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dc.contributor.author | Ranchod, Shilpa![]() |
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dc.contributor.author | Mao, S. A.![]() |
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dc.contributor.author | Deane, Roger![]() |
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dc.contributor.author | Sridhar, Sarrvesh S.![]() |
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dc.contributor.author | Damas-Segovia, Ancor![]() |
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dc.contributor.author | Livingston, Jack![]() |
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dc.contributor.author | Ma, Y. K.![]() |
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dc.date.accessioned | 2024-08-22T11:41:44Z | |
dc.date.available | 2024-08-22T11:41:44Z | |
dc.date.issued | 2024-06 | |
dc.description.abstract | The S -band Polarisation All Sky Survey (SPASS/ATCA) rotation measure (RM) catalogue is the largest broadband RM catalogue to date, increasing the RM density in the sparse southern sky. Through analysis of this catalogue, we report a latitude dependency of the Faraday complexity of polarised sources in this catalogue within 10◦ of the Galactic plane towards the inner Galaxy. In this study, we aim to investigate this trend with follow-up observations using the Australia Telescope Compact Array (ATCA). We observe 95 polarised sources from the SPASS/ATCA RM catalogue at 1.1–3.1 GHz with ATCA’s 6 km configuration. We present Stokes QU fitting results and a comparative analysis with the SPASS/ATCA catalogue. We find an overall decrease in complexity in these sources with the higher angular resolution observations, with a complexity fraction of 42%, establishing that the majority of the complexity in the SPASS/ATCA sample is due to the mixing-in of diffuse Galactic emission at scales θ > 2.8 0 . Furthermore, we find a correlation between our observed small-scale complexity θ < 2.8 0 and the Galactic spiral arms, which we interpret to be due to Galactic turbulence or small-scale polarised emission. These results emphasise the importance of considering the maximum angular scale to which the observations are sensitive in the classification of Faraday complexity; the effect of which can be more carefully investigated with SKA-precursor and pathfinder arrays (e.g. MeerKAT and ASKAP). | en_US |
dc.description.department | Physics | en_US |
dc.description.sdg | None | en_US |
dc.description.uri | http://www.hanspub.org/Journal/AAS.html | en_US |
dc.identifier.citation | Ranchod, S., Mao, S.A., Deane, R. et al. 2024, 'The Galactic latitude dependency of faraday complexity in the S-PASS/ATCA RM catalogue', Astronomy and Astrophysics, vol. 686, art. A104, pp. 1-16, doi : 10.1051/0004-6361/202348993. | en_US |
dc.identifier.issn | 2329-1273 (print) | |
dc.identifier.issn | 2329-1265 (online) | |
dc.identifier.other | 10.1051/0004-6361/202348993 | |
dc.identifier.uri | http://hdl.handle.net/2263/97822 | |
dc.language.iso | en | en_US |
dc.publisher | EDP Sciences | en_US |
dc.rights | © 2024. The Authors. | en_US |
dc.subject | Polarization – techniques | en_US |
dc.subject | Polarimetric – Galaxy | en_US |
dc.subject | General – radio continuum | en_US |
dc.subject | Galaxies | en_US |
dc.title | The Galactic latitude dependency of faraday complexity in the S-PASS/ATCA RM catalogue | en_US |
dc.type | Article | en_US |