Measuring the total neutrino mass is one of the most exciting opportunities available with next-generation cosmological data sets. We study the possibility of detecting the total neutrino mass using large-scale clustering in 21 cm intensity mapping and photometric galaxy surveys, together with cosmic microwave background (CMB) information. We include the scale-dependent halo bias contribution due to the presence of massive neutrinos, and use a multitracer analysis in order to reduce cosmic variance. The multitracer combination of an SKAO-MID 21 cm intensity map with stage 4 CMB dramatically shrinks the uncertainty on total neutrino mass to σ(Mν)≃45 meV, using only linear clustering information (kmax=0.1hMpc−1) and without a prior on optical depth. When we add to the multitracer the clustering information expected from Legacy Survey of Space and Time, the forecast is σ(Mν)≃12 meV.
Constraining the neutrino mass using a multitracer combination of two galaxy surveys and cosmic microwave background lensing
Mario Ballardini
Primo
;
2022
Abstract
Measuring the total neutrino mass is one of the most exciting opportunities available with next-generation cosmological data sets. We study the possibility of detecting the total neutrino mass using large-scale clustering in 21 cm intensity mapping and photometric galaxy surveys, together with cosmic microwave background (CMB) information. We include the scale-dependent halo bias contribution due to the presence of massive neutrinos, and use a multitracer analysis in order to reduce cosmic variance. The multitracer combination of an SKAO-MID 21 cm intensity map with stage 4 CMB dramatically shrinks the uncertainty on total neutrino mass to σ(Mν)≃45 meV, using only linear clustering information (kmax=0.1hMpc−1) and without a prior on optical depth. When we add to the multitracer the clustering information expected from Legacy Survey of Space and Time, the forecast is σ(Mν)≃12 meV.File | Dimensione | Formato | |
---|---|---|---|
stab3480.pdf
solo gestori archivio
Descrizione: Full text editoriale
Tipologia:
Full text (versione editoriale)
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
839.22 kB
Formato
Adobe PDF
|
839.22 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
2109.03763.pdf
accesso aperto
Descrizione: Pre-print
Tipologia:
Pre-print
Licenza:
Creative commons
Dimensione
898.64 kB
Formato
Adobe PDF
|
898.64 kB | Adobe PDF | Visualizza/Apri |
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.