Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Magnetar"”.
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The nature of fast radio bursts
… can produce FRBs in the relativistic wind of a magnetar. We determine the lower limits on the wind Lorentz factors (γw ≳ 310) necessary to explain observed FRBs. Emission is possible at temperatures of θ = kBT/mc2 ≲ 0.02. We further examine the periods and magnetic fields of the central magnetar …
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Search and multi-frequency follow-up studies of radio transients: novel approaches and large campaigns
… towards highly magnetised neutron stars, such as magnetars, as the putative sources behind at least some of them. In particular, on April 2020 the Galactic magnetar SGR J1935+2154 emitted a radio flash closely resembling the ones produced by the FRBs, with simultaneous detections in the X-rays. …
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Core-collapse supernovae: neutrino-dark matter phenomenology and probes of internal physics
… from the decays of unstable nuclei in proto-magnetar jets. The abundance distribution of the unstable nuclei depends directly on the neutrino emission, which controls the electron fraction, as well as properties of the proto-magnetar. We find that different proto-magnetar properties produce …
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The radiation mechanism of fast radio bursts
… by magnetic reconnection near the surface of a magnetar (B ≳ 10¹⁴ G). We show that the plasma in the twisted magnetosphere of a magnetar may be clumpy due to two-stream instability. When magnetic reconnection occurs, the pre-existing density clumps may provide charge bunches for the antenna …
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Polarized Radiative Transfer in the Magnetospheres and Atmospheres of Neutron Stars
… of highly magnetized neutron stars like magnetars, calculating attenuation lengths and determining escape energies, which are the maximum photon energies for transparency out to infinity. These opacity calculations put constraints on the possible emission locales and the strengths of the …
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Investigating the nature of Peculiar Supernovae and Fast Radio Bursts via their multi-wavelength properties and environments
… PRSs were identified and may align with magnetar or hypernebula models.For SLSNe, I analyzed multi-wavelength data from a luminous interacting supernova, PS1-11aop, discovered by the Pan-STARRS1 Medium Deep Survey. I then performed a detailed study of PS1-11aop, unveiling a dense shell …
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Multiwavelength Studies of Rotating Radio Transients
… neutron star populations like the X-ray bright magnetars. However, some of the RRATs have spin-down properties very similar to those of normal pulsars, making it difficult to determine the cause of their unusual emission and possible evolutionary relationships between them and other classes of …
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Procedure di modellizzazione rapide per la caratterizzazione di Supernovae Core Collapse e di transienti similari
… la presenza di un oggetto compatto (ad esempio, Magnetar o Buchi Neri) nei casi energeticamente estremi come le SLSNe. Al fine di migliorare la comprensione di questi fenomeni, queste procedure di modellizzazione sono state utilizzate per analizzare diversi gruppi di SNe con un campionamento …