The evolution of the Y -M scaling relation in MUSIC clusters

• Published in: Astronomische Nachrichten Vol. 334; no. 4-5; pp. 441 - 444
• Main Authors: Sembolini, F., Yepes, G., De Petris, M., Gottlöber, S., Lamagna, L., Comis, B.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.05.2013; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Subjects: Astrophysics; Clusters; Cooling effects; cosmic microwave background; Evolution; Galactic clusters; galaxies: clusters: general; methods: N-body simulations; Red shift; Reproduction; Self-similarity; Stars & galaxies; Sunyaev-Zeldovich effect
• ISSN: 0004-6337; 1521-3994
• DOI: 10.1002/asna.201211875

This work describes the baryon content and Sunyaev‐Zeldovich properties of the MUSIC (Marenostrum‐MultiDark SIm‐ulations of galaxy clusters) dataset and their evolution with redshift and aperture radius. The MUSIC dataset is one of the largest samples of hydrodynamically simulated galaxy clusters (more than 2000 objects, including more than 500 clusters). We show that when the effects of cooling and stellar feedbacks are properly taken into account, the gas fraction of the MUSIC clusters consistently agrees with recent observational results. Moreover, the gas fraction has a net dependence with the total mass of the cluster and increases slightly with redshift at high overdensities. The study of the Y –M relation confirms the consistence of the self‐similar model, showing no evolution with redshift at low overdensities. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)