| Autor: |
McCall, Hannah, Reiprich, Thomas H., Veronica, Angie, Pacaud, Florian, Sanders, Jeremy, Edler, Henrik W., Brüggen, Marcus, Bulbul, Esra, de Gasparin, Francesco, Gatuzz, Efrain, Liu, Ang, Merloni, Andrea, Migkas, Konstantinos, Zhang, Xiaoyuan |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
A&A 689, A113 (2024) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1051/0004-6361/202449391 |
| Popis: |
As the closest galaxy cluster, the Virgo Cluster is an exemplary environment for the study of the large-scale filamentary structure and physical effects that are present in cluster outskirts but absent from the more easily studied inner regions. Here, we present an analysis of the SRG/eROSITA data from five all-sky surveys. eROSITA allows us to resolve the entire Virgo cluster and its outskirts on scales between 1 kpc and 3 Mpc, covering a total area on the sky of about 25$^\circ$ by 25$^\circ$. We utilized image manipulation techniques and surface brightness profiles to search for extended emission, surface brightness edges, and features in the outskirts. We employed a method of comparing mean and median profiles to measure gas clumping out to and beyond the virial radius. Surface brightness analysis of the cluster and individual sectors of the cluster reveal the full extent of previously identified cold fronts to the north and south. The emissivity bias due to gas clumping, which we quantify over three orders of magnitude in the radial range, is found to be mild, consistent with previous findings. We find uniform clumping measurements in all directions, with no enhancements along candidate filaments. We find an estimated virial gas mass of $M_{\mathrm{gas},rComment: 17 pages, 13 figures, Accepted by A&A |
| Databáze: |
arXiv |
| Externí odkaz: |
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