Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29649
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Martinet, Nicolas | en_US |
dc.contributor.author | Schneider, Peter | en_US |
dc.contributor.author | Hildebrandt, Hendrik | en_US |
dc.contributor.author | Shan, HuanYuan | en_US |
dc.contributor.author | Asgari, Marika | en_US |
dc.contributor.author | Dietrich, Jörg P. | en_US |
dc.contributor.author | Harnois-Déraps, Joachim | en_US |
dc.contributor.author | Erben, Thomas | en_US |
dc.contributor.author | GRADO, ANIELLO | en_US |
dc.contributor.author | Heymans, Catherine | en_US |
dc.contributor.author | Hoekstra, Henk | en_US |
dc.contributor.author | Klaes, Dominik | en_US |
dc.contributor.author | Kuijken, Konrad | en_US |
dc.contributor.author | MERTEN, JULIAN | en_US |
dc.contributor.author | Nakajima, Reiko | en_US |
dc.date.accessioned | 2021-01-11T15:17:09Z | - |
dc.date.available | 2021-01-11T15:17:09Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29649 | - |
dc.description.abstract | We study the statistics of peaks in a weak-lensing reconstructed mass map of the first 450 deg<SUP>2</SUP> of the Kilo Degree Survey (KiDS-450). The map is computed with aperture masses directly applied to the shear field with an NFW-like compensated filter. We compare the peak statistics in the observations with that of simulations for various cosmologies to constrain the cosmological parameter S_8 = σ _8 √{Ω _m/0.3}, which probes the (Ω<SUB>m</SUB>, σ<SUB>8</SUB>) plane perpendicularly to its main degeneracy. We estimate S<SUB>8</SUB> = 0.750 ± 0.059, using peaks in the signal-to-noise range 0 ≤ S/N ≤ 4, and accounting for various systematics, such as multiplicative shear bias, mean redshift bias, baryon feedback, intrinsic alignment, and shear-position coupling. These constraints are ∼ 25 per cent tighter than the constraints from the high significance peaks alone (3 ≤ S/N ≤ 4) which typically trace single-massive haloes. This demonstrates the gain of information from low-S/N peaks. However, we find that including S/N < 0 peaks does not add further information. Our results are in good agreement with the tomographic shear two-point correlation function measurement in KiDS-450. Combining shear peaks with non-tomographic measurements of the shear two-point correlation functions yields a ∼20 per cent improvement in the uncertainty on S<SUB>8</SUB> compared to the shear two-point correlation functions alone, highlighting the great potential of peaks as a cosmological probe. | en_US |
dc.language.iso | eng | en_US |
dc.title | KiDS-450: cosmological constraints from weak-lensing peak statistics - II: Inference from shear peaks using N-body simulations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx2793 | en_US |
dc.identifier.scopus | 2-s2.0-85040005029 | en_US |
dc.identifier.isi | 000424339500053 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article-abstract/474/1/712/4566530 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 474 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 712 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.474..712M | 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_6 Stars and stellar systems | 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.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.orcid | 0000-0002-0501-8256 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1709.07678.pdf | 2.22 MB | Adobe PDF | View/Open | |
stx2793.pdf | PDF editoriale | 4.89 MB | Adobe PDF | View/Open |
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