Por favor, use este identificador para citar o enlazar este ítem:
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1540| Breaking the σ₈–Ωₘ degeneracy using the clustering of HIGH-𝓏 x-ray active galactic nuclei | |
| Manolis Plionis | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Cosmological parameters Large-scale structure of universe | |
| The clustering of X-ray selected active galactic nuclei (AGNs) appears to be a valuable tool for extracting cosmological information. Using the recent high-precision angular clustering results of ∼30,000 XMM-Newton soft (0.5–2 keV) X-ray sources, which have a median redshift of 𝓏 ∼ 1, and assuming a flat geometry, a constant in comoving coordinates AGN clustering evolution, and the AGN bias evolution model of Basilakos et al., we manage to break the σ₈–Ωₘ degeneracy. The resulting cosmological constraints are Ωₘ = 0.27⁺⁰˙⁰³₋₀.₀₅, w = −0.90⁺⁰˙¹⁰₋₀.₁₆, and σ₈ = 0.74⁺⁰˙¹⁴₋₀.₁₂, while the dark matter host halo mass, in which the X-ray selected AGNs are presumed to reside, is M = 2.50⁺⁰˙⁵⁰₋₁.₅₀,×10¹³ h⁻¹M⊙ . For the constant Λ model (w = −1) we find Ωₘ = 0.24±0.06 and σ₈= 0.83⁺⁰˙¹¹₋₀.₁₆, in good agreement with recent studies based on cluster abundances, weak lensing, and the cosmic microwave background, but in disagreement with the recent bulk flow analysis. | |
| The Astrophysical Journal Letters | |
| 10-05-2010 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Basilakos, Spyros and Plionis, Manolis, (2010), Breaking the σ₈–Ωₘ degeneracy using the clustering of HIGH-𝓏 x-ray active galactic nuclei, The Astrophysical Journal Letters, Vol.714(2):L185–L189 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
Cargar archivos:
| Fichero | Tamaño | Formato | |
|---|---|---|---|
| 41.-A.pdf | 239.36 kB | Adobe PDF | Visualizar/Abrir |