Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24037
DC Field | Value | Language |
---|---|---|
dc.contributor.author | ANDREON, Stefano | en_US |
dc.date.accessioned | 2020-04-15T12:48:16Z | - |
dc.date.available | 2020-04-15T12:48:16Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24037 | - |
dc.description.abstract | Richness, i.e., the number of bright cluster galaxies, is known to correlate with the cluster mass, however, to exploit it as mass proxy we need a way to estimate the aperture in which galaxies should be counted that minimizes the scatter between mass and richness. In this work, using a sample of 39 clusters with accurate caustic masses at 0.1 <z< 0.22, we first show that the scatter between mass and richness derived from survey data is negligibly small, as small as best mass proxies. The scatter turns out to be smaller than in some previous works and has a 90% upper limit of 0.05 dex in mass. The current sample, adjoining 76 additional clusters analyzed in previous works, establishes an almost scatterless, minimally evolving (if at all), mass-richness scaling in the redshift range 0.03 <z< 0.55. We then exploit this negligible scatter to derive the reference aperture to be used to compute richness and to predict the mass of cluster samples. These predicted masses have a total 0.16 dex scatter with caustic mass, about half of which is not intrinsic to the proxy, but related to the noisiness of the caustic masses used for test proxy performances. These results make richness-based masses of best quality and available for large samples at a low observational cost. | en_US |
dc.language.iso | eng | en_US |
dc.title | Making the observational parsimonious richness a working mass proxy | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201526081 | en_US |
dc.identifier.scopus | 2-s2.0-84945135799 | en_US |
dc.identifier.isi | 000363538500100 | en_US |
dc.identifier.url | http://arxiv.org/abs/1509.00589v1 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2015/10/aa26081-15/aa26081-15.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 582 | en_US |
dc.relation.firstpage | A100 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 1 | en_US |
dc.description.international | no | en_US |
dc.contributor.country | ITA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015A&A...582A.100A | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0002-2041-8784 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2015_improvedproxy.pdf | PDF editoriale | 239.19 kB | Adobe PDF | View/Open |
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