Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
WEIGHING NEUTRINOS with COSMIC NEUTRAL HYDROGEN
Astrophysical Journal, Volume 814, No. 2, Article 146, Year 2015
Notification
URL copied to clipboard!
Description
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, ΩHi(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, Mν ≡ Σ mν. 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(Mν) ≲ 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(Mν) ≃ 0.06 eV (95% CL). © 2015. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Villaescusa-Navarro, Francisco
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Bull, Philip
Norway, Oslo
Universitetet I Oslo
Viel, Matteo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Statistics
Citations: 61
Authors: 3
Affiliations: 3
Identifiers
Doi:
10.1088/0004-637X/814/2/146
ISSN:
0004637X
Study Design
Cross Sectional Study
Study Approach
Quantitative