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Title: Cosmology and astrophysics from relaxed galaxy clusters - IV: Robustly calibrating hydrostatic masses with weak lensing

Journal Article · · Monthly Notices of the Royal Astronomical Society
DOI:https://doi.org/10.1093/mnras/stw005· OSTI ID:1257733
 [1];  [2];  [3];  [4];  [3];  [5];  [6];  [7];  [8];  [9];  [10]
  1. Argelander-Institut fur Astronomie, Bonn (Germany)
  2. Univ. of Chicago, Chicago, IL (United States); Stanford Univ., Stanford, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Stanford Univ., Stanford, CA (United States); Niels Bohr Institute, Univ. of Copenhagen Julian Maries Vej, Copenhagen (Denmark)
  5. Exzellenzcluster Universe, Garching (Germany); Ludwig-Maximilians-Univ., Univ.-Sternwarte, Munchen (Germany)
  6. Univ. of California, Berkeley, CA (United States)
  7. Stanford Univ., Stanford, CA (United States)
  8. Institute of Astronomy, Honolulu, HI (United States)
  9. Niels Bohr Institute, Univ. of Copenhagen Julian Maries Vej, Copenhagen (Denmark)
  10. Astronomisches Rechen-Institut, Zentrum fur Astronomie der Univ. Heidelberg, Heidelberg (Germany)
+ Show Author Affiliations

This is the fourth in a series of papers studying the astrophysics and cosmology of massive, dynamically relaxed galaxy clusters. Here, we use measurements of weak gravitational lensing from the Weighing the Giants project to calibrate Chandra X-ray measurements of total mass that rely on the assumption of hydrostatic equilibrium. This comparison of X-ray and lensing masses measures the combined bias of X-ray hydrostatic masses from both astrophysical and instrumental sources. While we cannot disentangle the two sources of bias, only the combined bias is relevant for calibrating cosmological measurements using relaxed clusters. Assuming a fixed cosmology, and within a characteristic radius (r2500) determined from the X-ray data, we measure a lensing to X-ray mass ratio of 0.96 ± 9% (stat) ± 9% (sys). We find no significant trends of this ratio with mass, redshift or the morphological indicators used to select the sample. Our results imply that any departures from hydrostatic equilibrium at these radii are offset by calibration errors of comparable magnitude, with large departures of tens-of-percent unlikely. In addition, we find a mean concentration of the sample measured from lensing data of c200 = 3.0+4.4–1.8. In conclusion, anticipated short-term improvements in lensing systematics, and a modest expansion of the relaxed lensing sample, can easily increase the measurement precision by 30–50%, leading to similar improvements in cosmological constraints that employ X-ray hydrostatic mass estimates, such as on Ωm from the cluster gas mass fraction.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1257733
Report Number(s):
SLAC-PUB-16565
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 457, Issue 2; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 67 works
Citation information provided by
Web of Science

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Cited By (24)

The Galaxy Cluster Mass Scale and Its Impact on Cosmological Constraints from the Cluster Population journal February 2019
Comparison of hydrostatic and dynamical masses of distant X-ray luminous galaxy clusters journal October 2017
Constraints from thermal Sunyaev-Zel’dovich cluster counts and power spectrum combined with CMB journal June 2018
The XXL Survey: XXIV. The final detection pipeline journal November 2018
Chandra measurements of a complete sample of X-ray luminous galaxy clusters: the luminosity–mass relation journal October 2016
On the shape of dark matter haloes from MultiDark Planck simulations journal February 2017
The FABLE simulations: a feedback model for galaxies, groups, and clusters journal July 2018
Sunyaev–Zel’dovich effect and X-ray scaling relations from weak lensing mass calibration of 32 South Pole Telescope selected galaxy clusters journal December 2018
The redshift evolution of X-ray and Sunyaev–Zel’dovich scaling relations in the fable simulations journal August 2019
Weak lensing reveals a tight connection between dark matter halo mass and the distribution of stellar mass in massive galaxies journal December 2019
X-Ray Morphological Analysis of the Planck ESZ Clusters journal August 2017
Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-Ray, SZ, and Lensing Data journal July 2018
Properties of the Inctracluster Medium Assuming an Einasto Dark Matter Profile journal October 2018
Using X-Ray Morphological Parameters to Strengthen Galaxy Cluster Mass Estimates via Machine Learning journal October 2019
The XXL Survey: XVII. X-ray and Sunyaev-Zel’dovich properties of the redshift 2.0 galaxy cluster XLSSC 122★★★ journal November 2018
The FABLE simulations: A feedback model for galaxies, groups and clusters text January 2019
The redshift evolution of X-ray and Sunyaev-Zel'dovich scaling relations in the FABLE simulations text January 2019
Chandra Measurements of a Complete Sample of X-ray Luminous Galaxy Clusters: The Luminosity-Mass Relation text January 2015
Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-ray, SZ, and Lensing Data text January 2016
Comparison of hydrostatic and dynamical masses of distant X-ray luminous galaxy clusters text January 2017
Constraints from thermal Sunyaev-Zeldovich cluster counts and power spectrum combined with CMB text January 2017
The FABLE simulations: A feedback model for galaxies, groups and clusters text January 2018
The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population text January 2019
The redshift evolution of X-ray and Sunyaev-Zel'dovich scaling relations in the FABLE simulations text January 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
gravitational lensing: weak
galaxies: clusters: general
cosmology: observations
X-rays: galaxies: clusters