Weighing neutrinos with microwave background and galaxy data

Authors
Tegmark, M Zaldarriaga, M Hamilton, AJS
Citation
M. Tegmark et al., Weighing neutrinos with microwave background and galaxy data, NUCL PH B-P, 91, 2001, pp. 387-392
Citations number
32
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
ISSN journal
09205632 → ACNP
Volume
91
Year of publication
2001
Pages
387 - 392
Database
ISI
SICI code
0920-5632(200101)91:<387:WNWMBA>2.0.ZU;2-K
Abstract
Cosmological constraints on neutrino masses are improving rapidly. We compu te the joint constraints on II cosmological parameters from the latest cosm ic microwave background and large scale structure data, and find that at 95 % confidence, the total (cold+hot) dark matter density is h(2)Omega dm = 0. 20(-.10)(+.12). AS much as 38% of this dark matter is allowed to be hot (du e to neutrinos). Indeed, the data favors a non-zero neutrino fraction, but not at a statistically significant level.