Abstract
Studies of surface brightness fluctuations in the intracluster medium present an indirect probe of turbulent properties such as the turbulent velocities, injection scales, and the slope of the power spectrum of fluctuations toward smaller scales. With the advancement of Sunyaev-Zel’dovich (SZ) studies and surveys relative to X-ray observations, we seek to investigate surface brightness fluctuations in a sample of South Pole Telescope (SPT)-SZ clusters which also have archival XMM-Newton data. Here we present a pilot study of two typical clusters in that sample: SPT-CLJ0232-4421 and SPT-CLJ0638-5358. We infer injection scales larger than 500 kpc in both clusters and Mach numbers ≈ 0.5 in SPT-CLJ0232-4421 and Mach numbers ≈ 0.6-1.6 in SPT-CLJ0638-5358, which has a known shock. We find hydrostatic bias values for M 500 less than 0.2 for SPT-CLJ0232-4421 and less than 0.1 for SPT-CLJ0638-5358. These results show the importance to assess quantitative values via a detailed multiwavelength approach and suggest that the drivers of turbulence may occur at quite large scales.
| Original language | English |
|---|---|
| Article number | 73 |
| Journal | Astrophysical Journal |
| Volume | 970 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 1 2024 |
Bibliographical note
Publisher Copyright:© 2024. The Author(s). Published by the American Astronomical Society.
Funding
The authors would like to thank the anonymous referee for comments which have improved this work. C.R. supported by NASA ADAP grant 80NSSC19K0574 and Chandra grant G08-19117X. E.B. acknowledges financial support from the European Research Council (ERC) Consolidator grant under the European Unions Horizon 2020 research and innovation program (grant agreement CoG DarkQuest No. 101002585). M.G. acknowledges partial support by HST GO-15890.020/023-A, the BlackHoleWeather program, and NASA HEC Pleiades (SMD-1726). R.K. acknowledges support from the Smithsonian Institution, the Chandra High Resolution Camera Project through NASA contract NAS8-03060, and NASA Grants 80NSSC19K0116, GO1-22132X, and GO9-20109X. P.N. was supported by NASA contract NAS8-03060. The South Pole Telescope program is supported by the National Science Foundation (NSF) through award OPP-1852617. Partial support is also provided by the Kavli Institute of Cosmological Physics at the University of Chicago. Work at Argonne National Lab is supported by UChicago Argonne LLC, Operator of Argonne National Laboratory (Argonne). Argonne, a U.S. Department of Energy Office of Science Laboratory, is operated under contract No. DE-AC02-06CH11357.
| Funders | Funder number |
|---|---|
| The University of Chicago | |
| Operator of Argonne National Laboratory | |
| Smithsonian Institution | |
| UChicago Argonne LLC | |
| H2020 European Research Council | |
| Chandra High Resolution Camera Project | GO1-22132X, NAS8-03060, GO9-20109X, 80NSSC19K0116 |
| National Aeronautics and Space Administration | G08-19117X, 80NSSC19K0574 |
| HST/STScI | SMD-1726, GO-15890.020/023-A |
| U.S. Department of Energy EPSCoR | DE-AC02-06CH11357 |
| National Science Foundation Arctic Social Science Program | OPP-1852617 |
| Horizon 2020 | 101002585 |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science