AMiBA: Scaling relations between the integrated compton-y and X-ray-derived temperature, mass, and luminosity

Chih Wei Locutus Huang, Jiun Huei Proty Wu, Paul T.P. Ho, Patrick M. Koch, Yu Wei Liao, Kai Yang Lin, Guo Chin Liu, Sandor M. Molnar, Hiroaki Nishioka, Keiichi Umetsu, Fu Cheng Wang, Pablo Altamirano, Mark Birkinshaw, Chia Hao Chang, Shu Hao Chang, Su Wei Chang, Ming Tang Chen, Tzihong Chiueh, Chih Chiang Han, Yau De HuangYuh Jing Hwang, Homin Jiang, Michael Kesteven, Derek Kubo, Chao Te Li, Pierre Martin-Cocher, Peter Oshiro, Philippe Raffin, Tashun Wei, Warwick Wilson

Research output: Contribution to journalArticle (Academic Journal)peer-review

14 Citations (Scopus)

Abstract

We investigate the scaling relations between the X-ray and the thermal Sunyaev-Zel'dovich effect properties of clusters of galaxies, using data taken during 2007 by the Y. T. Lee Array for Microwave Background Anisotropy (AMiBA) at 94 GHz for the six clusters A1689, A1995, A2142, A2163, A2261, and A2390. The scaling relations relate the integrated Compton-y parameter Y 2500 to the X-ray-derived gas temperature T e, total mass M 2500, and bolometric luminosity LX within r 2500. Our results for the power-law index and normalization are both consistent with the self-similar model and other studies in the literature except for the Y 2500-LX relation, for which a physical explanation is given though further investigation may be still needed. Our results not only provide confidence for the AMiBA project but also support our understanding of galaxy clusters.

Original languageEnglish
Pages (from-to)758-765
Number of pages8
JournalAstrophysical Journal
Volume716
Issue number1
DOIs
Publication statusPublished - 1 Jan 2010

Keywords

  • Cosmic background radiation
  • Cosmology: observations
  • Galaxies: clusters: general
  • X-rays: galaxies: clusters

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