Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/131762
Implications for primordial non-Gaussianity (fNL) from weak lensing masses of high-z galaxy clusters
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
The recent weak-lensing measurement of the dark matter mass of the high-redshift galaxy cluster XMMUJ2235.3-2557 of ( 8.5 ± 1.7 ) × 10 14 M ⊙ at z = 1.4 , indicates that, if the cluster is assumed to be the result of the collapse of dark matter in a primordial Gaussian field in the standard lambda cold dark matter model, then its abundance should be < 2 × 10 − 3 clusters in the observed area. Here we investigate how to boost the probability of XMMUJ2235.3-2557, in particular, resorting to deviations from Gaussian initial conditions. We show that this abundance can be boosted by factors > 3 - 10 if the non-Gaussianity parameter f local NL is in the range 150-200. This value is comparable to the limit for f NL obtained by current constraints from the cosmic microwave background. We conclude that mass determination of high-redshift, massive clusters can offer a complementary probe of primordial non-Gaussianity.
Matèries (anglès)
Citació
Citació
JIMÉNEZ, Raúl (jiménez tellado), VERDE, Licia. Implications for primordial non-Gaussianity (fNL) from weak lensing masses of high-z galaxy clusters. _Physical Review D_. 2009. Vol. 80, núm. 12, pàgs. 127302. [consulta: 21 de gener de 2026]. ISSN: 1550-7998. [Disponible a: https://hdl.handle.net/2445/131762]