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Título : Planck early results. XI. Calibration of the local galaxy cluster Sunyaev-Zeldovich scaling relations
Autor : Barreiro, R. Belén, Diego, J. M., Herranz, D., López-Caniego, M., Martínez-González, Enrique, Vielva, P.
Palabras clave : Galaxies: clusters: interacluster medium
X-rays: galaxies: clusters
Cosmology: observations
Fecha de publicación : Dec-2011
Editor: EDP Sciences
Resumen: We present precise Sunyaev-Zeldovich (SZ) effect measurements in the direction of 62 nearby galaxy clusters (z < 0.5) detected at high signal-to-noise in the first Planck all-sky data set. The sample spans approximately a decade in total mass, 2 × 1014 M⊙ < M500 < 2 × 1015 M⊙, where M500 is the mass corresponding to a total density contrast of 500. Combining these high quality Planck measurements with deep XMM-Newton X-ray data, we investigate the relations between DA2 Y500, the integrated Compton parameter due to the SZ effect, and the X-ray-derived gas mass Mg,500, temperature TX, luminosity LX,500, SZ signal analogue YX,500 = Mg,500 × TX, and total mass M500. After correction for the effect of selection bias on the scaling relations, we find results that are in excellent agreement with both X-ray predictions and recently-published ground-based data derived from smaller samples. The present data yield an exceptionally robust, high-quality local reference, and illustrate Planck’s unique capabilities for all-sky statistical studies of galaxy clusters.
Descripción : 14 páginas, 6 figuras, 2 tablas.-- Planck Collaboration: et al.
Versión del editor:
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201116458
Citación : Astronomy and Astrophysics 536: A11 (2011)
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