299 citations · 1.5k across the 70 of their papers we have counts for
27 papers · 1 filter
Debiasing Local Cluster Infall Reveals : Application to the Virgo Cluster
Bastien Carreres, David Benisty, Jenny Wagner +3
Galaxy recession velocities are commonly used to measure the Hubble constant, , with peculiar velocities treated as random noise. Around massive clusters, however, these motio…
Hubble Constant and Mass Determination of Centaurus A & M83 from TRGB Distances
Adrian Faucher, David Benisty, David F. Mota
An independent determination of the Hubble constant is crucial given the persistent tension between early- and late-Universe measurements. In this study, we analyze the dynamics of…
The Binary Ballet: Mapping Local Expansion Around M81 & M82
Jenny Wagner, David Benisty, Igor D. Karachentsev
This study of the M81 complex and its Hubble flow delivers new and improved Tip of the Red Giant Branch (TRGB)-based distances for nine member galaxies, yielding a total of 58 gala…
Islands in Simulated Cosmos: Probing the Hubble Flow around Groups and Clusters
David Benisty, Antonino Del Popolo
The local Hubble flow provides a valuable probe of the transition between cosmic expansion and nonlinear gravitational dynamics. On large scales, galaxies follow the linear Hubble…
Unveiling the Coma Cluster Structure: From the Core to the Hubble Flow
David Benisty, Jenny Wagner, Sandeep Haridasu +1
The Coma cluster, embedded in a cosmic filament, is a complex and dynamically active structure in the local Universe. Applying a density-based member selection dbscan to data from…
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.…
Bounding the Cosmological Constant using Galactic Rotation Curves from the SPARC Dataset
David Benisty, David Vasak, Jürgen Struckmeier +1
Dark energy (and its simplest model, the Cosmological Constant or ) acts as a repulsive force that opposes gravitational attraction. Assuming galaxies maintain a steady state ov…
Late-Time constraints on Interacting Dark Energy: Analysis independent of , and
David Benisty, Supriya Pan, Denitsa Staicova +2
We investigated a possible interaction between cold dark matter and dark energy, corresponding to a well-known interacting dark energy model discussed in the literature within the…
Weighing Milky Way and Andromeda in an expanding CDM Universe: Decreasing the Local Group mass
David Benisty
The dynamics of the Local Group (LG), especially the contribution of the Milky Way (MW) and Andromeda (M31) galaxies, is sensitive to the presence of dark energy. This work analyze…
Dark Energy as a Critical Period in Binary Motion: Bounds from Multi-scale Binaries
David Benisty, Jenny Wagner, Denitsa Staicova
The two-body problem under the influence of both dark energy and post-Newtonian modifications is studied. In this unified framework, we demonstrate that dark energy plays the role…
Constraining Dark Energy from Local Group dynamics
D. Benisty, A. -C. Davis, N. W. Evans
This Letter develops a method to constrain the Cosmological Constant from binary galaxies, focusing on the Milky Way and Andromeda. We provide an analytical solution to the two…
Strengthening extended Gravity constraints with combined systems: bounds from Cosmology and the Galactic Center
D. Benisty, J. Mifsud, J. Levi Said +1
Extended gravity is widely constrained in different astrophysical and astronomical systems. Since these different systems are based on different scales it is not trivial to get a c…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
On the Robustness of the Constancy of the Supernova Absolute Magnitude: Non-parametric Reconstruction \& Bayesian approaches
David Benisty, Jurgen Mifsud, Jackson Levi Said +1
In this work, we test the robustness of the constancy of the Supernova absolute magnitude using Non-parametric Reconstruction Techniques (NRT). We isolate the luminosity dist…
The dark side of the torsion: Dark Energy from propagating torsion
David Benisty, Eduardo I. Guendelman, Armin van de Venn +3
An extension to the Einstein-Cartan (EC) action is discussed in terms of cosmological solutions. The torsion incorporated in the EC Lagrangian is assumed to be totally anti-symmetr…
Dark energy interactions near the galactic centre
David Benisty, Anne-Christine Davis
We investigate scalar-tensor theories, motivated by dark energy models, in the strong gravity regime around the black hole at the centre of our galaxy. In such theories general rel…
Constraining the dark energy models using Baryon Acoustic Oscillations: An approach independent of
Denitsa Staicova, David Benisty
The tension and the accompanying tension are a hot topic in current cosmology. In order to remove the degeneracy between the Hubble parameter and the sound horizo…
Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology
David Benisty
A model of unified dark matter and dark energy based on a Dynamical Spacetime Theory (DST) is studied. By introducing a Dynamical Spacetime vector field , a conservation of an…
attractors in Quintessential Inflation motivated by Supergravity
Llibert Aresté Saló, David Benisty, Eduardo I. Guendelman +1
An exponential kind of quintessential inflation potential motivated by supergravity is studied. This type belongs to the class of α-attractor models. The model was studied for the…
Quintessential inflation and cosmological seesaw Mechanism: reheating and observational constraints
Llibert Aresté Saló, David Benisty, Eduardo I. Guendelman +1
Recently a new kind of quintessential inflation coming from the Lorentzian distribution has been introduced in [1,2]. The model leads to a very simple potential, which basically de…
Testing Late Time Cosmic Acceleration with uncorrelated Baryon Acoustic Oscillations dataset
David Benisty, Denitsa Staicova
Baryon Acoustic Oscillations (BAO) involve measuring the spatial distribution of galaxies to determine the growth rate of cosmic structure. We derive constraints on cosmological pa…
The Local Group as a test system for Modified Newtonian Dynamics
David Benisty, Eduardo I. Guendelman
The Local Group (LG) is {an appropriate} test system for Modified Newtonian Dynamics, since the acceleration of M31 galaxy is fully in the deep MOND regime . We model th…
Quintessential Inflation from Lorentzian Slow Roll
David Benisty, Eduardo I. Guendelman
From the assumption that the slow roll parameter has a Lorentzian form as a function of the e-folds number , a successful model of a quintessential inflation is obtained, as…
Lorentzian Quintessential Inflation
David Benisty, Eduardo I. Guendelman
From the assumption that the slow roll parameter has a Lorentzian form as a function of the e-folds number , a successful model of a quintessential inflation is obtained. Th…