High-resolution, High-sensitivity, Low-frequency uGMRT View of Coma Cluster of Galaxies

Abstract

We present high-resolution, high-sensitivity upgraded Giant Metrewave Radio Telescope observations of the Coma cluster (A1656) at 250-500 MHz and 550-850 MHz. At 250-500 MHz, 135 sources have extensions $>$ 0.45 arcmin (with peak-to-local-noise ratio $>4$). Of these, 24 sources are associated with Coma-member galaxies. In addition, we supplement this sample of 24 galaxies with 20 ram pressure stripped galaxies from Chen et al. (2020, eight are included in the original extended radio source sample) and an additional five are detected and extended. We present radio morphologies, radio spectra, spectral index maps, and equipartition properties for these two samples. In general, we find the equipartition properties lie within a narrow range (e.g., $P_{\min }$ = 1-3 dynes cm${}^{-2}$). Only NGC 4874, one of the two brightest central Coma cluster galaxies, has a central energy density and pressure about five times higher and a radio source age about 50 % lower than that of the other Coma galaxies. We find a diffuse tail of radio emission trailing the dominant galaxy of the merging NGC 4839 group that coincides with the "slingshot" tail, seen in X-rays. The southwestern radio relic, B1253$+$275, has a large extent $\approx$ 32${}^{\prime }$ $\times$ 10${}^{\prime }$ ($\simeq$ 1.08 $\times$ 0.34 Mpc${}^2$). For NGC 4789, whose long radio tails merge into the relic and may be a source of its relativistic seed electrons, and we find a transverse radio spectral gradient, a steepening from southwest to northeast across the width of the radio source. Finally, radio morphologies of the extended and RPS samples suggest that these galaxies are on their first infall into Coma on (predominantly) radial orbits.

arXiv comment35 pages (includes Appendices), 15 figures (includes 2 figures in Appendix, some Figures are of lower quality), 6 tables (includes 1 table in Appendix), accepted for publication in the Astrophysical Journal

References in corpus (48)

• Astropy: A Community Python Package for Astronomy
• Cosmic rays in galaxy clusters and their non-thermal emission
• Chandra temperature profiles for a sample of nearby relaxed galaxy clusters
• Diffuse Radio Emission from Galaxy Clusters
• Revised equipartition & minimum energy formula for magnetic field strength estimates from radio synchrotron observations
• XMM-Newton observations of the Perseus Cluster I: The temperature and surface brightness structure
• An Accurate Flux Density Scale from 50 MHz to 50 GHz
• Halpha Morphologies and Environmental Effects in Virgo Cluster Spiral Galaxies
• Ram Pressure Stripping in High-Density Environments
• The Case for Electron Re-Acceleration at Galaxy Cluster Shocks
• X-Ray surface brightness and gas density fluctuations in the Coma cluster
• Ultraviolet tails and trails in cluster galaxies: A sample of candidate gaseous stripping events in Coma
• VLA HI imaging of the brightest spiral galaxies in Coma
• A dozen new galaxies caught in the act: Gas stripping and extended emission line regions in the Coma cluster
• Acceleration of primary and secondary particles in galaxy clusters by compressible MHD turbulence: from radio halos to gamma rays
• Diffuse Radio Emission in/around the Coma Cluster: Beyond Simple Accretion
• X-ray thermal coronae of galaxies in hot clusters -- ubiquity of embedded mini cooling cores
• Dense Cloud Ablation and Ram Pressure Stripping of the Virgo Spiral NGC 4402
• Stochastic reacceleration of relativistic electrons by turbulent reconnection: a mechanism for cluster-scale radio emission ?
• Turbulence and Particle Acceleration in Giant Radio Haloes: the Origin of Seed Electrons
• The peculiar motions of early-type galaxies in two distant regions - II. The spectroscopic data
• The quenching of the star formation activity in cluster galaxies
• The NGC4839 group falling into the Coma cluster observed by XMM-Newton
• Zooming in on the Coma Cluster with Chandra: Compressed Warm Gas in the Brightest Cluster Galaxies
• Radio observations of ZwCl 2341.1+0000: a double radio relic cluster
• Thermodynamics of the Coma Cluster Outskirts
• LoTSS jellyfish galaxies: I. Radio tails in low redshift clusters
• HST and HI Imaging of Strong Ram Pressure Stripping in the Coma Spiral NGC 4921: Dense Cloud Decoupling and Evidence for Magnetic Binding in the ISM
• Ram pressure stripping candidates in the Coma Cluster: Evidence for enhanced star formation
• Evolution of Star Forming and Active Galaxies in Nearby Clusters
• The ram pressure stripped radio tails of galaxies in the Coma cluster
• The Coma cluster at LOFAR frequencies I: insights into particle acceleration mechanisms in the radio bridge
• Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales
• Tempestuous life beyond R_500: X-ray view on the Coma cluster with SRG/eROSITA. I. X-ray morphology, recent merger, and radio halo connection
• Shocks and non-thermal particles in clusters of galaxies
• A universal correlation between warm and hot gas in the stripped tails of cluster galaxies
• The survival and destruction of X-ray coronae of early-type galaxies in the rich cluster environments: a case study of Abell 1367
• Runaway Merger Shocks in Galaxy Cluster Outskirts and Radio Relics
• Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario
• The impact of the SZ effect on cm-wavelength (1-30 GHz) observation of galaxy cluster radio relics
• Transforming gas-rich low-mass disky galaxies into ultra-diffuse galaxies by ram pressure
• A New Class of X-Ray Tails of Early-Type Galaxies and Subclusters in Galaxy Clusters - Slingshot Tails vs Ram Pressure Stripped Tails
• A Deep VLA Radio Continuum Study of the Core and Outskirts of the Coma Cluster
• JVLA S and X-band Polarimetry of the Merging Cluster Abell 2256
• The X-ray coronae of the two brightest galaxies in the Coma cluster
• 3C 129 : The GMRT observations
• NGC 4869 in the Coma cluster: twist, wrap, overlap and bend
• Upgraded GMRT observations of the Coma cluster of galaxies: The observations

Cited by in corpus (10)

• LoTSS Jellyfish Galaxies IV: Enhanced Star Formation on the Leading Half of Cluster Galaxies and Gas Compression in IC3949
• Radio continuum tails in ram pressure-stripped spiral galaxies: experimenting with a semi-empirical model in Abell 2255
• Deep view of the intracluster light in the Coma cluster of galaxies
• Indications of an offset merger in Abell 3667
• A spatially resolved radio spectral study of the galaxy M 51
• Globular Clusters in NGC 4839 Falling into Coma: Evidence for the Second Infall?
• The structure of the giant radio fossil in the Ophiuchus galaxy cluster
• Perseus cluster in its X-ray entirety with SRG/eROSITA. Merger and Radio-Uroboroses
• Resurging from the ashes: A spectral study of seven candidate revived radio fossils in nearby low-mass galaxy clusters
• The Optical Properties of Host Galaxies of Radio Sources in the Coma Cluster