Quartier Agora

Nov 14, 2024 | aanda.org | Kriti Gupta |Universidad Diego Portales |Liege Université |Quartier Agora

Home All issues Volume 691 (November 2024) A&A, 691 (2024) A203 Full HTML Issue A&A Volume 691, November 2024 Article Number A203 Number of page(s) 40 Section Extragalactic astronomy DOI https://doi.org/10.1051/0004-6361/202450567 Published online 13 November 2024 A&A, 691, A203 (2024) BASS 1,2,3⋆, 1,4, 1, 5, 6,7, 1, 8,9, 10, 5,11, 12, 1,13, 14, 15, 16, 4,17, 18, 1, 19,20, 21, 22, 23 and 24 1 Instituto de Estudios Astrofísicos, Facultad de Ingeniería y Ciencias, Universidad Diego Portales,...

Aug 12, 2024 | academic.oup.com | Aix Marseille Université |Quartier Agora |Berklee College

As the most massive gravitationally bound structures in the Universe, galaxy clusters form relatively late in cosmic history at the nodes of the cosmic web (e.g. Zeldovich, Einasto & Shandarin 1982; de Lapparent, Geller & Huchra 1986) where streams of matter fall into dense cluster cores (e.g. Klypin & Shandarin 1983; Diaferio & Geller 1997; Springel et al. 2005; Dubois et al. 2014; Ata et al. 2022).

Sep 29, 2023 | academic.oup.com | George Mason |Universidad Diego Portales |Quartier Agora

Most Active Galactic Nuclei (AGN) in the local universe are obscured. In these obscured AGN an excess is usually observed in the soft X-rays below ∼2 keV above the absorbed X-ray continuum. This spectral component is associated with the scattering of X-ray photons off free electrons in the Narrow Line Region (NLR), and/or to photoionised lines. Recent studies have found that in highly obscured AGN this component has lower flux relative to the primary X-ray continuum than in less obscured AGN.