Article
Astronomy & Astrophysics
J. Vega-Ferrero, J. M. Dana, J. M. Diego, G. Yepes, W. Cui, M. Meneghetti
Summary: The study compares the statistics and morphology of giant arcs in galaxy clusters using different models, finding that self-interacting dark matter produces fewer but more magnified arcs. The probability of interaction is higher in colliding clusters and in denser regions.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Nicola C. Amorisco, James Nightingale, Qiuhan He, Aristeidis Amvrosiadis, Xiaoyue Cao, Shaun Cole, Amy Etherington, Carlos S. Frenk, Ran Li, Richard Massey, Andrew Robertson
Summary: This article investigates the detectability of low-mass dark matter haloes in warm dark matter models. The authors find that haloes are harder to detect when they are either behind or in front of the lens. Furthermore, the perturbing effect of haloes increases with their concentration, and accounting for the scatter in the mass-concentration relation can significantly boost the expected number of detections.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
G. Zacharegkas, C. Chang, J. Prat, S. Pandey, I Ferrero, J. Blazek, B. Jain, M. Crocce, J. DeRose, A. Palmese, S. Seitz, E. Sheldon, W. G. Hartley, R. H. Wechsler, S. Dodelson, P. Fosalba, E. Krause, Y. Park, C. Sanchez, A. Alarcon, A. Amon, K. Bechtol, M. R. Becker, G. M. Bernstein, A. Campos, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, R. Chen, A. Choi, J. Cordero, C. Davis, H. T. Diehl, C. Doux, A. Drlica-Wagner, K. Eckert, J. Elvin-Poole, S. Everett, A. Ferte, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, I Harrison, K. Herner, E. M. Huff, M. Jarvis, N. Kuropatkin, P-F Leget, N. MacCrann, J. McCullough, J. Myles, A. Navarro-Alsina, A. Porredon, M. Raveri, R. P. Rollins, A. Roodman, A. J. Ross, E. S. Rykoff, L. F. Secco, I Sevilla-Noarbe, T. Shin, M. A. Troxel, I Tutusaus, T. N. Varga, B. Yanny, B. Yin, Y. Zhang, J. Zuntz, T. M. C. Abbott, M. Aguena, S. Allam, F. Andrade-Oliveira, J. Annis, D. Bacon, E. Bertin, D. Brooks, D. L. Burke, J. Carretero, F. J. Castander, M. Costanzi, L. N. da Costa, M. E. S. Pereira, S. Desai, J. P. Dietrich, P. Doel, A. E. Evrard, B. Flaugher, J. Frieman, J. Garcia-Bellido, E. Gaztanaga, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, B. Hoyle, D. J. James, K. Kuehn, M. Lima, M. A. G. Maia, J. L. Marshall, P. Melchior, F. Menanteau, R. Miquel, J. Muir, R. L. C. Ogando, F. Paz-Chinchon, A. Pieres, E. Sanchez, S. Serrano, M. Smith, E. Suchyta, G. Tarle, D. Thomas, C. To, R. D. Wilkinson
Summary: Galaxy-galaxy lensing is an important tool for studying the connection between galaxies and dark matter haloes. This study extends the measurement and modelling of this lensing signal to highly non-linear scales, finding that galaxies typically reside in dark matter haloes of roughly constant mass. By constraining these halo properties, our understanding of galaxy evolution and cosmology can be improved.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
D. Rosselli, F. Marulli, A. Veropalumbo, A. Cimatti, L. Moscardini
Summary: By analyzing the spectroscopic galaxy and galaxy cluster samples from the Sloan Digital Sky Survey, we derived new constraints on gravity theory. We detected the gravitational redshift effect in the velocity distribution of cluster member galaxies and compared it with the predictions of three different gravity theories. Our results are consistent with general relativity and the DGP model, but marginally disagree with the predictions of the f(R) model.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Andrea Maccio, Daniel Huterer Prats, Keri L. Dixon, Tobias Buck, Stefan Waterval, Nikhil Arora, Stephane Courteau, Xi Kang
Summary: Through simulations, it has been shown that dwarf galaxies can lose up to 80% of their dark matter content and see a significant change in the dark matter-to-stellar mass ratio after interactions with central galaxies. These findings align with observations of NGC 1052-DF2 and NGC 1054-DF4.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
T. N. Varga, D. Gruen, S. Seitz, N. MacCrann, E. Sheldon, W. G. Hartley, A. Amon, A. Choi, A. Palmese, Y. Zhang, M. R. Becker, J. McCullough, E. Rozo, E. S. Rykoff, C. To, S. Grandis, G. M. Bernstein, S. Dodelson, K. Eckert, S. Everett, R. A. Gruendl, I. Harrison, K. Herner, R. P. Rollins, I. Sevilla-Noarbe, M. A. Troxel, B. Yanny, J. Zuntz, H. T. Diehl, M. Jarvis, M. Aguena, S. Allam, J. Annis, E. Bertin, S. Bhargava, D. Brooks, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Desai, J. P. Dietrich, I. Ferrero, B. Flaugher, J. Garcia-Bellido, E. Gaztanaga, D. W. Gerdes, J. Gschwend, G. Gutierrez, S. R. Hinton, K. Honscheid, T. Jeltema, K. Kuehn, N. Kuropatkin, M. A. G. Maia, M. March, P. Melchior, F. Menanteau, R. Miquel, R. Morgan, J. Myles, F. Paz-Chinchon, A. A. Plazas, A. K. Romer, E. Sanchez, V. Scarpine, M. Schubnell, S. Serrano, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, J. Weller
Summary: We have developed a novel data-driven method for generating synthetic optical observations of galaxy clusters. By measuring and modeling the photometric properties of galaxy clusters and extrapolating the galaxy populations, we can create synthetic galaxy clusters in the same format as actual survey observations. This method can be used to test systematic uncertainties in cluster mass measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Marceau Limousin, Benjamin Beauchesne, Eric Jullo
Summary: This study conducted a parametric strong-lensing analysis on three massive galaxy clusters, revealing the existence of core mass models in these clusters. By introducing a mild perturbation in the form of B-spline potentials, a good fit was obtained and core mass models were favored.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. Elvin-Poole, N. MacCrann, S. Everett, J. Prat, E. S. Rykoff, J. DeVicente, B. Yanny, K. Herner, A. Ferte, E. DiValentino, A. Choi, D. L. Burke, I. Sevilla-Noarbe, A. Alarcon, O. Alves, A. Amon, F. Andrade-Oliveira, E. Baxter, K. Bechtol, M. R. Becker, G. M. Bernstein, J. Blazek, H. Camacho, A. Campos, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, C. Chang, R. Chen, J. Cordero, M. Crocce, C. Davis, J. DeRose, H. T. Diehl, S. Dodelson, C. Doux, A. Drlica-Wagner, K. Eckert, T. F. Eifler, F. Elsner, X. Fang, P. Fosalba, O. Friedrich, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, I. Harrison, W. G. Hartley, H. Huang, E. M. Huff, D. Huterer, E. Krause, N. Kuropatkin, P. -F. Leget, P. Lemos, A. R. Liddle, J. McCullough, J. Muir, J. Myles, A. Navarro-Alsina, S. Pandey, Y. Park, A. Porredon, M. Raveri, M. Rodriguez-Monroy, R. P. Rollins, A. Roodman, R. Rosenfeld, A. J. Ross, C. Sanchez, J. Sanchez, L. F. Secco, E. Sheldon, T. Shin, M. A. Troxel, I. Tutusaus, T. N. Varga, N. Weaverdyck, R. H. Wechsler, B. Yin, Y. Zhang, J. Zuntz, M. Aguena, S. Avila, D. Bacon, E. Bertin, S. Bocquet, D. Brooks, J. Garcia-Bellido, K. Honscheid, M. Jarvis, T. S. Li, J. Mena-Fernandez, C. To, R. D. Wilkinson
Summary: We investigate the impact of magnification on galaxy clustering and galaxy-galaxy lensing in the Dark Energy Survey Year 3. Two different lens samples are used: luminous red galaxies (redMaGiC) and a sample with a redshift-dependent magnitude limit (MagLim). We account for magnification effects on galaxy selection and find that it significantly affects the MagLim sample. The cosmological constraints from the analysis are consistent with the ΛCDM and wCDM models, but there is a discrepancy in the amplitude when allowing for free magnification bias.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
T. Mistele, S. McGaugh, S. Hossenfelder
Summary: This study made rotation curve fits using the superfluid dark matter model and evaluated the relationship between the fits, stellar mass-to-light ratios, and the resemblance to MOND. The results showed that the mass-to-light ratios obtained with superfluid dark matter are generally reasonable, but they exhibit an unnatural dependence on galaxy size. Additionally, when the fits were forced to resemble MOND, there was tension between the total dark matter mass and gravitational lensing data.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Kevin E. Andrade, Jackson Fuson, Sophia Gad-Nasr, Demao Kong, Quinn Minor, M. Grant Roberts, Manoj Kaplinghat
Summary: By analysing strongly lensed images in eight galaxy clusters, researchers were able to constrain the self-interaction cross-section of dark matter particles. The results suggest that in the observed eight clusters, the self-interaction cross-section over mass is less than 0.13 cm2 g-1 at the 95% confidence level.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Aldo Ianni, Massimo Mannarelli, Nicola Rossi
Summary: Modern cosmology can explain the origin and evolution of the universe on a large scale, but it cannot fully answer questions about the nature of the fundamental objects it describes. This study takes a different perspective by examining the mass-radius distribution of structures in the universe and its relationship with the fundamental forces. The observed structures cluster in specific regions of the mass-radius diagram associated with known particles, except for very large structures that seem to be linked to an unknown particle in the sub-eV mass range. This study proposes that this new particle is a self-interacting dark matter candidate.
RESULTS IN PHYSICS
(2022)
Article
Astronomy & Astrophysics
K. Boshkayev, T. Konysbayev, E. Kurmanov, O. Luongo, D. Malafarina, K. Mutalipova, G. Zhumakhanova
Summary: The researchers consider the possibility of the Milky Way's dark matter halo having a non-zero equation of state and evaluate the contributions from the speed of sound produced by the dark matter behaving like a fluid with pressure. Different profiles, including exponential sphere, Einasto, Burkert, and Isothermal, were compared to model the distribution of dark matter in the galactic core. They also investigated the expected experimental signature of gravitational lensing due to the presence of dark matter in the core, showing that current observations cannot distinguish certain scenarios.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Richard E. Griffiths, Mitchell Rudisel, Jenny Wagner, Timothy Hamilton, Po-Chieh Huang, Carolin Villforth
Summary: We reported the discovery of a 'folded' gravitationally lensed image, 'Hamilton's Object', found near an active galactic nucleus, which showed unique surface brightness features and stretched properties. The lensed images are sourced by a galaxy at a spectroscopic redshift and form a fold configuration on a caustic caused by a foreground galaxy cluster. The analysis suggests a mass density that hardly varies on an arcsecond scale over the areas covered by the multiple images.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Carlos R. Melo-Carneiro, Cristina Furlanetto, Ana L. Chies-Santos
Summary: In this work, the eta PPN parameter of the SDP.81 lens galaxy is investigated using mass measurements from gravitational lensing and galactic dynamics. The result shows that eta(PPN) = 1.13(+0.03)(-0.03)+/- 0.20(sys), which is consistent with the predictions of General Relativity. Better spectroscopy data are required to reduce the systematic uncertainties and improve the accuracy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Edward Belbruno, James Green
Summary: The gravitational force caused by the estimated virial mass of the Milky Way galaxy, which consists mainly of dark matter, has been analyzed using two analytical models. The force's impact on spacecraft trajectories at a sufficient distance from the Sun has been estimated and the difficulty of detecting this force has been studied. Its implications for spacecraft missions, planetary astronomy, and astrophysics are discussed.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Physics, Multidisciplinary
S. Ghaffari, Giuseppe Gaetano Luciano, S. Capozziello
Summary: We constructed a holographic model for dark energy in the Brans-Dicke cosmology by incorporating the Barrow entropy. The Hubble horizon was used as the IR cutoff to explore the cosmological consequences. We found that both the non-interacting and interacting cases can explain the current accelerated expansion of the universe, unlike the standard holographic dark energy model. Stability analysis showed that the non-interacting model was unstable, while the sign-changeable interacting model was stable only for certain parameter values. The linear interacting model always predicted a stable universe. The consistency of the model with cosmological observations was discussed.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Multidisciplinary Sciences
Bruno Piccirillo, Domenico Paparo, Andrea Rubano, Antonello Andreone, Marcello Rossetti Conti, Dario Giove, Veronica Vicuna-Hernandez, Can Koral, Maria Rosaria Masullo, Giovanni Mettivier, Michele Opromolla, Gianpaolo Papari, Andrea Passarelli, Giuseppe Pesce, Vittoria Petrillo, Ester Piedipalumbo, Marcel Ruijter, Paolo Russo, Luca Serafini
Summary: In this work, a liquid crystal-based modular and extendable platform is proposed for studying materials by analyzing polarization and wavefront of light. This platform will be driven by the future THz-FEL source TerRa@BriXSinO, which produces high power radiation in the THz-range. Liquid crystal-based geometric phase components have been fabricated to optimize the source's potential for accurately determining polarization- and wavefront-sensitive properties of materials. This platform allows characterizing various properties of materials and can add orbital angular momentum for investigating chiral agents' properties using nonlinear optics techniques.
Article
Physics, Mathematical
Salvatore Capozziello, Maurizio Capriolo, Gaetano Lambiase
Summary: The issue of defining gravitational energy in a given spatial region is still unresolved in General Relativity, except for particular cases of localized objects. In this study, we generalize the Einstein gravitational energy-momentum pseudotensor to non-local theories of gravity and consider analytic functions of the non-local integral operator ?(-1). By applying the Noether theorem to a gravitational Lagrangian invariant under infinitesimal rigid translations, we define a gravitational energy-momentum pseudotensor that transforms like a tensor under affine transformations. This pseudotensor, along with the energy-momentum complex, can be derived using the continuity equations considering gravitational and matter components, and their weak field limit is performed for astrophysical applications.
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Capozziello, S. Zare, D. F. Mota, H. Hassanabadi
Summary: In this study, the effects of a dark matter spike near the supermassive black hole in M87 (Virgo A galaxy) were investigated using the Bumblebee Gravity theory. The aim was to determine the impact of spontaneous Lorentz symmetry breaking on the horizon, ergo-region, and shadow of the Kerr Bumblebee black hole in the spike region. Dark matter distribution was incorporated into a Lorentz-violating spherically symmetric space-time, and the resulting solution was generalized to a Kerr Bumblebee black hole. The shapes of the shadow were examined based on observational data for the dark matter spike density and radius.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Salvatore Capozziello, Maria Caruana, Jackson Levi Said, Joseph Sultana
Summary: Teleparallel geometry provides a theoretical framework where gravitational interaction is mediated by torsion rather than curvature. Teleparallel analogue of Horndeski gravity is an approach within this framework considering scalar-tensor theories. It is a more general formalism than the standard metric one, allowing for a wider range of teleparallel Horndeski gravity models. The article explores constraints on these models in terms of ghost and Laplacian instabilities and finds that a large class of models is physically viable.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Editorial Material
Physics, Multidisciplinary
S. Capozziello, V. G. Gurzadyan
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Multidisciplinary
Stefano Camera, Salvatore Capozziello, Lorenzo Fatibene, Andrea Orizzonte
Summary: We investigate how the cosmological equation of state can be used to scrutinize extended theories of gravity, specifically the Palatini f(R) gravity. The effective equation of state produced by a given model is studied, and the inverse problem of determining which models are compatible with a given effective equation of state is also considered. We find that power-law models are capable of transforming barotropic Equations of State into effective barotropic ones, and the form of equation of state is preserved only for f(R) = R. Additionally, quadratic and non-homogeneous effective Equations of State contain the Starobinsky model and other models.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Astronomy & Astrophysics
Marcello Miranda, Daniele Vernieri, Salvatore Capozziello, Valerio Faraoni
Summary: The physical nature of Horndeski gravity is explained as a dissipative effective fluid in a new approach. Requiring the constitutive equations of a Newtonian fluid restricts the theory to two subclasses of viable Horndeski gravity. A linear stress-energy tensor of the Horndeski effective fluid is sufficient for gravitational waves to propagate at light speed, while other Horndeski theories correspond to exotic non-Newtonian effective fluids. The two linear Horndeski classes are further studied in the framework of first-order thermodynamics of viscous fluids.
GENERAL RELATIVITY AND GRAVITATION
(2023)
Article
Multidisciplinary Sciences
Francesco Bajardi, Salvatore Capozziello, Tiziana Di Salvo, Francesca Spinnato
Summary: The Noether Symmetry Approach is a method for solving the dynamics of physical systems by selecting symmetries. It can be applied in various fields and is useful for selecting viable models and finding exact solutions.
Article
Astronomy & Astrophysics
Matteo Califano, Ivan de Martino, Daniele Vernieri, Salvatore Capozziello
Summary: We investigate four cosmological models that may solve the Hubble tension by considering different dark energy equation of state. By creating mock catalogs and extracting events associated with possible electromagnetic counterpart, we estimate the precision to which the Einstein Telescope can bound the cosmological parameters. Our results show that the uncertainty in the Hubble constant is always below 1%, potentially offering a solution to the Hubble tension. The accuracy on other cosmological parameters is comparable to current methods, except for the emergent dark energy model where the Einstein Telescope alone can significantly improve the limits.
Article
Astronomy & Astrophysics
Ester Piedipalumbo, Stefano Vignolo, Pasquale Feola, Salvatore Capozziello
Summary: In this study, we investigate the non-flat interacting quintessence cosmology within the framework of scalar-tensor gravity, where a scalar field interacts with dark matter. By employing the Noether Symmetry Approach, we obtain general exact solutions for cosmological equations and determine the scalar-field self-interaction potentials. The obtained solutions are capable of reproducing the accelerated expansion of the Universe and are consistent with various observational datasets, including the SNeIa Pantheon data, gamma ray bursts Hubble diagram, and direct measurements of the Hubble parameter.
PHYSICS OF THE DARK UNIVERSE
(2023)
Article
Physics, Particles & Fields
Vittorio De Falco, Francesco Bajardi, Rocco D'Agostino, Micol Benetti, Salvatore Capozziello
Summary: Various astrophysical methods are used to detect possible deviations from General Relativity in this work. A class of f(R) gravity models, selected by the existence of Noether symmetries, is considered. The study determines static and spherically symmetric black hole solutions that encompass small departures from the Schwarzschild geometry. The proposed strategy of using ray-tracing technique and considering the Poynting-Robertson effect proves to be robust and efficient in investigating gravity and detecting small deviations from General Relativity.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
G. G. L. Nashed, S. Capozziello
Summary: This study investigates the possible modifications of general relativity at ultraviolet and infrared scales, particularly considering the possibility of parity violation in strong gravity regime. The Chern-Simons gravity theory is used to account for the parity violation. The study shows that for certain spacetime structures, Chern-Simons gravity is equivalent to general relativity, but it is not applicable to (A)dS-Kerr/Kerr black holes. The thermodynamic quantities and geodesic equation of the black hole are also calculated.
Article
Astronomy & Astrophysics
M. G. Dainotti, A. L. Lenart, A. Chraya, G. Sarracino, S. Nagataki, N. Fraija, S. Capozziello, M. Bogdan
Summary: Currently, there is a debate about cosmological models and their corresponding parameters due to the discrepancy between H-0 obtained from SNe Ia and the Planck data. Considering high redshift probes like gamma-ray bursts (GRBs) is necessary but challenging due to the large range of GRB luminosities. In this study, we use the 3D Dainotti fundamental plane relation to infer cosmological parameters, and by considering selection and evolutionary effects, we obtain a lower intrinsic scatter compared to previous results. Our analysis, using GRB correlations and complemented with SNe Ia and BAO measurements, confirms the parameters of the Lambda cold dark matter model but with the advantage of using probes detected up to z = 5.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Physics, Particles & Fields
Salvatore Capozziello, Rocco D'Agostino, Alessio Lapponi, Orlando Luongo
Summary: We demonstrate the existence of black hole solutions that conform to the thermodynamics of logotropic fluids, which have recently been employed to address cosmological and astrophysical issues, within the framework of the Einstein field equations with a negative cosmological constant. This is accomplished by employing the generalization of logotropic fluids known as the Anton-Schmidt equation of state. We further investigate the construction of the anti-de Sitter metric, satisfying energy conditions, and explore alternative solutions by relaxing the strong energy condition.
EUROPEAN PHYSICAL JOURNAL C
(2023)