English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We propose a method to map the temperature distribution of the hot gas ingalaxy clusters that uses resolved images of the thermal Sunyaev-Zel'dovich(tSZ) effect in combination with X-ray data. Application to images from the NewIRAM KIDs Array (NIKA) and XMM-Newton allows us to measure and determine thespatial distribution of the gas temperature in the merging cluster MACSJ0717.5+3745, at $z=0.55$. Despite the complexity of the target object, we finda good morphological agreement between the temperature maps derived from X-rayspectroscopy only -- using XMM-Newton ($T_{\rm XMM}$) and Chandra ($T_{\rmCXO}$) -- and the new gas-mass-weighted tSZ+X-ray imaging method ($T_{\rmSZ}$). We correlate the temperatures from tSZ+X-ray imaging and those fromX-ray spectroscopy alone and find that $T_{\rm SZ}$ is higher than $T_{\rmXMM}$ and lower than $T_{\rm CXO}$ by $\sim 10\%$ in both cases. Our resultsare limited by uncertainties in the geometry of the cluster gas, contaminationfrom kinetic SZ ($\sim 10\%$), and the absolute calibration of the tSZ map($7\%$). Investigation using a larger sample of clusters would help minimisethese effects.

Mapping the hot gas temperature in galaxy clusters using X-ray and Sunyaev-Zel'dovich imaging