Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32162
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Corasaniti, Pier-Stefano | en_US |
dc.contributor.author | Sereno, Mauro | en_US |
dc.contributor.author | ETTORI, STEFANO | en_US |
dc.date.accessioned | 2022-06-01T14:35:01Z | - |
dc.date.available | 2022-06-01T14:35:01Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32162 | - |
dc.description.abstract | In recent years, the availability of large, complete cluster samples has enabled numerous cosmological parameter inference analyses using cluster number counts. These have provided constraints on the cosmic matter density Ω<SUB>m</SUB> and the amplitude of matter density fluctuations σ<SUB>8</SUB> alternative to that obtained from other standard probes. However, systematics uncertainties, such as the mass calibration bias and selection effects, may still significantly affect these data analyses. Hence, it is timely to explore other proxies of galaxy cluster cosmology that can provide cosmological constraints complementary to those obtained from cluster number counts. Here we use measurements of the cluster sparsity from weak-lensing mass estimates of the LC<SUP>2</SUP>-single and HSC-XXL cluster catalogs to infer constraints on a flat ΛCDM model. The cluster sparsity has the advantage of being insensitive to selection and mass calibration bias. On the other hand, it primarily constrains a degenerate combination of Ω<SUB>m</SUB> and σ<SUB>8</SUB> (along approximately constant curves of ${S}_{8}={\sigma }_{8}\sqrt{{{\rm{\Omega }}}_{m}/0.3}$ and, to a lesser extent, the reduced Hubble parameter h. Hence, in order to break the internal parameter degeneracies, we perform a combined likelihood analysis of the cluster sparsity estimates with cluster gas mass fraction measurements and BAO data. We find marginal constraints that are competitive with those from other standard cosmic probes: Ω<SUB>m</SUB> = 0.316 ± 0.013, σ<SUB>8</SUB> = 0.757 ± 0.067 (corresponding to S<SUB>8</SUB> = 0.776 ± 0.064), and h = 0.696 ± 0.017 at 1σ. Moreover, assuming a conservative Gaussian prior on the mass bias of gas mass fraction data, we find a lower limit on the gas depletion factor Y<SUB>b,500c</SUB> ≳ 0.89. | en_US |
dc.language.iso | eng | en_US |
dc.title | Cosmological Constraints from Galaxy Cluster Sparsity, Cluster Gas Mass Fraction, and Baryon Acoustic Oscillation Data | en_US |
dc.identifier.doi | 10.3847/1538-4357/abe9a4 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/abe9a4 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 911 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 82 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.identifier.adsbibcode | 2021ApJ...911...82C | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_12 Dark matter, dark energy | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0003-0302-0325 | - |
crisitem.author.orcid | 0000-0003-4117-8617 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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Cosmological Constraints_2021_ApJ_911_82.pdf | PDF editoriale | 5.82 MB | Adobe PDF | View/Open |
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