Zobrazeno 1 - 10
of 532
pro vyhledávání: '"Mena, Olga"'
Despite the fact that the $\Lambda$CDM model has been highly successful over the last few decades in providing an accurate fit to a broad range of cosmological and astrophysical observations, different intriguing tensions and anomalies emerged at var
Externí odkaz:
http://arxiv.org/abs/2409.02700
Autor:
Jiang, Jun-Qian, Giarè, William, Gariazzo, Stefano, Dainotti, Maria Giovanna, Di Valentino, Eleonora, Mena, Olga, Pedrotti, Davide, da Costa, Simony Santos, Vagnozzi, Sunny
The recent DESI Baryon Acoustic Oscillation measurements have led to tight upper limits on the neutrino mass sum, potentially in tension with oscillation constraints requiring $\sum m_{\nu} \gtrsim 0.06\,{\text{eV}}$. Under the physically motivated a
Externí odkaz:
http://arxiv.org/abs/2407.18047
Low-redshift probes, such as Baryon Acoustic Oscillations (BAO) and Supernovae Ia luminosity distances, have been shown to be crucial for improving the bounds on the total neutrino mass from cosmological observations, due to their ability to break de
Externí odkaz:
http://arxiv.org/abs/2405.03368
Neutrinos are the least known particle in the Standard Model of elementary particle physics. They play a crucial role in cosmology, governing the universe's evolution and shaping the large-scale structures we observe today. In this chapter, we review
Externí odkaz:
http://arxiv.org/abs/2404.19322
We present model-marginalized limits on the six standard $\Lambda$CDM cosmological parameters ($\Omega_{\rm c} h^2$, $\Omega_{\rm b} h^2$, $\theta_{\rm MC}$, $\tau_{\rm reio}$, $n_s$ and $A_s$), as well as on selected derived quantities ($H_0$, $\Ome
Externí odkaz:
http://arxiv.org/abs/2404.11182
We explore the possibility of redshift-dependent deviations in the contribution of relativistic degrees of freedom to the radiation budget of the cosmos, conventionally parameterized by the effective number of neutrinos $N_{\rm eff}$, from the predic
Externí odkaz:
http://arxiv.org/abs/2404.01457
Autor:
Wang, Deng, Mena, Olga
The integrated Sachs-Wolfe effect (ISW) describes how CMB photons pick up a net blue or redshift when traversing the time-varying gravitational potentials between the last scattering surface and us. Deviations from its standard amplitude could hint n
Externí odkaz:
http://arxiv.org/abs/2402.18248
Autor:
Forconi, Matteo, Giarè, William, Mena, Olga, Ruchika, Di Valentino, Eleonora, Melchiorri, Alessandro, Nunes, Rafael C.
The very first light captured by the James Webb Space Telescope (JWST) revealed a population of galaxies at very high redshifts more massive than expected in the canonical $\Lambda$CDM model of structure formation. Barring, among others, a systematic
Externí odkaz:
http://arxiv.org/abs/2312.11074
Autor:
Wang, Deng, Mena, Olga
Current cosmological tensions show that it is crucial to test the predictions from the canonical $\Lambda$CDM paradigm at different cosmic times. One very appealing test of structure formation in the universe is the growth rate of structure in our un
Externí odkaz:
http://arxiv.org/abs/2311.14423
Autor:
Pompa, Federica, Mena, Olga
The next-generation water Cherenkov Hyper-Kamiokande detector will be able to detect thousands of neutrino events from a galactic Supernova explosion via Inverse Beta Decay processes followed by neutron capture on Gadolinium. This superb statistics p
Externí odkaz:
http://arxiv.org/abs/2310.05474