Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23480
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Villaescusa-Navarro, Francisco | en_US |
dc.contributor.author | BULL, PHILIP | en_US |
dc.contributor.author | VIEL, MATTEO | en_US |
dc.date.accessioned | 2020-03-23T16:40:14Z | - |
dc.date.available | 2020-03-23T16:40:14Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/23480 | - |
dc.description.abstract | We investigate the signatures left by massive neutrinos on the spatial distribution of neutral hydrogen (H i) in the post-reionization era by running hydrodynamic simulations that include massive neutrinos as additional collisionless particles. We find that halos in massive/massless neutrino cosmologies host a similar amount of neutral hydrogen, although for a fixed halo mass, on average, the H i mass increases with the sum of the neutrino masses. Our results show that H i is more strongly clustered in cosmologies with massive neutrinos, while its abundance, Ω<SUB>H i</SUB>(z), is lower. These effects arise mainly from the impact of massive neutrinos on cosmology: they suppress both the amplitude of the matter power spectrum on small scales and the abundance of dark matter halos. Modeling the H i distribution with hydrodynamic simulations at z > 3 and a simple analytic model at z < 3, we use the Fisher matrix formalism to conservatively forecast the constraints that Phase 1 of the Square Kilometre Array will place on the sum of neutrino masses, M<SUB>ν</SUB> ≡ Σ m<SUB>ν</SUB>. We find that with 10,000 hr of interferometric observations at 3 ≲ z ≲ 6 from a deep and narrow survey with SKA1-LOW, the sum of the neutrino masses can be measured with an error σ(M<SUB>ν</SUB>) ≲ 0.3 eV (95% CL). Similar constraints can be obtained with a wide and deep SKA1-MID survey at z ≲ 3, using the single-dish mode. By combining data from MID, LOW, and Planck, plus priors on cosmological parameters from a Stage IV spectroscopic galaxy survey, the sum of the neutrino masses can be determined with an error σ(M<SUB>ν</SUB>) ≃ 0.06 eV (95% CL). | en_US |
dc.language.iso | eng | en_US |
dc.title | Weighing Neutrinos with Cosmic Neutral Hydrogen | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1088/0004-637X/814/2/146 | en_US |
dc.identifier.scopus | 2-s2.0-84948769311 | en_US |
dc.identifier.isi | 000371463200015 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.1088/0004-637X/814/2/146 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 814 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 146 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | GBR | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015ApJ...814..146V | en_US |
dc.relation.fund | FP7 | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::PE2 Fundamental constituents of matter: particle, nuclear, plasma, atomic, molecular, gas, and optical plasma | 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.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. Trieste | - |
crisitem.author.orcid | 0000-0002-2642-5707 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
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Villaescusa-Navarro_2015_ApJ_814_146.pdf | PDF editoriale | 2.31 MB | Adobe PDF | Visualizza/apri |
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