Constraining the neutrino mass using a multitracer combination of two galaxy surveys and cosmic microwave background lensing

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dc.contributor.authorBallardini, Mario
dc.contributor.authorMaartens, Roy
dc.date.accessioned2022-09-20T12:08:43Z
dc.date.available2022-09-20T12:08:43Z
dc.date.issued2022
dc.description.abstractMeasuring 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 = 0.1 h Mpc−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.en_US
dc.identifier.citationBallardini, M., & Maartens, R. (2022). Constraining the neutrino mass using a multitracer combination of two galaxy surveys and cosmic microwave background lensing. Monthly Notices of the Royal Astronomical Society, 510(3), 4295-4301. 10.1093/mnras/stab3480en_US
dc.identifier.issn1365-2966
dc.identifier.uri10.1093/mnras/stab3480
dc.identifier.urihttp://hdl.handle.net/10566/7932
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectNeutrinosen_US
dc.subjectCosmologyen_US
dc.subjectAstronomyen_US
dc.subjectAstrophysicsen_US
dc.subjectRadiationen_US
dc.titleConstraining the neutrino mass using a multitracer combination of two galaxy surveys and cosmic microwave background lensingen_US
dc.typeArticleen_US

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