Article
Astronomy & Astrophysics
Chunshan Lin
Summary: This study presents a general covariant local field theory of the holographic dark energy model, showing that the low energy effective theory is the massive gravity theory with a scalar graviton having strong coupling at certain energy scale. The UV-IR correspondence in this model stems from the breakdown of the effective field theory at the energy scale.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Mohammad Ali Gorji, Hayato Motohashi, Shinji Mukohyama
Summary: In the context of scalar-tensor theories, stealth de Sitter solutions face issues of infinite strong coupling or gradient instability, which can be resolved by introducing a controlled detuning mechanism known as scordatura. This mechanism not only resolves the mentioned issues, but also ensures a well-defined quasi-static limit.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Abdolali Banihashemi, Nima Khosravi, Arman Shafieloo
Summary: A new critically emergent dark energy model (CEDE) is proposed, which is consistent with both Planck's CMB data and Riess et al.'s local Hubble constant measurements. The model suggests that dark energy emerges at a transition redshift, providing a possible explanation for the Hubble constant tension.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alvaro de la Cruz Dombriz, Francisco Jose Maldonado Torralba, David F. Mota
Summary: The stable pseudo-scalar degree of freedom in the quadratic Poincare Gauge theory of gravity is identified as a suitable candidate for dark matter. The study determines the parameter space in the theory that can explain all predicted cold dark matter phenomena and constrains these parameters with astrophysical observations.
Article
Astronomy & Astrophysics
Andreas Lymperis
Summary: By investigating the features of a non-metricity scalar Q function, the cosmological implications of f(Q) gravity are explored, and analytical expressions for the dark energy density, equation-of-state, and deceleration parameters are obtained. The study reveals that even in the absence of a cosmological constant, the universe follows the usual thermal history with matter and dark energy eras, and the dark energy equation-of-state parameter remains in the phantom regime. Additionally, the scenario shows excellent agreement with observational data from Supernovae type Ia. Furthermore, it is demonstrated that f(Q) gravity can effectively mimic the behavior of a cosmological constant.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Antonio De Felice, Shinji Mukohyama
Summary: This paper introduces a new cosmological framework integrating dark matter into a minimally modified gravity model, maintaining the same number of gravitational degrees of freedom through a series of transformations. The framework includes two time-dependent free functions to achieve desired evolutions of Hubble expansion rate and effective gravitational constant for dark matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Mauricio Reyes, Celia Escamilla-Rivera
Summary: This work presents an improvement on Gaussian reconstruction of the Hubble parameter data and explores new constraints in the Horndeski theory of gravity. The research finds that the prior used to calibrate the Pantheon supernovae data significantly affects the reconstructions, with the best fit reconstruction calibrated using the Ho value from The Carnegie-Chicago Hubble Program.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Celia Escamilla-Rivera, Antonio Najera
Summary: The study shows that certain dark energy parametrization models are ruled out and a strong preference against the Chevallier-Polarski-Linder model. A mock GW catalogue suggests that approximately 1000 standard sirens are needed to constrain H-0 within a 1% relative error.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Yuewei Wen, Eva Nesbit, Dragan Huterer, Scott Watson
Summary: Standard cosmological data analyses can't easily determine the presence of modified gravity. This study presents a quantitative mapping showing how modified gravity models appear within standard analyses, reporting specific biases in standard-parameter spaces. The implications for measurements of mass fluctuations are also discussed.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Daniele Oriti, Xiankai Pang
Summary: The analysis of emergent cosmological dynamics in mean field hydrodynamics of quantum gravity condensates reveals accelerated expansion of the universe at both early and late times. Although it does not support a compelling inflationary scenario in the early universe, it naturally produces a phantom-like dark energy dynamics at late times, which crosses the phantom divide and avoids any Big Rip singularity, approaching a de Sitter universe asymptotically.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
Armin van de Venn, David Vasak, Johannes Kirsch, Juergen Struckmeier
Summary: The paper investigates the implications of metric compatible covariant canonical gauge theory of gravity on cosmological scales. The resulting equations of motion in a Friedmann-Lemaitre-Robertson-Walker Universe are derived for a totally anti-symmetric torsion tensor. The modifications of the Friedmann equations, equivalent to spatial curvature, are shown in the limit of a vanishing quadratic Riemann-Cartan term and are further investigated in the early and late times of the Universe's history.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Claudia de Rham, Scott Melville, Johannes Noller
Summary: Positivity bounds have been used to constrain scalar-tensor theories of dark energy, but coupling to matter fields has played a limited role. Demanding positivity when including interactions with standard matter fields leads to further constraints on the dark energy parameter space. Implementing these bounds as theoretical priors affects cosmological parameter constraints and shows that gravitational waves must travel superluminally on cosmological backgrounds in a standard UV completion.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Hooman Davoudiasl, Peter B. Denton, David A. McGady
Summary: The conventional lore excludes fermionic dark matter with mass lighter than a few hundred electronvolts based on the Pauli exclusion principle. A new method is proposed in this paper which involves numerous quasi-degenerate species of fermions without couplings to the standard model to evade this bound. Gravitational interactions impose constraints from measurements at the LHC, cosmic rays, supernovae, and black hole spins and lifetimes, with a particular limit on the number of distinct species of particles being less than or around 10^62.
Article
Astronomy & Astrophysics
Lilia Anguelova, John Dumancic, Richard Gass, L. C. R. Wijewardhana
Summary: This study presents an exact solution for the equations of motion of a two-field cosmological model, demonstrating the possibility of multi-field dark energy. The results show that even when the scalar potential maintains the rotational invariance of the field-space metric, it is still possible to have field-space trajectories that lead to accelerated space-time expansion.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Multidisciplinary
E. H. Baffou, M. J. S. Houndjo, I. G. Salako, F. K. Ahloui, A. D. Kanfon
Summary: In this paper, the Ricci dark energy model (RDE) with bulk viscosity is investigated in the context of f(R, T) gravity to explain the universe's accelerated expansion. By assuming that the cosmological evolution is governed by the RDE model with bulk viscosity, the modified Friedmann equations in flat geometry are derived from f(R, T) gravity. For a specific form of f(R, T) = R + 2AT model and a bulk viscosity coefficient of the form ξ = ξ0+ξ1H, various cosmological parameters such as the Hubble parameter, deceleration parameter, effective equation of state, statefinder, and Om diagnostic parameters are calculated. The results suggest that this model can be considered as an alternative candidate to describe dark energy.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Astronomy & Astrophysics
J. A. R. Cembranos, A. L. Maroto, H. Villarrubia-Rojo
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2019)
Article
Astronomy & Astrophysics
Miguel Aparicio Resco, Antonio L. Maroto
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2020)
Article
Astronomy & Astrophysics
Miguel Aparicio Resco, Antonio L. Maroto, Jailson S. Alcaniz, L. Raul Abramo, C. Hernandez-Monteagudo, N. Benitez, S. Carneiro, A. J. Cenarro, D. Cristobal-Hornillos, R. A. Dupke, A. Ederoclite, C. Lopez-Sanjuan, A. Marin-Franch, M. Moles, C. M. Oliveira, L. Sodre, K. Taylor, J. Varela, H. Vazquez Ramio
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Physics, Particles & Fields
Alba Quelle, Antonio L. Maroto
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Astronomy & Astrophysics
J. A. R. Cembranos, A. L. Maroto, H. Villarrubia-Rojo
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
Miguel Aparicio Resco, Antonio L. Maroto
Summary: FARO is a new public Python code that computes the Fisher matrix for galaxy survey observables, allowing for tomographic and model-independent analysis, and forecasting the sensitivity of future galaxy surveys like DESI, Euclid, J-PAS and LSST.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
S. Bonoli, A. Marin-Franch, J. Varela, H. Vazquez Ramio, L. R. Abramo, A. J. Cenarro, R. A. Dupke, J. M. Vilchez, D. Cristobal-Hornillos, R. M. Gonzalez Delgado, C. Hernandez-Monteagudo, C. Lopez-Sanjuan, D. J. Muniesa, T. Civera, A. Ederoclite, A. Hernan-Caballero, V Marra, P. O. Baqui, A. Cortesi, E. S. Cypriano, S. Daflon, A. L. de Amorim, L. A. Diaz-Garcia, J. M. Diego, G. Martinez-Solaeche, E. Perez, V. M. Placco, F. Prada, C. Queiroz, J. Alcaniz, A. Alvarez-Candal, J. Cepa, A. L. Maroto, F. Roig, B. B. Siffert, K. Taylor, N. Benitez, M. Moles, L. Sodre Jr, S. Carneiro, C. Mendes de Oliveira, E. Abdalla, R. E. Angulo, M. Aparicio Resco, A. Balaguera-Antolinez, F. J. Ballesteros, D. Brito-Silva, T. Broadhurst, E. R. Carrasco, T. Castro, R. Cid Fernandes, P. Coelho, R. B. de Melo, L. Doubrawa, A. Fernandez-Soto, F. Ferrari, A. Finoguenov, R. Garcia-Benito, J. Iglesias-Paramo, Y. Jimenez-Teja, F. S. Kitaura, J. Laur, P. A. A. Lopes, G. Lucatelli, V. J. Martinez, M. Maturi, M. Quartin, C. Pigozzo, J. E. Rodriguez-Martin, V Salzano, A. Tamm, E. Tempel, K. Umetsu, L. Valdivielso, R. von Marttens, A. Zitrin, M. C. Diaz-Martin, G. Lopez-Alegre, A. Lopez-Sainz, A. Yanes-Diaz, F. Rueda-Teruel, S. Rueda-Teruel, J. Abril Ibanez, J. L. Anton Bravo, R. Bello Ferrer, S. Bielsa, J. M. Casino, J. Castillo, S. Chueca, L. Cuesta, J. Garzaran Calderaro, R. Iglesias-Marzoa, C. Iniguez, J. L. Lamadrid Gutierrez, F. Lopez-Martinez, D. Lozano-Perez, N. Maicas Sacristan, E. L. Molina-Ibanez, A. Moreno-Signes, S. Rodriguez Llano, M. Royo Navarro, V Tilve Rua, U. Andrade, E. J. Alfaro, S. Akras, P. Arnalte-Mur, B. Ascaso, C. E. Barbosa, J. Beltran Jimenez, M. Benetti, C. A. P. Bengaly, A. Bernui, J. J. Blanco-Pillado, M. Borges Fernandes, J. N. Bregman, G. Bruzual, G. Calderone, J. M. Carvano, L. Casarini, A. L. Chies-Santos, G. Coutinho de Carvalho, P. Dimauro, S. Duarte Puertas, D. Figueruelo, J. Gonzalez-Serrano, M. A. Guerrero, S. Gurung-Lopez, D. Herranz, M. Huertas-Company, J. A. Irwin, D. Izquierdo-Villalba, A. Kanaan, C. Kehrig, C. C. Kirkpatrick, J. Lim, A. R. Lopes, R. Lopes de Oliveira, A. Marcos-Caballero, D. Martinez-Delgado, E. Martinez-Gonzalez, G. Martinez-Somonte, N. Oliveira, A. A. Orsi, R. A. Overzier, M. Penna-Lima, R. R. R. Reis, D. Spinoso, S. Tsujikawa, P. Vielva, A. Z. Vitorelli, J. Q. Xia, H. B. Yuan, A. Arroyo-Polonio, M. L. L. Dantas, C. A. Galarza, D. R. Goncalves, R. S. Goncalves, J. E. Gonzalez, A. H. Gonzalez, N. Greisel, R. G. Landim, D. Lazzaro, G. Magris, R. Monteiro-Oliveira, C. B. Pereira, M. J. Reboucas, J. M. Rodriguez-Espinosa, S. Santos da Costa, E. Telles
Summary: The J-PAS survey will scan thousands of square degrees in the northern sky using a unique set of 56 filters, with miniJPAS already demonstrating the scientific potential through a survey in the AEGIS field.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
David Figueruelo, Miguel Aparicio Resco, Florencia A. Teppa Pannia, Jose Beltran Jimenez, Dario Bettoni, Antonio L. Maroto, L. Raul Abramo, Jailson Alcaniz, Narciso Benitez, Silvia Bonoli, Saulo Carneiro, Javier Cenarro, David Cristobal-Hornillos, Renato A. Dupke, Alessandro Ederoclite, Carlos Lopez-Sanjuan, Antonio Marin-Franch, Valerio Marra, Claudia Mendes de Oliveira, Mariano Moles, Laerte Sodre, Keith Taylor, Jesus Varela, Hector Vazquez Ramio
Summary: The study examines a cosmological model with coupling between dark matter and dark energy, and finds through fitting and forecasting that a coupling is more suitable than an uncoupled scenario in cosmology, primarily driven by cluster counts.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alfredo D. Miravet, Antonio L. Maroto
Summary: We explore the use of conformal vector models in cosmology, and find that gravitational waves are suppressed at large scales. Additionally, we observe anisotropies in the tensor power spectrum, despite the isotropy of the cosmological background metric. The presence of background vector fields also leads to net polarization of gravitational waves and potential linear to circular polarization conversion.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Jose Beltran Jimenez, Dario Bettoni, Philippe Brax
Summary: We study a family of non-linear electromagnetic theories that connect Born-Infeld and ModMax at different length scales. These models are duality invariant and exhibit K-mouflage screening in the Born-Infeld regime. By analyzing static perturbations around a point-like charge, we find that the propagation speed of odd perturbations approaches zero as fast as the effective charge, which may lead to strong coupling and hinder the viability of the effective field theory. We also investigate the linear response to external fields and calculate the electric polarizability and magnetic susceptibility, showing that Born-Infeld is the only theory with zero susceptibility for even multipoles.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Antonio L. Maroto, Alfredo D. Miravet
Summary: In this study, we find that the gravitational leptogenesis mechanism can occur without requiring new axial couplings in the inflaton sector. We demonstrate that the spacetime metric itself breaks parity symmetry in the perturbed Robertson-Walker background after inflation, generating a nonvanishing Pontryagin density that leads to matter-antimatter asymmetry. We analyze the asymmetry produced in different inflationary and reheating scenarios and find that it can be locally comparable to observations in some cases, although the size of the matter-antimatter regions is usually much smaller than the present Hubble radius.
Article
Astronomy & Astrophysics
Alfredo D. Miravet, Antonio L. Maroto
Summary: The study shows that ultralight vector field dark matter can induce an anisotropic suppression of gravitational wave amplitude, especially for primordial gravity waves. Future cosmic microwave background B-mode polarization detectors may be able to detect this effect.
Article
Astronomy & Astrophysics
Jorge F. Soriano, Antonio L. Maroto
Article
Astronomy & Astrophysics
M. Cermeno, J. Carro, A. L. Maroto, M. A. Perez-Garcia
ASTROPHYSICAL JOURNAL
(2019)
Article
Astronomy & Astrophysics
Franco D. Albareti, Antonio L. Maroto, Francisco Prada