Lucy Oswald: Publications

A broad-band perspective on circular polarization in radio pulsar observations

Proceedings of the International Astronomical Union Cambridge University Press (CUP) 16:S363 (2020) 332-334

The Thousand-Pulsar-Array programme on MeerKAT - I. Science objectives and first results

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 493:3 (2020) 3608-3615

Authors:

Simon Johnston, A Karastergiou, MJ Keith, X Song, P Weltevrede, F Abbate, M Bailes, S Buchner, F Camilo, M Geyer, B Hugo, A Jameson, M Kramer, A Parthasarathy, DJ Reardon, A Ridolfi, M Serylak, RM Shannon, R Spiewak, W van Straten, V Venkatraman Krishnan, F Jankowski, BW Meyers, L Oswald, B Posselt, C Sobey, A Szary, J van Leeuwen

Understanding the radio beam of PSR J1136+1551 through its single pulses

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 489:1 (2019) 310-324

Authors:

Lucy Oswald, Aris Karastergiou, Simon Johnston

Abstract:

ABSTRACT The frequency widening of pulsar profiles is commonly attributed to lower frequencies being produced at greater heights above the surface of the pulsar; so-called radius-to-frequency mapping (RFM). The observer’s view of pulsar emission is a 1D cut through a 3D magnetosphere: we can only see that emission which points along our line of sight. However, by comparing the frequency evolution of many single pulses positioned at different phases, we can build up an understanding of the shape of the active emission region. We use single pulses observed with the Giant Metrewave Radio Telescope to investigate the emission region of PSR J1136+1551 and test RFM. Assuming that emission is produced tangential to the magnetic field lines and that each emission frequency corresponds to a single height, we simulate the single pulse profile evolution resulting from the canonical conal beam model and a fan beam model. Comparing the results of these simulations with the observations, we conclude that the emission region of PSR J1136+1551 is better described by the fan beam model. The diversity of profile widening behaviour observed for the single pulses can be explained by orthogonally polarized modes propagating along differing frequency-dependent paths in the magnetosphere.

Models of gravitational lens candidates from Space Warps CFHTLS

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 474:3 (2018) 3700-3713

Authors:

R Kung, P Saha, I Ferreras, E Baeten, J Coles, C Cornen, C Macmillan, P Marshall, A More, L Oswald, A Verma, JK Wilcox

Understanding pulsar magnetospheres with the SKA

(2014)

Authors:

A Karastergiou, S Johnston, N Andersson, R Breton, P Brook, C Gwinn, N Lewandowska, E Keane, M Kramer, J-P Macquart, M Serylak, R Shannon, B Stappers, J van Leeuwen, JPW Verbiest, P Weltevrede, G Wright

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Lucy Oswald

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A broad-band perspective on circular polarization in radio pulsar observations

The Thousand-Pulsar-Array programme on MeerKAT - I. Science objectives and first results

Authors:

Understanding the radio beam of PSR J1136+1551 through its single pulses

Authors:

Abstract:

Models of gravitational lens candidates from Space Warps CFHTLS

Authors:

Understanding pulsar magnetospheres with the SKA

Authors:

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Lucy Oswald

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A broad-band perspective on circular polarization in radio pulsar observations

The Thousand-Pulsar-Array programme on MeerKAT - I. Science objectives and first results

Authors:

Understanding the radio beam of PSR J1136+1551 through its single pulses

Authors:

Abstract:

Models of gravitational lens candidates from Space Warps CFHTLS

Authors:

Understanding pulsar magnetospheres with the SKA

Authors:

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