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Exploiting the XMM science archive; for X-ray galaxy cluster mass calibration and other astrophysical applications

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posted on 2023-06-10, 06:44 authored by David Turner
The exploitation of the X-ray archive of XMM is essential to the work of the XMM Cluster Survey (XCS), which makes use of the XMM archive to identify and quantify galaxy clusters. To that end, this thesis provides a detailed account of the design and capabilities of the new open-source Python module X-ray: Generate and Analyse (XGA). This software allows for the simple generation and analysis of XMM data products through its ‘source-based’ paradigm, where the user need only input a coordinate to select all observations relevant to that source. The application of XGA to the measurement of galaxy cluster hydrostatic masses is then presented, including measurement comparisons between XGA and published results. Once the veracity of XGA measurements has been demonstrated, mass measurements of mass for the SDSSRM-XCS sample are given. Following this, the assembly of the new ACTDR5-XMM sample is detailed and (along with clusters from the DESY3RM-XCS sample) new hydrostatic mass measurements are presented; this results in a combined sample of 334 unique clusters with hydrostatic masses. Next the first independent verification of the veracity of eROSITA galaxy cluster analyses is presented, making use of the eFEDS catalogues. XGA is used to construct a sample of 37 eFEDS galaxy clusters with XMM and HSC confirmation. Several failure modes of the eROSITA cluster finder are identified. X-ray luminosities measured using XMM and eROSITA data were found to be in excellent agreement, though XMM measured temperature were found to be (on average) 25% hotter than eROSITA. Finally, short summaries of other research projects undertaken during the course of this PhD are presented. This is followed by a final discussion of the contents of this thesis, alongside overviews of plannedfuture work that builds on the research performed during the PhD.

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  • Published version

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266.0

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  • Physics and Astronomy Theses

Qualification level

  • doctoral

Qualification name

  • phd

Language

  • eng

Institution

University of Sussex

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  • Yes

Legacy Posted Date

2023-04-25

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