J/A+A/674/A48ivo://CDS.VizieR/J/A+A/674/A48doi:10.26093/cds/vizier.36740048CDSWicker R.Douspis M.Salvati L.Aghanim N.2024-11-28T20:03:51Z2023-05-29T08:39:32ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersx-ray-sourcesThe gas mass fraction in galaxy clusters is a convenient probe to use in cosmological studies, as it can help derive constraints on a range of cosmological parameters. This quantity is, however, subject to various effects from the baryonic physics inside galaxy clusters, which may bias the obtained cosmological constraints. Among different aspects of the baryonic physics at work, in this paper we focus on the impact of the hydrostatic equilibrium assumption. We analyzed the hydrostatic mass bias B, constraining a possible mass and redshift evolution for this quantity and its impact on the cosmological constraints. To that end, we considered cluster observations of the Planck-ESZ sample and evaluated the gas mass fraction using X-ray counterpart observations. We show a degeneracy between the redshift dependence of the bias and cosmological parameters. In particular we find evidence at 3.8{sigma} for a redshift dependence of the bias when assuming a Planck prior on Omega_m_. On the other hand, assuming a constant mass bias would lead to the extremely large value of Omega_m_>0.860. We show, however, that our results are entirely dependent on the cluster sample under consideration. In particular, the mass and redshift trends that we find for the lowest mass-redshift and highest mass-redshift clusters of our sample are not compatible. In addition, we show that assuming self-similarity in our study can impact the results on the evolution of the bias, especially with regard to the mass evolution. Nevertheless, in all the analyses, we find a value for the amplitude of the bias that is consistent with B~0.8, as expected from hydrodynamical simulations and local measurements. However, this result is still in tension with the low value of B~0.6 derived from the combination of cosmic microwave background primary anisotropies with cluster number counts.2023A&A...674A..48Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A48CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/88 : Planck early results. VIII. ESZ sample. (Planck+, 2011)J/ApJ/892/102 : XMM X-ray data of Planck ESZ galaxy clusters (Lovisari+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/674/A48https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/674/A48http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/674/A48https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/674/A48https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/674/A48http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/674/A48GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/674/A48/fgas-esz (Planck-ESZ gas fraction sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/674/A48/fgas-esz?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/674/A48/fgas-esz?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/674/A48/fgas-esz?GETtext/xml+votable180.050000true316.0629167-41.38416670.0055555555555555566/97 207 4206 4965 5099 5701 6011 6383 6873 7242 7695 7768 9036 9168 9366 9476 9506 9593 9997 10527 10664 11080 11253 11591 11626 12072 12642 12732 13314 15192 15286 16024 16030 16486 16702 17457 18534 18566 18584 18683 18894 19009 19101 19451 19935 20507 20624 20735 20874 21073 21766 22972 23451 24579 24735 25188 25391 25451 26135 26189 26208 26302 27136 27595 28430 28448 30946 31537 31851 32379 32500 32602 32894 32960 33030 33235 33289 33586 33614 33692 33810 33894 33945 34087 34159 34174 34181 34186 34443 35147 35171 37095 37395 37406 38973 39067-39068 39443 39608 40564 41014 41081 45076 45235 45421 45506 45543 45562 45966 46237 46474 46687 46763 46855 46889 47139 47168 47225 47573 48966https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/674/A48?format=asciiX-raydefaultJ/A+A/674/A48/fgas-eszPlanck-ESZ gas fraction sampleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName in the Planck ESZ samplemeta.id;meta.maincharzRedshiftsrc.redshiftfloatMgasGas mass (1)1e+14solMassphys.massfloate_MgasLower uncertainty on gas mass (1)1e+14solMassstat.errorfloatE_MgasUpper uncertainty on gas mass (1)1e+14solMassstat.error;stat.maxfloatMtotTotal hydrostatic mass (1)1e+14solMassphys.massfloate_MtotLower uncertainty on total mass (1)1e+14solMassstat.errorfloatE_MtotUpper uncertainty on total mass (1)1e+14solMassstat.error;stat.maxfloatfgasGas fractionphys.mass;arith.ratiodoublee_fgasLower uncertainty on gas fractionstat.errordoubleE_fgasUpper uncertainty on gas fractionstat.error;stat.maxdouble_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main