TRAPUM upper limits on pulsed radio emission for SMC X-ray pulsar J0058−7218

E Carli, L Levin, B W Stappers, E D Barr, R P Breton, S Buchner, M Burgay, M Kramer, P V Padmanabh, A Possenti, V Venkatraman Krishnan, J Behrend, D J Champion, W Chen, Y P Men

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The TRAPUM collaboration has used the MeerKAT telescope to conduct a search for pulsed radio emission from the young Small Magellanic Cloud pulsar J0058−7218 located in the supernova remnant IKT 16, following its discovery in X-rays with XMM-Newton. We report no significant detection of dispersed, pulsed radio emission from this source in three 2-hour L-band observations using the core dishes of MeerKAT, setting an upper limit of 7.0 μJy on its mean flux density at 1284 MHz. This is nearly 7 times deeper than previous radio searches for this pulsar in Parkes L-band observations. This suggests that the radio emission of PSR J0058−7218 is not beamed towards Earth or that PSR J0058−7218 is similar to a handful of Pulsar Wind Nebulae systems that have a very low radio efficiency, such as PSR B0540−6919, the Large Magellanic Cloud Crab pulsar analogue. We have also searched for bright, dispersed, single radio pulses and found no candidates above a fluence of 93 mJy ms at 1284 MHz.
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Early online date10 Oct 2022
Publication statusPublished - 10 Oct 2022


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