The Cosmoglobe collaboration has conducted a groundbreaking joint analysis of the Planck-LFI, WMAP, and DIRBE data. Its unified, end-to-end, Bayesian approach provides improved control over systematic errors, leading to enhanced cosmological constraints and more accurate component maps and sky models. In this talk, I will provide an overview of the Cosmoglobe approach and highlight key results...
We present a new diagnostics based on the intrinsic shape alignments of group/cluster size dark matter halos to disentangle the effect of f(R) gravity from that of massive neutrinos. Using the snapshot data from a series of the DUSTGRAIN-pathfinder N-body simulations for the Planck ΛCDM cosmology and three f(R) gravity models with massive neutrinos, we first determine the probability density...
We present a numerical proof of the concept that the void spin distributions can provide a tight constraint on $\sigma_{8}$ without without being severely deteriorated by the degeneracies of $\sigma_{8}$ with $\Omega_{\rm cdm}h^{2}$, $M_{\nu}$ and $w$. Applying the Void-Finder algorithm to AbacusSummit N-body simulations of 15 different cosmological models, we identify the voids and measure...
In this talk we will review the model of superfluid dark matter, based on the existence of sub-eV particles with repulsive self-interactions. These particles are able to generate a superfluid core in galaxies upon Bose-Einstein condensation and thermalisation. We will delve into the various phenomenological implications of the model, including the formation of vortices, the behaviour around...
Understanding the distribution of dark matter (DM) within a few kpc of the Milky Way's center is critical for interpreting and projecting indirect detection signals. Some studies use the inner DM profile directly from hydrodynamic cosmological simulations; however, differences in baryonic physics prescriptions can significantly affect the resulting DM profiles. In this talk, I will quantify...
Using Early Type Galaxies (ETGs) ages as cosmic chronometers has been recently revisited as a model independent way to determine the Hubble parameter, through the inspection of their Lick indices. We present a cosmographic analysis of the ages of SDSS Legacy ETGs, aiming at a novel continuous fit of the Hubble parameter along the redshift range of the data.
We introduce a robust stacking...
We explore the origin of the cosmological constant. One salient and intriguing property of the cosmological constant is that the associated pressure is the negative of its energy density. By analyzing the energy-momentum tensor form factors of hadrons, we find that the QCD trace anomaly balances the pressure from quarks and gluons, thereby playing a key role in hadron confinement. This...
When a luminous source is gravitationally lensed, its images arrive at different times. These time delays can be measured in lensed quasars to constrain $H_0$, offering a possible resolution to the Hubble tension. A quasar’s point-like nature, however, makes it sensitive to microlensing: deflections caused by compact objects within lensing galaxies that introduce small additional delays. If...
A plethora of various entropic forms have been presented in the literature recently starting with famous Tsallis q-entropic statistics [1]. Like the Bekenstein-Hawking (horizon) entropy, which is nonextensive due to its scaling with the area and not with the volume, they go beyond the standard extensive and additive Boltzmann-Gibbs formulation of thermodynamics. However, they fit perfectly to...
The Nature of Dark Matter is, still, a widely open question that allows for very different anwers. One option is represented by particles that do interact gravitationally (as hinted by experiments), albeit with a coupling with gravity enhanced by an underlying extra-dimensional space-time. Several options have been proposed, either within a WIMPy or FIMPy approach, with different possibility...
RELHICs (REionization-Limited H I Clouds) are a population of gas-rich, starless dark matter halos predicted by the $\Lambda$CDM model. Being in hydrostatic equilibrium with the dark matter and the UV background, their gas distribution provides a unique opportunity to directly probe the structure of dark matter halos on small scales. These systems have recently become accessible to...
Initially designed to search for neutrinoless double beta decay, the CUORE (Cryogenic Underground Observatory for Rare Events) experiment also offers a unique opportunity to explore potential dark matter signals at the keV-scale. Leveraging over 2 tonne·yr of TeO$_2$ exposure, we optimized data processing and event-selection techniques, achieving stable detector performance and effective event...
The Hubble tension denotes the discrepant values of $H_0$ obtained from direct measurements in the local Universe compared to those derived from the CMB. Observational programs often compare their data also with extensions to ΛCDM applying dynamical models of dark energy (DDE) with a time-dependent equation of state parameter w. They use the MCMC method to fit the ΛCDM extensions to their...
The evolution of the early Universe may have been driven by a hot hidden sector, made of dark matter and possibly other companion particles. Such conditions can be achieved, for instance, by asymmetric reheating from inflaton decay, and open new regions in the parameter space. In this talk, using dark QED as a benchmark model for the dark sector, I will introduce asymmetric reheating and the...
Barring a few potential exceptions, galaxy clusters (GC) are not confirmed gamma-ray sources despite theoretical expectations. We use 16 years of Fermi-LAT data to characterize the gamma-ray emission of a population of GC selected from the Planck Sunyaev-Zeldovich catalog. We employ a likelihood stacking technique to uncover the cumulative gamma-ray signal from this population. The stack of...
The CMS Precise Proton Spectrometer (PPS) has opened a new window in the gamma-gamma interactions at TeV energies. A discussion on recent results and future searches will be presented focusing on the impact of photon-DM interaction at cosmological level
The magnetic and electric dipole moments (MDM and EDM) of charm baryons remain unmeasured and offer a unique window into physics beyond the Standard Model. In particular, a nonzero EDM would signal new sources of CP violation, potentially linked to the baryon asymmetry of the universe.
The proposed ALADDIN experiment at the LHC aims to perform the first direct measurement of these moments....
Shinozaki et al. in prep. present an analytical model that embeds the cusp–core transition into the c–M relation of dark matter halos. The model accounts for deviations from scaling relations in galaxies, where central surface densities fall below c–M predictions. In contrast, UFDs retain high central densities consistent with CDM. Assuming supernova(SN) feedback drives the transition, the...
The Jiangmen Underground Neutrino Observatory (JUNO) is poised to make significant contributions to neutrino physics, including the indirect search for dark matter from the annihilation of WIMPs with masses in the GeV range, which can become gravitationally trapped within the solar core. While Pulse Shape Discrimination (PSD) is a standard technique for classifying events in JUNO , this work...
The population of dark matter subhaloes in the Milky Way provides constraints on the dark matter particle mass. Previous studies suggest that stellar streams serve as probes of dark substructure through the dynamical signatures, such as gaps, imprinted by perturbations. With the advent of the Gaia satellite, several streams running nearly parallel to each other have been discovered. In this...
We propose a new framework based on structure formation at the free-streaming scale and a modified "X miracle" beyond the standard WIMP paradigm. Both point to nonthermal, superheavy fermionic dark matter of $10^{12}$GeV. Unlike WIMPs that are light, semi-relativistic, and unaffected by gravity at freeze-out, the X miracle incorporates gravity, introducing a new fundamental scale...
