Deep uGMRT 250-850MHz view of Coma cluster galaxies

We present high-resolution, high-sensitivity upgraded Giant Metrewave Radio Telescope observations of the Coma cluster (A1656) at 250-500MHz and 550-850MHz. At 250-500MHz, 135 sources have extensions >0.45' (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 (RPS) galaxies from (Chen+ 2020, J/MNRAS/496/4654), 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_=1-3x10^-13^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 ~32'x10' (~1.08x0.34Mpc^2^). For NGC 4789, whose long radio tails merge into the relic and may be a source of its relativistic seed electrons, 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.

Cone search capability for table J/ApJ/934/170/table3 (Radio properties of the 24 extended (>~12.6kpc) Coma cluster-member sources detected using the uGMRT)

Cone search capability for table J/ApJ/934/170/table4 (Radio properties of the ram pressure stripped (RPS) galaxies in the Coma cluster field observed using the uGMRT)

Cone search capability for table J/ApJ/934/170/tablea1 (Summary of the nature of radio sources in the Coma cluster field using the uGMRT)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/934/170
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/934/170
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/934/170
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/934/170
Provenance
Creator Lal D.V.; Lyskova N.; Zhang C.; Venturi T.; Forman W.R.; Jones C.,Churazov E.M.; van Weeren R.J.; Bonafede A.; Miller N.A.; Roberts I.D.,Bykov A.M.; Di Mascolo L.; Bruggen M.; Brunetti G.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics