A MeerKAT survey of nearby dwarf novae: I. New detections
A MeerKAT survey of nearby dwarf novae: I. New detections
A program to search for radio emission from dwarf-novae-type cataclysmic variables was conducted with the South African MeerKAT radio telescope. The dwarf novae RU Pegasi, V426 Ophiuchi and IP Pegasi were detected during outburst at L-band (1284 MHz central frequency). Previously, only one cataclysmic variable was radio-detected at a frequency this low. We now bring the number to four. With these three newly found radio-emitters, the population of dwarf novae confirmed to be radio-emitting at any frequency reaches 10 systems. We found that the radio luminosity is correlated with the optical luminosity. For V426 Ophiuchi and RU Pegasi we found a radio decline contemporary with the outburst's optical decline. The peak radio luminosity of dwarf novae in outburst is very similar to that of novalike Cataclysmic Variables and no correlation with orbital period is seen.
astro-ph.HE, astro-ph.SR, binaries: eclipsing, radio continuum: transients, stars: individual: V426 Ophiuchi, stars: dwarf novae, stars: individual: IP Pegasi, stars: individual: RU Pegasi
1894-1907
Kersten, J.
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Körding, E.
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Woudt, P.A.
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Groot, P.J.
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Williams, D.R.A.
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Heywood, I.
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Coppejans, D.L.
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Knigge, C.
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Miller-Jones, J.C.A.
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Sivakoff, G.R.
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Fender, R.
cf9da54f-eb36-4c6d-89a6-f7a043103123
25 April 2025
Kersten, J.
48d12aef-c6e7-4503-8812-c96038becf0f
Körding, E.
3987e729-2059-4418-9f04-152b33921345
Woudt, P.A.
078a12fd-3894-42c5-b3b6-1747a9325c51
Groot, P.J.
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Williams, D.R.A.
9a3de5fb-bfa4-4735-b6c0-da519538d41e
Heywood, I.
40ca8042-c994-470b-96dd-34e1979ad84a
Coppejans, D.L.
adc2f046-49d4-4578-be5e-d353b062be29
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Miller-Jones, J.C.A.
73644f07-e012-4a1f-83e1-1c2ca6784982
Sivakoff, G.R.
9ce4db82-6900-4737-a08e-bb463cc8b169
Fender, R.
cf9da54f-eb36-4c6d-89a6-f7a043103123
Kersten, J., Körding, E., Woudt, P.A., Groot, P.J., Williams, D.R.A., Heywood, I., Coppejans, D.L., Knigge, C., Miller-Jones, J.C.A., Sivakoff, G.R. and Fender, R.
(2025)
A MeerKAT survey of nearby dwarf novae: I. New detections.
Monthly Notices of the Royal Astronomical Society, 539 (3), .
(doi:10.1093/mnras/staf556).
Abstract
A program to search for radio emission from dwarf-novae-type cataclysmic variables was conducted with the South African MeerKAT radio telescope. The dwarf novae RU Pegasi, V426 Ophiuchi and IP Pegasi were detected during outburst at L-band (1284 MHz central frequency). Previously, only one cataclysmic variable was radio-detected at a frequency this low. We now bring the number to four. With these three newly found radio-emitters, the population of dwarf novae confirmed to be radio-emitting at any frequency reaches 10 systems. We found that the radio luminosity is correlated with the optical luminosity. For V426 Ophiuchi and RU Pegasi we found a radio decline contemporary with the outburst's optical decline. The peak radio luminosity of dwarf novae in outburst is very similar to that of novalike Cataclysmic Variables and no correlation with orbital period is seen.
Text
2503.23838v1
- Author's Original
Text
staf556
- Version of Record
More information
Accepted/In Press date: 28 March 2025
e-pub ahead of print date: 4 April 2025
Published date: 25 April 2025
Keywords:
astro-ph.HE, astro-ph.SR, binaries: eclipsing, radio continuum: transients, stars: individual: V426 Ophiuchi, stars: dwarf novae, stars: individual: IP Pegasi, stars: individual: RU Pegasi
Identifiers
Local EPrints ID: 503712
URI: http://eprints.soton.ac.uk/id/eprint/503712
ISSN: 1365-2966
PURE UUID: 467d79b3-b3e0-4277-8342-97785daaeb5f
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Date deposited: 11 Aug 2025 16:41
Last modified: 30 Sep 2025 17:23
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Contributors
Author:
J. Kersten
Author:
E. Körding
Author:
P.A. Woudt
Author:
P.J. Groot
Author:
D.R.A. Williams
Author:
I. Heywood
Author:
D.L. Coppejans
Author:
J.C.A. Miller-Jones
Author:
G.R. Sivakoff
Author:
R. Fender
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