MAVERIC radio continuum sources from 26 GCs

Radio continuum observations offer a new window on compact objects in globular clusters compared to typical X-ray or optical studies. As part of the MAVERIC survey, we have used the Australia Telescope Compact Array to carry out a deep (median central noise level ~= 4 mJy beam^-1^) radio continuum survey of 26 southern globular clusters at central frequencies of 5.5 and 9.0 GHz. This paper presents a catalogue of 1285 radio continuum sources in the fields of these 26 clusters. Considering the surface density of background sources, we find significant evidence for a population of radio sources in seven of the 26 clusters, and also identify at least 11 previously known compact objects (six pulsars and five X-ray binaries). While the overall density of radio continuum sources with 7.25-GHz flux densities ~> 20 mJy in typical globular clusters is relatively low, the survey has already led to the discovery of several exciting compact binaries, including a candidate ultracompact black hole X-ray binary in 47 Tuc. Many of the unclassified radio sources near the centres of the clusters are likely to be true cluster sources, and multiwavelength follow-up will be necessary to classify these objects and better understand the demographics of accreting compact binaries in globular clusters.

Cone search capability for table J/MNRAS/513/3818/cluster (Globular clusters in our sample)

Cone search capability for table J/MNRAS/513/3818/table4 (Radio continuum sources across our 26 globular cluster fields)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/513/3818
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/513/3818
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/513/3818
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/513/3818
Provenance
Creator Tudor V.; Miller-Jones J.C.A.; Strader J.; Bahramian A.; Shishkovsky L.,Plotkin R.M.; Chomiuk L.; Heinke C.O.; Maccarone T.J.; Sivakoff G.R.,Tremou E.; Anderson G.E.; Russell T.D.; Tzioumis A.K.
Publisher CDS
Publication Year 2025
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; Interstellar medium; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy