Natasha Hurley-Walker (Curtin)Natasha Hurley-Walker Colloquium |
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The Australia Telescope National Facility Colloquium | |||
15:00-16:00 Wed 22 Mar 2023 | |||
Kensington |
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AbstractSKA pathfinder instruments are probing the radio sky in new ways, probing the sky on timescales hitherto poorly-explored. Sensitive image-plane surveys are discovering new kinds of radio transients, with unusual temporal, spectral, and polarisation properties. Two intriguing periodic transients were published last year: a pulsar-like object repeating every 76s that is growing fainter with time (Caleb et al. 2022), and a short-lived radio transient repeating every 18 minutes (Hurley-Walker et al. 2022a). Both are potential examples of “ultra-long period” (ULP) magnetars, and their radio emission might be explained by a temporary twisting and/or reorganisation of their intense magnetic fields.
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