| Autor: |
S. Bhargava, C. Garrel, E. Koulouridis, M. Pierre, I. Valtchanov, N. Cerardi, M. Aguena, B. J. Maughan, C. Baguley, M. E. Ramos-Ceja, C. Adami, L. Chiappetti, C. Vignali, J. P. Willis |
| Rok vydání: |
2022 |
| DOI: |
10.5281/zenodo.7250909 |
| Popis: |
We perform the first known census of X-ray clusters that are undetected due to significant central AGN contamination. In recent work (Bhargava et al. 2022, submitted to A&A), we attempt to characterise all known AGN contaminated clusters within the XXL survey footprint and provide a systematic assessment of the cosmological impact of such systems. We find that 5% of genuine clusters within the XXL survey area are undetected due to AGN contamination - the majority of these clusters are above z > 0.6, where X-ray cluster detection efficiency drops significantly and cosmological AGN activity increases. With the increased sensitivity of Athena, we can expect to recover clusters at the current X-ray photon limit up to approximately z ~ 1.9. Hence, the fraction of clusters missed due to AGN is likely to be higher than 5%. Understanding the distribution of AGN and clusters in X-ray samples is therefore crucial to maximise the cosmological potential of clusters, particularly at high redshift. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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