299 citations · 1.1k across the 25 of their papers we have counts for
27 papers
Geometrical and Optical Design of the GUEST Laser-Ranged Test Masses for the Detection of Gravitational Waves in the Hz range
Dario Vetrano, Giada Bargiacchi, Nicolò Burzillà +5
The GUEST (Gravitational Universe Exploration with Satellite Tracking) mission aims at detecting gravitational waves in the yet almost unexplored Hz frequency range through high…
GUEST: Gravitational Universe Exploration with Satellite Tracking. A passive satellite laser-ranging mission for the dark gravitational Universe
Diego Blas, Aurélien Hees, F. Javier Atapuerca +78
GUEST is a space mission concept whose central objective is the detection of gravitational waves (GWs) in the microhertz band -- a physics-rich frequency window that no other prese…
NovaMoon: A Strategic Lunar Reference Station for Positioning, Timing, and Largely Enhanced Science in the Earth-Moon System
Serena Molli, Agnès Fienga, Pascale Defraigne +82
The renewed interest in lunar exploration and the development of future lunar communication and navigation services highlight the need for a precise, stable, and interoperable geod…
Cosmological and lunar laser ranging constraints on evolving dark energy in a nonminimally coupled curvature-matter gravity model
Riccardo March, Miguel Barroso Varela, Orfeu Bertolami +3
We analyze a cosmological solution to the field equations of a modified gravity model where curvature and matter are nonminimally coupled. The current Universe's accelerated expans…
Quasar cosmology II: joint analyses with Cosmic Microwave Background
M. Benetti, G. Bargiacchi, G. Risaliti +3
Currently, the increasing availability of accurate cosmological probes leads to the emergence of tensions between data on the one hand and between theoretical predictions and direc…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
High-redshift Cosmology by Gamma-Ray Bursts: an overview
Giada Bargiacchi, Maria Giovanna Dainotti, Salvatore Capozziello
Several correlations among Gamma-Ray Bursts (GRBs) quantities, both in the prompt and afterglow emissions, have been established during the last decades, thus enabling the standard…
Quasars as standard candles VI: spectroscopic validation of the cosmological sample
Bartolomeo Trefoloni, Elisabeta Lusso, Emanuele Nardini +5
A sample of quasars has been recently assembled to investigate the non-linear relation between their monochromatic luminosities at 2500Å, and 2 keV and to exploit quasars as a new…
The Scavenger Hunt for Quasar Samples to Be Used as Cosmological Tools
Maria Giovanna Dainotti, Giada Bargiacchi, Aleksander Łukasz Lenart +1
Although the Cold Dark Matter model is the most accredited cosmological model, information at high redshifts () between type Ia supernovae () and the Cosmic Microwav…
Quasars as Standard Candles V. Evaluation of a 0.06 dex intrinsic dispersion in the LX-LUV relation
Matilde Signorini, Guido Risaliti, Elisabeta Lusso +4
A characteristic feature of quasars is the observed non-linear relationship between their monochromatic luminosities at rest-frame 2500 Å and 2 keV. This relationship is evident ac…
Tensions with the flat CDM model from high-redshift cosmography
G. Bargiacchi, M. G. Dainotti, S. Capozziello
The longstanding search for the cosmological model that best describes the Universe has been made more intriguing since the recent discovery of the Hubble constant, , tensio…
Quasars as Standard Candles IV. Analysis of the X-ray and UV indicators of the disc-corona relation
Matilde Signorini, Guido Risaliti, Elisabeta Lusso +4
Context: A non-linear relation between quasar monochromatic luminosities at 2500A and 2 keV holds at all observed redshifts and luminosities, and it has been used to derive quasar…
Quasars: standard candles up to z=7.5 with the precision of Supernovae Ia
Maria Giovanna Dainotti, Giada Bargiacchi, Aleksander Łukasz Lenart +2
Currently, the Cold Dark Matter model, which relies on the existence of cold dark matter and a cosmological constant , best describes the Universe. However, we lack informat…
Reducing the uncertainty on the Hubble constant up to 35\% with an improved statistical analysis: different best-fit likelihoods for Supernovae Ia, Baryon Acoustic Oscillations, Quasars, and Gamma-Ray Bursts
Maria Giovanna Dainotti, Giada Bargiacchi, Małgorzata Bogdan +5
Cosmological models and their parameters are widely debated, especially about whether the current discrepancy between the values of the Hubble constant, , obtained by type I…
The most luminous blue quasars at 3.0<z<3.3 -- III. LBT spectra and accretion parameters
Bartolomeo Trefoloni, Elisabeta Lusso, Emanuele Nardini +13
We present the analysis of the rest frame ultraviolet and optical spectra of 30 bright blue quasars at , selected to examine the suitability of AGN as cosmological probes.…
Quasars as high-redshift standard candles
Guido Risaliti, Elisabeta Lusso, Emanuele Nardini +5
In the past few years, we built a Hubble diagram of quasars up to redshift z7, based on the nonlinear relation between quasars' x-ray and UV luminosities. Such a Hubble diagr…
Gamma-Ray Bursts, Quasars, Baryonic Acoustic Oscillations, and Supernovae Ia: new statistical insights and cosmological constraints
G. Bargiacchi, M. G. Dainotti, S. Nagataki +1
The recent Hubble constant, , tension is observed between the value of from the Cosmic Microwave Background (CMB) and Type Ia Supernovae (SNe Ia). It i…
Reduced uncertainties up to 43\% on the Hubble constant and the matter density with the SNe Ia with a new statistical analysis
Maria Giovanna Dainotti, Giada Bargiacchi, Malgorzata Bogdan +2
Type Ia Supernovae (SNe Ia) are considered the most reliable \textit{standard candles} and they have played an invaluable role in cosmology since the discovery of the Universe's ac…
A bias-free cosmological analysis with quasars alleviating tension
Aleksander Łukasz Lenart, Giada Bargiacchi, Maria Giovanna Dainotti +2
Cosmological models and their parameters are widely debated because of theoretical and observational mismatches of the standard cosmological model, especially the current discrepan…
Quasars as high-redshift standard candles
A. Sacchi, G. Risaliti, M. Signorini +10
The non-linear relation between the X-ray and ultraviolet (UV) luminosity in quasars has been used to derive quasar distances and to build a Hubble diagram at redshifts up to $z\si…
Quasar standardization: Overcoming Selection Biases and Redshift Evolution
Maria Giovanna Dainotti, Giada Bardiacchi, Aleksander Lukasz Lenart +5
Quasars (QSOs) are extremely luminous active galatic nuclei currently observed up to redshift . As such, they have the potential to be the next rung of the cosmic distance…
Optical and X-ray GRB Fundamental Planes as Cosmological Distance Indicators
Maria Giovanna Dainotti, Via Nielson, Giuseppe Sarracino +5
Gamma-Ray Bursts (GRBs), can be employed as standardized candles, extending the distance ladder beyond Supernovae Type Ia (SNe Ia, ). We standardize GRBs using the 3D funda…
Revealing Intrinsic Flat CDM Biases with Standardizable Candles
Eoin Ó Colgáin, M. M. Sheikh-Jabbari, Rance Solomon +4
Emerging high redshift cosmological probes, in particular quasars (QSOs), show a preference for larger matter densities, , within the flat CDM framework. Here,…
Quasar cosmology: dark energy evolution and spatial curvature
G. Bargiacchi, M. Benetti, S. Capozziello +3
We analyse some open debates in cosmology in light of the most updated quasar (QSO) sample, covering a wide redshift range up to , combined with type Ia supernovae (SNe)…