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

Large samples of galaxy clusters provide knowledge of both astrophysics inthe most massive virialised environments and the properties of the cosmologicalmodel that defines our Universe. However, an important issue that affects theinterpretation of galaxy cluster samples is the role played by the selectionwaveband and the potential for this to introduce a bias in the physicalproperties of clusters thus selected. We aim to investigate waveband-dependentselection effects in the identification of galaxy clusters by comparing theX-ray Multi-Mirror (XMM) Ultimate Extra-galactic Survey (XXL) and Subaru HyperSuprime-Cam (HSC) CAMIRA cluster samples identified from a common 22.6 deg2 skyarea. We compare 150 XXL and 270 CAMIRA clusters in a common parameter spacedefined by X-ray aperture brightness and optical richness. We find that 71/150XXL clusters are matched to the location of a CAMIRA cluster, the majority ofwhich (67/71) display richness values N>15 that exceed the CAMIRA cataloguerichness threshold. We find that 67/270 CAMIRA clusters are matched to thelocation of an XXL cluster (defined within XXL as an extended X-ray source). Ofthe unmatched CAMIRA clusters, the majority display low X-ray fluxes consistentwith the lack of an XXL counterpart. However, a significant fraction (64/107)CAMIRA clusters that display high X-ray fluxes are not asociated with anextended source in the XXL catalogue. We demonstrate that this disparity arisesfrom a variety of effects including the morphological criteria employed toidentify X-ray clusters and the properties of the XMM PSF.

monthly notices of the royal astronomical society

Understanding X-ray and optical selection of galaxy clusters: A  comparison of the XXL and CAMIRA cluster catalogues obtained in the common  XXL-HSC SSP area