The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array
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...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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OXFORD UNIV PRESS
2022
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| Online Access: | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/91517 |
| _version_ | 1848765536127680512 |
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| author | 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. |
| author_facet | 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. |
| author_sort | Tudor, V. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T11:36:48Z |
| format | Journal Article |
| id | curtin-20.500.11937-91517 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:36:48Z |
| publishDate | 2022 |
| publisher | OXFORD UNIV PRESS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-915172023-05-11T03:13:57Z The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array 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. Science & Technology Physical Sciences Astronomy & Astrophysics globular clusters: general pulsars: general radio continuum: general surveys X-rays: binaries X-RAY BINARIES MASS BLACK-HOLES DENSE STAR-CLUSTERS MILKY-WAY MILLISECOND PULSARS NEUTRON-STAR CONTINUUM OBSERVATIONS CATACLYSMIC VARIABLES SIMULTANEOUS CHANDRA VLA OBSERVATIONS astro-ph.HE astro-ph.HE 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. 2022 Journal Article http://hdl.handle.net/20.500.11937/91517 10.1093/mnras/stac1034 English http://purl.org/au-research/grants/arc/FT140101082 OXFORD UNIV PRESS fulltext |
| spellingShingle | Science & Technology Physical Sciences Astronomy & Astrophysics globular clusters: general pulsars: general radio continuum: general surveys X-rays: binaries X-RAY BINARIES MASS BLACK-HOLES DENSE STAR-CLUSTERS MILKY-WAY MILLISECOND PULSARS NEUTRON-STAR CONTINUUM OBSERVATIONS CATACLYSMIC VARIABLES SIMULTANEOUS CHANDRA VLA OBSERVATIONS astro-ph.HE astro-ph.HE 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. The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array |
| title | The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array |
| title_full | The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array |
| title_fullStr | The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array |
| title_full_unstemmed | The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array |
| title_short | The MAVERIC survey: a catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array |
| title_sort | maveric survey: a catalogue of radio sources in southern globular clusters from the australia telescope compact array |
| topic | Science & Technology Physical Sciences Astronomy & Astrophysics globular clusters: general pulsars: general radio continuum: general surveys X-rays: binaries X-RAY BINARIES MASS BLACK-HOLES DENSE STAR-CLUSTERS MILKY-WAY MILLISECOND PULSARS NEUTRON-STAR CONTINUUM OBSERVATIONS CATACLYSMIC VARIABLES SIMULTANEOUS CHANDRA VLA OBSERVATIONS astro-ph.HE astro-ph.HE |
| url | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/91517 |