AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array

Kai-Yang Lin; Hiroaki Nishioka; Fu-Cheng Wang; Chih-Wei Locutus Huang; Yu-Wei Liao; Jiun-Huei Proty Wu; Patrick M. Koch; Keiichi Umetsu; Ming-Tang Chen; Shun-Hsiang Chan; Shu-Hao Chang; Wen-Hsuan Lucky Chang; Tai-An Cheng; Hoang Ngoc Duy; Szu-Yuan Fu; Chih-Chiang Han; Solomon Ho; Ming-Feng Ho; Paul T. P. Ho; Yau-De Huang; Homin Jiang; Derek Y. Kubo; Chao-Te Li; Yu-Chiung Lin; Guo-Chin Liu; Pierre Martin-Cocher; Sandor M. Molnar; Emmanuel Nunez; Peter Oshiro; Shang-Ping Pai; Philippe Raffin; Anthony Ridenour; Chia-You Shih; Sara Stoebner; Giap-Siong Teo; Jia-Long Johnny Yeh; Joshua Williams; Mark Birkinshaw

doi:10.3847/0004-637x/830/2/91

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arXiv · 1605.09261

AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array

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Abstract

The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is a co-planar interferometer array operating at a wavelength of 3mm to measure the Sunyaev-Zeldovich effect (SZE) of galaxy clusters. In the first phase of operation -- with a compact 7-element array with 0.6m antennas (AMiBA-7) -- we observed six clusters at angular scales from 5\arcmin to 23\arcmin. Here, we describe the expansion of AMiBA to a 13-element array with 1.2m antennas (AMiBA-13), its subsequent commissioning, and our cluster SZE observing program. The most important changes compared to AMiBA-7 are (1) array re-configuration with baselines ranging from 1.4m to 4.8m covering angular scales from 2\arcmin to 11.5\arcmin, (2) thirteen new lightweight carbon-fiber-reinforced plastic (CFRP) 1.2m reflectors, and (3) additional correlators and six new receivers. From the AMiBA-13 SZE observing program, we present here maps of a subset of twelve clusters. In highlights, we combine AMiBA-7 and AMiBA-13 observations of Abell 1689 and perform a joint fitting assuming a generalized NFW pressure profile. Our cylindrically integrated Compton-y values for this cluster are consistent with the BIMA/OVRA, SZA, and Planck results. We report the first targeted SZE detection towards the optically selected galaxy cluster RCS J1447+0828, and we demonstrate the ability of AMiBA SZE data to serve as a proxy for the total cluster mass. Finally, we show that our AMiBA-SZE derived cluster masses are consistent with recent lensing mass measurements in the literature.

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Kai-Yang Lin, Hiroaki Nishioka, Fu-Cheng Wang, Chih-Wei Locutus Huang, Yu-Wei Liao, Jiun-Huei Proty Wu, Patrick M. Koch, Keiichi Umetsu, Ming-Tang Chen, Shun-Hsiang Chan, Shu-Hao Chang, Wen-Hsuan Lucky Chang, Tai-An Cheng, Hoang Ngoc Duy, Szu-Yuan Fu, Chih-Chiang Han, Solomon Ho, Ming-Feng Ho, Paul T. P. Ho, Yau-De Huang, Homin Jiang, Derek Y. Kubo, Chao-Te Li, Yu-Chiung Lin, Guo-Chin Liu, Pierre Martin-Cocher, Sandor M. Molnar, Emmanuel Nunez, Peter Oshiro, Shang-Ping Pai, Philippe Raffin, Anthony Ridenour, Chia-You Shih, Sara Stoebner, Giap-Siong Teo, Jia-Long Johnny Yeh, Joshua Williams, Mark Birkinshaw. 2016-07-29. AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array. https://doi.org/10.3847/0004-637x%2F830%2F2%2F91

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