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 present a velocity dispersion-based mass calibration of the South PoleTelescope Sunyaev-Zel'dovich effect survey (SPT-SZ) galaxy cluster sample.Using a homogeneously selected sample of 100 cluster candidates from 720 deg2of the survey along with 63 velocity dispersion ($\sigma_v$) and 16 X-ray Yxmeasurements of sample clusters, we simultaneously calibrate themass-observable relation and constrain cosmological parameters. Thecalibrations using $\sigma_v$ and Yx are consistent at the $0.6\sigma$ level,with the $\sigma_v$ calibration preferring ~16% higher masses. We use the fullcluster dataset to measure $\sigma_8(\Omega_ m/0.27)^{0.3}=0.809\pm0.036$. TheSPT cluster abundance is lower than preferred by either the WMAP9 orPlanck+WMAP9 polarization (WP) data, but assuming the sum of the neutrinomasses is $\sum m_\nu=0.06$ eV, we find the datasets to be consistent at the1.0$\sigma$ level for WMAP9 and 1.5$\sigma$ for Planck+WP. Allowing for larger$\sum m_\nu$ further reconciles the results. When we combine the cluster andPlanck+WP datasets with BAO and SNIa, the preferred cluster masses are$1.9\sigma$ higher than the Yx calibration and $0.8\sigma$ higher than the$\sigma_v$ calibration. Given the scale of these shifts (~44% and ~23% in mass,respectively), we execute a goodness of fit test; it reveals no tension,indicating that the best-fit model provides an adequate description of thedata. Using the multi-probe dataset, we measure $\Omega_ m=0.299\pm0.009$ and$\sigma_8=0.829\pm0.011$. Within a $\nu$CDM model we find $\sum m_\nu =0.148\pm0.081$ eV. We present a consistency test of the cosmic growth rate.Allowing both the growth index $\gamma$ and the dark energy equation of stateparameter $w$ to vary, we find $\gamma=0.73\pm0.28$ and $w=-1.007\pm0.065$,demonstrating that the expansion and the growth histories are consistent with aLCDM model ($\gamma=0.55; \,w=-1$).

astrophysical journal/the astrophysical journal

Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster  Sample Using Velocity Dispersion $\sigma_v$ and X-ray $Y_\textrm{X}$  Measurements