Zobrazeno 1 - 10
of 1 970
pro vyhledávání: '"P. MELCHIORRI"'
We propose a revised formulation of General Relativity for cosmological contexts, in which the Einstein constant varies with the energy density of the Universe. We demonstrate that this modification has no direct phenomenological impact on the Univer
Externí odkaz:
http://arxiv.org/abs/2412.14747
The Hubble tension, a significant discrepancy between the Hubble constant ($H_0$) values derived from early-time (Cosmic Microwave Background and Baryon Acoustic Oscillations) and late-time (Cepheid-calibrated Type Ia Supernovae) measurements, remain
Externí odkaz:
http://arxiv.org/abs/2408.03875
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
We study the possibility of measuring the optical depth at reionization, $\tau$, without relying on large-scale Cosmic Microwave Background (CMB) polarization. Our analysis is driven by the need to obtain competitive measurements that can validate th
Externí odkaz:
http://arxiv.org/abs/2312.06482
The search for non-Gaussian signatures in the Cosmic Microwave Background (CMB) is crucial for understanding the physics of the early Universe. Given the possibility of non-Gaussian fluctuations in the CMB, a recent revision to the standard $\Lambda$
Externí odkaz:
http://arxiv.org/abs/2311.04038
In everyday life, we often find that we can maintain an object's equilibrium on a tray by adjusting its orientation. Building upon this observation and extending the method we previously proposed to suppress sloshing in a moving vessel, this paper pr
Externí odkaz:
http://arxiv.org/abs/2306.14212
Publikováno v:
JCAP10(2023)012
The recent observations from the James Webb Space Telescope have led to a surprising discovery of a significant density of massive galaxies with masses of $M \ge 10^{10.5} M_{\odot}$ at redshifts of approximately $z\sim 10$. This corresponds to a ste
Externí odkaz:
http://arxiv.org/abs/2306.07781
Inflationary Potential as seen from Different Angles: Model Compatibility from Multiple CMB Missions
Autor:
Giarè, William, Pan, Supriya, Di Valentino, Eleonora, Yang, Weiqiang, de Haro, Jaume, Melchiorri, Alessandro
Publikováno v:
JCAP 09 (2023) 019
The cosmic microwave background (CMB) temperature and polarization anisotropies, as observed by independent astronomical missions such as WMAP, Planck, and most recently the Atacama Cosmology Telescope and the South Pole Telescope have played a vital
Externí odkaz:
http://arxiv.org/abs/2305.15378
Publikováno v:
Phys. Rev. D 108, 063505 (2023)
We provide an Emergent Universe picture in which the fine-tuning on the initial conditions is replaced by cut-off physics, implemented on a semiclassical level when referred to the Universe dynamics and on a purely quantum level for the quantum fluct
Externí odkaz:
http://arxiv.org/abs/2302.01173
Autor:
Martino Pesaresi, Marcello Schiavina, Panagiotis Politis, Sergio Freire, Katarzyna Krasnodębska, Johannes H. Uhl, Alessandra Carioli, Christina Corbane, Lewis Dijkstra, Pietro Florio, Hannah K. Friedrich, Jing Gao, Stefan Leyk, Linlin Lu, Luca Maffenini, Ines Mari-Rivero, Michele Melchiorri, Vasileios Syrris, Jamon Van Den Hoek, Thomas Kemper
Publikováno v:
International Journal of Digital Earth, Vol 17, Iss 1 (2024)
The Global Human Settlement Layer (GHSL) project fosters an enhanced, public understanding of the human presence on Earth. A decade after its inception in the Digital Earth 2020 vision, GHSL is an established project of the European Commission’s Jo
Externí odkaz:
https://doaj.org/article/5eada1a535274db6a93a898ca8865701
