The Galactic Faraday rotation sky 2020
| العنوان: | The Galactic Faraday rotation sky 2020 |
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| المؤلفون: | Steve Croft, Tessa Vernstrom, Charles L. H. Hull, M. C. H. Wright, A. Clegg, Peter Williams, Bryan Gaensler, Jane F. Kaczmarek, George Heald, Subhashis Roy, Timothy W. Shimwell, C. Tasse, Allison H. Costa, G. C. Bower, Yik Ki Ma, C. J. Riseley, Makoto Inoue, Shane O'Sullivan, Torsten A. Enßlin, Charlotte Sobey, Sui Ann Mao, Jeroen Stil, Marcus Brüggen, C. J. Law, M. Haverkorn, Tracy E. Clarke, F. de Gasperin, C. L. Van Eck, R. Shanahan, Craig S. Anderson, V. Vacca, S. K. Betti, Sebastian Hutschenreuter, Jo-Anne Brown, Melanie Johnston-Hollitt, E. Carretti, Dave MacMahon |
| المصدر: | Astronomy & Astrophysics, 657, 1-14 Astronomy & Astrophysics, 657:A43 Astronomy & Astrophysics, 657, pp. 1-14 |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Physics, 010308 nuclear & particles physics, Galaxy: General, media_common.quotation_subject, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, Astrophysics - Astrophysics of Galaxies, Galaxy: Structure, symbols.namesake, ISM: Magnetic Fields, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Faraday effect, symbols, ISM: Structure, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common |
| الوصف: | This work gives an update to existing reconstructions of the Galactic Faraday rotation sky by processing almost all Faraday rotation data sets available at the end of the year 2020. Observations of extra-Galactic sources in recent years have, among other regions, further illuminated the previously under-constrained southern celestial sky, as well as parts of the inner disc of the Milky Way. This has culminated in an all-sky data set of 55,190 data points, which is a significant expansion on the 41,330 used in previous works, hence making an updated separation of the Galactic component a promising venture. The increased source density allows us to present our results in a resolution of about $1.3\cdot 10^{-2}\, \mathrm{deg}^2$ ($46.8\,\mathrm{arcmin}^2$), which is a twofold increase compared to previous works. As for previous Faraday rotation sky reconstructions, this work is based on information field theory, a Bayesian inference scheme for field-like quantities which handles noisy and incomplete data. In contrast to previous reconstructions, we find a significantly thinner and pronounced Galactic disc with small-scale structures exceeding values of several thousand $\mathrm{rad}\,\mathrm{m}^{-2}$. The improvements can mainly be attributed to the new catalog of Faraday data, but are also supported by advances in correlation structure modeling within numerical information field theory. We furthermore give a detailed discussion on statistical properties of the Faraday rotation sky and investigate correlations to other data sets. Comment: accepted in A&A; 15 pages, 12 Figures; results at https://wwwmpa.mpa-garching.mpg.de/~ensslin/research/data/faraday2020.htmlTest and http://cutouts.cirada.ca/rmcutoutTest |
| وصف الملف: | application/pdf |
| تدمد: | 1432-0746 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb34861166d0495863684e0e2f62f622Test http://hdl.handle.net/2066/246381Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....bb34861166d0495863684e0e2f62f622 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14320746 |
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