Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Silvio A. Bonometto"'
Autor:
Silvio A. Bonometto, Roberto Mainini
Publikováno v:
Universe, Vol 2, Iss 4, p 32 (2016)
In the early Universe, strongly interacting matter was a quark–gluon plasma. Both lattice computations and heavy ion collision experiments, however, tell us that, in the absence of chemical potentials, no plasma survives at T < ∼ 150 MeV. The cos
Externí odkaz:
https://doaj.org/article/648c59a709a24fa2bf544dee7ae86f6d
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 486:2321-2335
Large primordial Black Hole (PBH) formation is enhanced if strongly coupled scalar and spinor fields ($\Phi$ and $\psi$) are a stable cosmic component since the primeval radiative expansion (SCDEW models). In particular, we show that PBH formation is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d945dfa69b5a0a813da2e691941ed74
https://doi.org/10.1093/mnras/stz846
https://doi.org/10.1093/mnras/stz846
Autor:
Silvio A. Bonometto, Roberto Mainini
Publikováno v:
Entropy; Volume 19; Issue 8; Pages: 398
Entropy, Vol 19, Iss 8, p 398 (2017)
Entropy, Vol 19, Iss 8, p 398 (2017)
Strongly Coupled Dark Energy plus Warm dark matter (SCDEW) cosmologies admit the stationary presence of $\sim 1\, \%$ of coupled-DM and DE, since inflationary reheating. Coupled-DM fluctuations therefore grow up to non-linearity even in the early rad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58095d5642615da4f82106856d3a24c3
Autor:
Roberto Mainini, Silvio A. Bonometto
Strongly Coupled Dark Energy plus Warm dark matter (SCDEW) cosmologies are based on the finding of a conformally invariant (CI) attractor solution during the early radiative expansion, requiring then the stationary presence of $\sim 1\, \%$ of couple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f1dd12ca58df1d053d8bad8dab06e40
Autor:
Silvio A. Bonometto, L. P. L. Colombo
Anisotropy data analysis leaves a significant degeneracy between primeval spectral index (n_s) and cosmic opacity to CMB photons (\tau). Low--l polarization measures, in principle, can remove it. We perform a likelihood analysis to see how cosmic var
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13950ca41566de2a39ed249e4cf7d3ef
http://www.openaccessrepository.it/record/16258
http://www.openaccessrepository.it/record/16258
In this first paper we discuss the linear theory and the background evolution of a new class of models we dub SCDEW: Strongly Coupled DE, plus WDM. In these models, WDM dominates today's matter density; like baryons, WDM is uncoupled. Dark Energy is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::050896188ba64544ef7f4c6bebe08a09
http://arxiv.org/abs/1503.07875
http://arxiv.org/abs/1503.07875
In this second paper we present the first Nbody cosmological simulations of strongly coupled Dark Energy models (SCDEW), a class of models that alleviates theoretical issues related to the nature of dark energy. SCDEW models assume a strong coupling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87f9caac39d29363b3d357d16c3cf67a
Publikováno v:
The Astrophysical Journal. 632:691-705
Axions are likely to be the Dark Matter (DM) that cosmological data require. They arise in the Peccei Quinn solution of the strong CP problem. In a previous work we showed that their model has a simple and natural generalization which yields also Dar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72226f17055e5ac5c692362a9e32aec8
https://doi.org/10.1086/433163
https://doi.org/10.1086/433163
Autor:
Silvio A. Bonometto, R. Fabbri, Ettore Carretti, Luciano Casarini, Gianni Bernardi, Roberto Mainini, L. P. L. Colombo
Publikováno v:
Astronomy & Astrophysics. 435:413-420
Neutral hydrogen around high-z QSO and an optical depth tau ~ 0.17 can be reconciled if reionization is more complex than a single transition at z ~ 6-8. Tracing its details could shed a new light on the first sources of radiation. Here we discuss ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f70074b0b0e5820ecff5104bf0820117
https://doi.org/10.1051/0004-6361:20041761
https://doi.org/10.1051/0004-6361:20041761
Publikováno v:
The Astrophysical Journal. 599:31-37
We study properties of dark matter halos in a variety of models which include Dark Energy (DE). We consider both DE due to a scalar field self--interacting through Ratra-Peebles or SUGRA potentials, and DE with constant negative w=p��>-1. We find
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c9323f37379ef1bb70d3a2f7e235e53
https://doi.org/10.1086/379237
https://doi.org/10.1086/379237