- New candidate GHz Peaked Spectrum and Compact Steep Spectrum Sources
- High Radio Frequency Properties and Variability of Brightest Cluster Galaxies
- Cold gas in a complete sample of group-dominant early-type galaxies
- LOFAR Observations of X-ray Cavity Systems
- The most massive black holes on the Fundamental Plane of Black Hole Accretion
- CALIFA reveals Prolate Rotation in Massive Early-type Galaxies: A Polar Galaxy Merger Origin?
- Statistics and implications of substructure detected in a representative sample of X-ray clusters
- The Presence of Thermally Unstable X-ray Filaments and the Production of Cold Gas in the NGC 5044 Group
- The impact of sloshing on the intra-group medium and old radio lobe of NGC 5044
- NGC 741 - Mergers and AGN feedback on galaxy group scale
- Spectral Variability of Radio Sources at Low Frequencies
- A GMRT multifrequency radio study of the isothermal core of the poor galaxy cluster AWM 4
- Building a cluster: shocks, cavities, and cooling filaments in the group-group merger NGC 6338
- A study of cool core resiliency and entropy mixing in simulations of galaxy cluster mergers
- Synchrotron Spectra and Ages of Compact Steep Spectrum Radio Sources
- The unusually weak and exceptionally steep radio relic in Abell 2108
- The relationship between radio power at 22 and 43 GHz and black hole properties of AGN in elliptical galaxies
- Atacama Compact Array Measurements of the Molecular Mass in the NGC 5044 Cooling Flow Group
- SoUthern Cluster sCale Extended Source Survey (SUCCESS): A GMRT and MeerKAT study of nine massive galaxy clusters
- The Complete Local Volume Groups Sample -- IV. Star formation and gas content in group-dominant galaxies
- A new feedback cycle in the archetypal cooling flow group NGC 5044
- The University of Michigan Centimeter-Band All Stokes Blazar Monitoring Program: Single-Dish Polarimetry as a Probe of Parsec-Scale Magnetic Fields
- SDSS IV MaNGA: Discovery of an blob associated with a dry galaxy pair -- ejected gas or a `dark' galaxy candidate?
- Revealing A Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA observations
- SDSS-IV MaNGA: The Nature of an Off-galaxy H Blob -- A Multi-wavelength View of Offset Cooling in a Merging Galaxy Group