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    The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array

    91341.pdf (5.516Mb)
    Access Status
    Open access
    Authors
    Tudor, V.
    Miller-Jones, James
    Strader, J.
    Bahramian, Arash
    Shishkovsky, L.
    Plotkin, Richard
    Chomiuk, L.
    Heinke, C.O.
    Maccarone, T.J.
    Sivakoff, G.R.
    Tremou, E.
    Anderson, Gemma
    Russell, T.D.
    Tzioumis, A.K.
    Date
    2022
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Tudor, V. and Miller-Jones, J.C.A. and Strader, J. and Bahramian, A. and Shishkovsky, L. and Plotkin, R.M. and Chomiuk, L. et al. 2022. The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array. Monthly Notices of the Royal Astronomical Society. 513 (3): pp. 3818-3835.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stac1034
    ISSN
    0035-8711
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT140101082
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2022 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/91517
    Collection
    • Curtin Research Publications
    Abstract

    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 surv e y, we hav e used the Australia Telescope Compact Array to carry out a deep (median central noise level ≈4 μJy beam -1 ) radio continuum surv e y 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 pre viously kno wn compact objects (six pulsars and five X-ray binaries). While the overall density of radio continuum sources with 7.25-GHz flux densities 20 μJy in typical globular clusters is relatively low, the surv e y has already led to the disco v ery of sev eral e xciting 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.

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