Galaxy clusters and groups in the ALHAMBRA survey

Ascaso, B.; Quintana, J. M.; Prada, F.; Husillos, C.; Infante, L.; Hurtado-Gil, L.; Delgado, R. M. González; Cristóbal-Hornillos, D.; Cerviño, M.; Cabrera-Caño, J.; Castander, F. J.; Cepa, J.; Broadhurst, T.; Aparicio-Villegas, T.; Alfaro, E.; Perea, J.; Moles, M.; Olmo, A. Del; Viironen, K.; Aguerri, J. A. L.; Varela, J.; Pović, M.; Masegosa, J.; Nieves-Seoane, L.; Márquez, I.; Dupke, R.; Cenarro, A. J.; Martínez, V. J.; Díaz-García, L. A.; Merson, A. I.; Huertas-Company, M.; Jiménez-Teja, Y.; Schoenell, W.; Molino, A.; López-Sanjuan, C.; Arnalte-Mur, P.; Fernández-Soto, A.; Benítez, N.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society, Volume 452, Issue 1, p.549-565

Fecha de publicación:
9
2015
Número de autores
38
Número de autores del IAC
3
Número de citas
17
Número de citas referidas
17
Descripción
We present a catalogue of 348 galaxy clusters and groups with 0.2 < z < 1.2 selected in the 2.78 deg2 Advanced Large, Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) survey. The high precision of our photometric redshifts, close to 1 per cent, and the wide spread of the seven ALHAMBRA pointings ensure that this catalogue has better mass sensitivity and is less affected by cosmic variance than comparable samples. The detection has been carried out with the Bayesian Cluster Finder, whose performance has been checked in ALHAMBRA-like light-cone mock catalogues. Great care has been taken to ensure that the observable properties of the mocks photometry accurately correspond to those of real catalogues. From our simulations, we expect to detect galaxy clusters and groups with both 70 per cent completeness and purity down to dark matter halo masses of Mh ˜ 3 × 1013 M⊙ for z < 0.85. Cluster redshifts are expected to be recovered with ˜0.6 per cent precision for z < 1. We also expect to measure cluster masses with σ _{M_h|M^*_{CL}}˜ 0.25-0.35 dex precision down to ˜ 3 × 1013 M⊙, masses which are 50 per cent smaller than those reached by similar work. We have compared these detections with previous optical, spectroscopic and X-rays work, finding an excellent agreement with the rates reported from the simulations. We have also explored the overall properties of these detections such as the presence of a colour-magnitude relation, the evolution of the photometric blue fraction and the clustering of these sources in the different ALHAMBRA fields. Despite the small numbers, we observe tentative evidence that, for a fixed stellar mass, the environment is playing a crucial role at lower redshifts (z < 0.5).
Proyectos relacionados
Abell 370 se encuentra a aproximadamente 4 mil millones de años luz de distancia en la constelación de Cetus, el monstruo marino
Evolución de Galaxias en Cúmulos
Las estructuras en el Universo, a todas las escalas de masa, se han formado de una forma jerárquica y principalmente producidas por fusiones de galaxias. Sin embargo, esta formación jerárquica de las galaxias está modulada por el entorno en el cual se crean y evolucionan. Mientras que las galaxias de campo presentan una evolución pasiva, los
Jairo
Méndez Abreu
Project Image
Evolución de Galaxias
El estudio de la evolución de las galaxias es un tema crucial de la Astronomía Extragaláctica moderna. Permite vincular las galaxias locales con las primeras que existieron en el universo. Pero para poder abordarlo es preciso obtener censos estadísticamente significativos de galaxias de distintas luminosidades, a distintas distancias
Jorge
Cepa Nogue