Mapping the hot gas temperature in galaxy clusters using X-ray and Sunyaev-Zel'dovich imaging
Mapping the hot gas temperature in galaxy clusters using X-ray and Sunyaev-Zel'dovich imaging
复制标题
使用 X 射线和 Sunyaev-Zeldovich 成像绘制星系团中的热气体温度
DOI:
10.1051/0004-6361/201629810
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发表时间:
2017
影响因子:
6.5
通讯作者:
Adam R
中科院分区:
文献类型:
--
作者:
Adam R
We propose a method to map the temperature distribution of the hot gas in galaxy clusters that uses resolved images of the thermal Sunyaev-Zel’dovich (tSZ) effect in combination with X-ray data. Application to images from the New IRAM KIDs Array (NIKA) andXMM-Newtonallows us to measure and determine the spatial distribution of the gas temperature in the merging cluster MACS J0717.5+3745, atz= 0.55. Despite the complexity of the target object, we find a good morphological agreement between the temperature maps derived from X-ray spectroscopy only – usingXMM-Newton(TXMM) andChandra(TCXO) – and the new gas-mass-weighted tSZ+X-ray imaging method (TSZX). We correlate the temperatures from tSZ+X-ray imaging and those from X-ray spectroscopy alone and find thatTSZXis higher thanTXMMand lower thanTCXOby ~ 10% in both cases. Our results are limited by uncertainties in the geometry of the cluster gas, contamination from kinetic SZ (~10%), and the absolute calibration of the tSZ map (7%). Investigation using a larger sample of clusters would help minimise these effects.
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影响因子:
6.5
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影响因子:
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DOI:
--
发表时间:
1982
期刊:
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通讯作者:
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DOI:
--
发表时间:
2016
期刊:
影响因子:
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作者:
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