Article
Astronomy & Astrophysics
Damianos Iosifidis
Summary: This passage introduces the foundation and characteristics of the Perfect (Ideal) Hyperfluid, including the microscopic features and energy tensors. It also discusses the conservation laws followed by this fluid structure, as well as its cosmological application and possible forms.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Pedro D. Alvarez, Benjamin Koch, Cristobal Laporte, Felipe Canales, Angel Rincon
Summary: We investigate the statefinder parameters in a cosmological model with scale-dependent gravity. The Einstein field equations are obtained from an average effective action. Analytical expressions are derived from the dynamical system to enhance the convergence of numerical solutions. We determine the statefinder parameters for moderate redshift and compare them with well-known alternatives to the ACDM model.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Tahere Kashfi, Mahmood Roshan
Summary: In this paper, a recently proposed relativistic theory for MOND is investigated using phase space analysis. The background cosmological equations of the theory are converted to a set of first-order autonomous equations. It is shown that the theory has a viable sequence of cosmological epochs and provides a richer structure in terms of the background cosmology.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Borna Salehian, Hong-Yi Zhang, Mustafa A. Amin, David Kaiser, Mohammad Hossein Namjoo
Summary: This paper systematically derives the SP equations and relativistic corrections from the nonlinear and fully relativistic KGE equations in an expanding universe, providing insights into deviations and applicability beyond the SP system. The method presented simplifies the analysis of scalar dark matter dynamics and accurately captures deviations from the SP system towards the full KGE case, particularly in calculating the mass-radius relationship of solitons.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
R. Maluf, Juliano C. S. Neves
Summary: In this work, a bumblebee field is utilized to generate cosmological anisotropies by violating Lorentz symmetry through a nonzero vacuum expectation value. When coupled to Bianchi I geometry, the bumblebee field produces a preferred axis, contributing to cosmic anisotropies. The article concludes by attempting to place an upper limit on the bumblebee field using the quadrupole and octopole moments of the cosmic microwave background radiation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Xingang Chen, Reza Ebadi, Soubhik Kumar
Summary: This study examines features in the inflationary landscape that can inject extra energies into inflation models and produce on-shell particles with masses larger than the Hubble scale, extending the energy reach of cosmological collider physics program. The mechanisms of classical cosmological collider are studied in two categories of primordial features, including classical oscillations and sharp features in the inflation model, which can excite unsuppressed quantum modes of heavy fields leaving observational signatures in primordial non-Gaussianities.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Damianos Iosifidis, Konstantinos Pallikaris
Summary: In this work, we introduce metric-affine theories in a new way by changing the field variables. We present a set of equivalent frameworks and provide detailed identifications. The advantage of using these new frameworks is that any metric-affine theory can be treated as a Riemannian theory with additional fields. We investigate the Hilbert-Palatini action and reveal interesting symmetries under SO transformations in field space. Then, we use solvable Riemannian theories as seed models for solvable metric-affine theories, focusing on three examples. We present a black hole solution with torsion and non-metricity that becomes regular under certain tuning. Additionally, we report a de Sitter universe with expansion powered by 3-form torsion.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
I. E. C. R. Mendonca, Kamal Bora, R. F. L. Holanda, Shantanu Desai
Summary: In this study, possible cosmological signatures were searched for using galaxy cluster gas mass fraction measurements and cosmic chronometers. The results show that no significant departure from general relativity was found regardless of assumptions about cosmic curvature or a possible depletion factor evolution in cluster measurements.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Kieran Wood, Paul M. Saffin, Anastasios Avgoustidis
Summary: Expanding the clockwork mechanism to gravitational interactions allows for the generation of exponentially suppressed coupling to matter, without the need for large hierarchies or a dilaton. By constructing appropriate potentials, the theory exhibits the desired clockwork effect. Additionally, cosmological solutions within this framework are considered, revealing the existence of multiple deSitter vacua. Furthermore, the continuum limit of the theory is clarified, demonstrating its applicability to cosmological solutions in ghost free multi-gravity theories with nearest-neighbour interactions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Amara Ilyas, Mian Zhu, Yunlong Zheng, Yi-Fu Cai
Summary: This article presents an emergent universe scenario derived from DHOST cosmology. The universe transitions from an asymptotic Minkowski state in the far past to a radiation dominated period in the late stage, providing a graceful exit. Analysis shows that cosmological perturbations are stable, and the primordial scalar spectrum is discussed for achieving scale invariance.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Kieran Wood, Paul M. Saffin, Anastasios Avgoustidis
Summary: This article introduces the higher order generalisation of the clockwork mechanism for gravitational interactions and its potential application, and discusses the formation of the clockwork effect and the construction of cosmological solutions in multi-gravity theories. The study shows that the evolution of the metric in the theory is essentially equivalent to that of general relativity at the modified Planck scale, and it has the potential to address cosmological issues. Additionally, the article clarifies the properties of the theory in the continuum limit.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Wei Cheng, Yuan He, Jing-Wang Diao, Yu Pan, Jun Zeng, Jia-Wei Zhang
Summary: This paper investigates the testing of WIMP dark matter models by introducing an interaction term between dark energy and WIMP dark matter. The study reveals new insights on the evolution of parameters associated with dark matter freeze-out temperature and the magnification of dark matter relic density. The results suggest that with more precise cosmological observations, more stringent constraints can be placed on the WIMP dark matter models.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Polina Petriakova, Arkady A. Popov, Sergey G. Rubin
Summary: This paper discusses the origin of small parameters and aims to explain the Hierarchy problem. Flexible extra dimensions play a crucial role in the formation of physical parameters. The evolution of multidimensional metric starts from the Planck scale and ends with a static extra-dimensional metric and a 4-dimensional de Sitter space at high energies, leading to exponentially produced causally disconnected universes. Quantum fluctuations independently distort the metric within these universes, causing inflationary processes. Some universes asymptotically tend towards states characterized by small Hubble parameters. The explanation for the effective parameter reduction in the Higgs sector of the Standard Model lies in the presence of small-amplitude distributions of a scalar field in a fraction of these universes.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
Yunlong Zheng
Summary: Two types of mimetic gravity models with higher derivatives of the mimetic field are analyzed in the Hamiltonian formalism. The number of degrees of freedom (DOFs) is different between the two models. In the unitary gauge, the Dirac matrix becomes singular, resulting in extra constraints and reducing the number of DOFs.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Soumya Jana, Charles Dalang, Lucas Lombriser
Summary: The article investigates a method of transforming higher-dimensional actions into effective four-dimensional scalar-tensor theories, and finds a subset of Horndeski theories through the higher-dimensional Ricci scalar and a subclass of metric ansatz.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Astronomy & Astrophysics
Gianmassimo Tasinato, Alice Garoffolo, Daniele Bertacca, Sabino Matarrese
Summary: The propagation of high-frequency gravitational waves in scalar-tensor theories of gravity was analyzed to examine properties of cosmological distances inferred from GW measurements. The study found modifications in both the luminosity and angular distances for GW as compared to General Relativity, with implications for gravitational lensing and time-delays between lensed GW and photons in multimessenger events. The Etherington reciprocity law was proven valid for a perturbed universe within a scalar-tensor framework, showing that lensed GW and their lensed electromagnetic counterparts arrive simultaneously, in line with causality constraints.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Jamie Donald-McCann, Florian Beutler, Kazuya Koyama, Minas Karamanis
Summary: MATRYOSHKA is a suite of neural-network-based emulators and accompanying python package that can provide fast and accurate predictions of the non-linear galaxy power spectrum. By combining linear component emulators with a non-linear boost component emulator, it is possible to predict the real space non-linear galaxy power spectrum with high accuracy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Jinglan Zheng, Gong-Bo Zhao, Yuting Wang, Xiaoyong Mu, Ruiyang Zhao, Weibing Zhang, Shuo Yuan, David Bacon, Kazuya Koyama
Summary: A new consistency test is proposed to validate the ?CDM cosmology using baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) measurements. The test compares the predicted peak position of f sigma (8)(z) based on BAO observables with the peak position offered by RSD measurements. The test is demonstrated using simulated data from the DESI galaxy survey and is argued to complement existing methods and be less susceptible to systematics in RSD analysis.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
B. Abareshi, J. Aguilar, S. Ahlen, Shadab Alam, David M. Alexander, R. Alfarsy, L. Allen, C. Allende Prieto, O. Alves, J. Ameel, E. Armengaud, J. Asorey, Alejandro Aviles, S. Bailey, A. Balaguera-Antolinez, O. Ballester, C. Baltay, A. Bault, S. F. Beltran, B. Benavides, S. BenZvi, A. Berti, R. Besuner, Florian Beutler, D. Bianchi, C. Blake, P. Blanc, R. Blum, A. Bolton, S. Bose, D. Bramall, S. Brieden, A. Brodzeller, D. Brooks, C. Brownewell, E. Buckley-Geer, R. N. Cahn, Z. Cai, R. Canning, R. Capasso, A. Carnero Rosell, P. Carton, R. Casas, F. J. Castander, J. L. Cervantes-Cota, S. Chabanier, E. Chaussidon, C. Chuang, C. Circosta, S. Cole, A. P. Cooper, L. da Costa, M-C Cousinou, A. Cuceu, T. M. Davis, K. Dawson, R. De la Cruz-Noriega, A. de la Macorra, A. de Mattia, J. Della Costa, P. Demmer, M. Derwent, A. Dey, B. Dey, G. Dhungana, Z. Ding, C. Dobson, P. Doel, J. Donald-McCann, J. Donaldson, K. Douglass, Y. Duan, P. Dunlop, J. Edelstein, S. Eftekharzadeh, D. J. Eisenstein, M. Enriquez-Vargas, S. Escoffier, M. Evatt, P. Fagrelius, X. Fan, K. Fanning, V. A. Fawcett, S. Ferraro, J. Ereza, B. Flaugher, A. Font-Ribera, J. E. Forero-Romero, C. S. Frenk, S. Fromenteau, B. T. Gansicke, C. Garcia-Quintero, L. Garrison, E. Gaztanaga, F. Gerardi, H. Gil-Marin, S. Gontcho A. Gontcho, Alma X. Gonzalez-Morales, G. Gonzalez-de-Rivera, V Gonzalez-Perez, C. Gordon, O. Graur, D. Green, C. Grove, D. Gruen, G. Gutierrez, J. Guy, C. Hahn, S. Harris, D. Herrera, Hiram K. Herrera-Alcantar, K. Honscheid, C. Howlett, D. Huterer, V Irsic, M. Ishak, P. Jelinsky, L. Jiang, J. Jimenez, Y. P. Jing, R. Joyce, E. Jullo, S. Juneau, N. G. Karacayli, M. Karamanis, A. Karcher, T. Karim, R. Kehoe, S. Kent, D. Kirkby, T. Kisner, F. Kitaura, S. E. Koposov, A. Kovacs, A. Kremin, Alex Krolewski, B. L'Huillier, O. Lahav, A. Lambert, C. Lamman, Ting-Wen Lan, M. Landriau, S. Lane, D. Lang, J. U. Lange, J. Lasker, L. Le Guillou, A. Leauthaud, A. Le Van Suu, Michael E. Levi, T. S. Li, C. Magneville, M. Manera, Christopher J. Manser, B. Marshall, Paul Martini, W. McCollam, P. McDonald, Aaron M. Meisner, J. Mena-Fernandez, J. Meneses-Rizo, M. Mezcua, T. Miller, R. Miquel, P. Montero-Camacho, J. Moon, J. Moustakas, E. Mueller, Andrea Munoz-Gutierrez, Adam D. Myers, S. Nadathur, J. Najita, L. Napolitano, E. Neilsen, Jeffrey A. Newman, J. D. Nie, Y. Ning, G. Niz, P. Norberg, Hernan E. Noriega, T. O'Brien, A. Obuljen, N. Palanque-Delabrouille, A. Palmese, P. Zhiwei, D. Pappalardo, X. Peng, W. J. Percival, S. Perruchot, R. Pogge, C. Poppett, A. Porredon, F. Prada, J. Prochaska, R. Pucha, A. Perez-Fernandez, I Perez-Rafols, D. Rabinowitz, A. Raichoor, S. Ramirez-Solano, Cesar Ramirez-Perez, C. Ravoux, K. Reil, M. Rezaie, A. Rocher, C. Rockosi, N. A. Roe, A. Roodman, A. J. Ross, G. Rossi, R. Ruggeri, V Ruhlmann-Kleider, C. G. Sabiu, S. Safonova, K. Said, A. Saintonge, Javier Salas Catonga, L. Samushia, E. Sanchez, C. Saulder, E. Schaan, E. Schlafly, D. Schlegel, J. Schmoll, D. Scholte, M. Schubnell, A. Secroun, H. Seo, S. Serrano, Ray M. Sharples, Michael J. Sholl, Joseph Harry Silber, D. R. Silva, M. Sirk, M. Siudek, A. Smith, D. Sprayberry, R. Staten, B. Stupak, T. Tan, Gregory Tarle, Suk Sien Tie, R. Tojeiro, L. A. Urena-Lopez, F. Valdes, O. Valenzuela, M. Valluri, M. Vargas-Magana, L. Verde, M. Walther, B. Wang, M. S. Wang, B. A. Weaver, C. Weaverdyck, R. Wechsler, Michael J. Wilson, J. Yang, Y. Yu, S. Yuan, Christophe Yeche, H. Zhang, K. Zhang, Cheng Zhao, Rongpu Zhou, Zhimin Zhou, H. Zou, J. Zou, S. Zou, Y. Zu
Summary: The Dark Energy Spectroscopic Instrument (DESI) is a 5-year survey aimed at exploring the nature of dark energy through spectroscopic measurements of 40 million galaxies and quasars. It has been successfully installed and has achieved all of its performance goals.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Guilherme Brando, Bartolomeo Fiorini, Kazuya Koyama, Hans A. Winther
Summary: In this study, we compare and validate COLA simulations against existing emulators in the literature, and find that COLA method shows excellent agreement with the emulators under certain conditions. Furthermore, the implementation of massive neutrinos in COLA simulations and the ability to handle effective field theory of dark energy and modified gravity models are validated through experiments.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Joseph H. P. Jackson, Hooshyar Assadullahi, Kazuya Koyama, Vincent Vernin, David Wands
Summary: This article demonstrates the usage of importance sampling for reconstructing the statistics of rare cosmological fluctuations in stochastic inflation. The authors developed a publicly available package, PYFPT, that addresses the first-passage time problem of generic one-dimensional Langevin processes and its relation to curvature perturbation. The proposed method is applied to quadratic inflation and benchmarked against semi-analytical results, showing excellent agreement within the estimated statistical error. The computation time is relatively fast and can achieve low probability values compared to the observable universe. The study also investigates the impact of large-field boundaries on the tail of the probability distribution and demonstrates that non-perturbative deviations from Gaussianity are not always of the simple exponential type.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Emir Gumrukcuoglu, Kazuya Koyama
Summary: We argue that cubic order interactions between scalar and tensor gravitons play crucial roles in the decay of gravitational waves and the gradient instabilities of scalar perturbations. However, the existence of an infinite number of higher order interactions in generic Λ³ models makes it difficult to predict the fate of these instabilities.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Levon Pogosian, Marco Raveri, Kazuya Koyama, Matteo Martinelli, Alessandra Silvestri, Gong-Bo Zhao, Jian Li, Simone Peirone, Alex Zucca
Summary: This study explores modifications of the standard cold dark matter cosmological model and identifies the necessary features for alternative theories to alleviate tensions between cosmological datasets. The results provide important constraints on modified gravity models and suggest that late-time dynamical dark energy and modifications of gravity may not offer a solution to certain tensions.
Article
Astronomy & Astrophysics
Bartolomeo Fiorini, Kazuya Koyama, Albert Izard
Summary: This study investigates the effects of two Modified Gravity (MG) theories on large-scale structure and validates the accuracy of fast approximate COLA simulations in predicting these effects. The results show that using the first three even multipoles of the redshift space power spectrum is sufficient to reproduce the influence of MG theories on the real space power spectrum. Additionally, the study highlights the importance of considering non-linear contributions and suggests that the effects of MG theories on the bispectrum and voids can be dominated by non-linear galaxy bias.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Multidisciplinary
A. D. Gow, H. Assadullahi, J. H. P. Jackson, K. Koyama, V. Vennin, D. Wands
Summary: We propose a non-perturbative method to calculate the abundance of primordial black holes based on an arbitrary one-point probability distribution function for the primordial curvature perturbation, P(zeta). This method is essential for considering non-Gaussianities that cannot be treated using conventional perturbative expansions. By relating zeta to a Gaussian field through equating cumulative distribution functions, we can determine the full statistics of the density field. We demonstrate that the intermediate regime, rather than the far tail, is responsible for the enhanced formation of primordial black holes, and show that non-Gaussianity significantly affects the shape of the primordial black hole mass distribution.
Article
Astronomy & Astrophysics
Guilherme Brando, Kazuya Koyama, Hans A. Winther
Summary: We revisit and extend a method proposed by R. Scoccimarro to incorporate the Vainshtein screening mechanism in N-body simulations, allowing for the study of Horndeski theories that evade the speed limit on gravitational waves. The method computes a scale-dependent gravitational coupling that accounts for the screening of the fifth-force, significantly reducing computational time and complexity compared to solving the full equation of motion. By implementing this method in a COmoving Lagrangian Approximation (COLA) code and comparing it with full N-body simulations, we validate its accuracy and find high agreement for the prediction of the boost function, a crucial quantity for beyond-ACDM models.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Marco Raveri, Levon Pogosian, Matteo Martinelli, Kazuya Koyama, Alessandra Silvestri, Gong -Bo Zhao
Summary: In this paper, a non-parametric reconstruction method is presented to determine three time-dependent functions in the cosmological model. The data constraints on the structure of these functions and their eigenmodes are analyzed. The results show that the combination of all data can constrain 15 combined eigenmodes of the three functions and explain the tensions between datasets.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Review
Physics, Particles & Fields
Pierre Auclair, David Bacon, Tessa Baker, Tiago Barreiro, Nicola Bartolo, Enis Belgacem, Nicola Bellomo, Ido Ben-Dayan, Daniele Bertacca, Marc Besancon, Jose J. Blanco-Pillado, Diego Blas, Guillaume Boileau, Gianluca Calcagni, Robert Caldwell, Chiara Caprini, Carmelita Carbone, Chia-Feng Chang, Hsin-Yu Chen, Nelson Christensen, Sebastien Clesse, Denis Comelli, Giuseppe Congedo, Carlo Contaldi, Marco Crisostomi, Djuna Croon, Yanou Cui, Giulia Cusin, Daniel Cutting, Charles Dalang, Valerio De Luca, Walter Del Pozzo, Vincent Desjacques, Emanuela Dimastrogiovanni, Glauber C. Dorsch, Jose Maria Ezquiaga, Matteo Fasiello, Daniel G. Figueroa, Raphael Flauger, Gabriele Franciolini, Noemi Frusciante, Jacopo Fumagalli, Juan Garcia-Bellido, Oliver Gould, Daniel Holz, Laura Iacconi, Rajeev Kumar Jain, Alexander C. Jenkins, Ryusuke Jinno, Cristian Joana, Nikolaos Karnesis, Thomas Konstandin, Kazuya Koyama, Jonathan Kozaczuk, Sachiko Kuroyanagi, Danny Laghi, Marek Lewicki, Lucas Lombriser, Eric Madge, Michele Maggiore, Ameek Malhotra, Michele Mancarella, Vuk Mandic, Alberto Mangiagli, Sabino Matarrese, Anupam Mazumdar, Suvodip Mukherjee, Ilia Musco, Germano Nardini, Jose Miguel No, Theodoros Papanikolaou, Marco Peloso, Mauro Pieroni, Luigi Pilo, Alvise Raccanelli, Sebastien Renaux-Petel, Arianna I. Renzini, Angelo Ricciardone, Antonio Riotto, Joseph D. Romano, Rocco Rollo, Alberto Roper Pol, Ester Ruiz Morales, Mairi Sakellariadou, Ippocratis D. Saltas, Marco Scalisi, Kai Schmitz, Pedro Schwaller, Olga Sergijenko, Geraldine Servant, Peera Simakachorn, Lorenzo Sorbo, Lara Sousa, Lorenzo Speri, Daniele A. Steer, Nicola Tamanini, Gianmassimo Tasinato, Jesus Torrado, Caner Unal, Vincent Vennin, Daniele Vernieri, Filippo Vernizzi, Marta Volonteri, Jeremy M. Wachter, David Wands, Lukas T. Witkowski, Miguel Zumalacarregui, James Annis, Feanor Reuben Ares, Pedro P. Avelino, Anastasios Avgoustidis, Enrico Barausse, Alexander Bonilla, Camille Bonvin, Pasquale Bosso, Matteo Calabrese, Mesut Caliskan, Jose A. R. Cembranos, Mikael Chala, David Chernoff, Katy Clough, Alexander Criswell, Saurya Das, Antonio da Silva, Pratika Dayal, Valerie Domcke, Ruth Durrer, Richard Easther, Stephanie Escoffier, Sandrine Ferrans, Chris Fryer, Jonathan Gair, Chris Gordon, Martin Hendry, Mark Hindmarsh, Deanna C. Hooper, Eric Kajfasz, Joachim Kopp, Savvas M. Koushiappas, Utkarsh Kumar, Martin Kunz, Macarena Lagos, Marc Lilley, Joanes Lizarraga, Francisco S. N. Lobo, Azadeh Maleknejad, C. J. A. P. Martins, P. Daniel Meerburg, Renate Meyer, Jose Pedro Mimoso, Savvas Nesseris, Nelson Nunes, Vasilis Oikonomou, Giorgio Orlando, Ogan Ozsoy, Fabio Pacucci, Antonella Palmese, Antoine Petiteau, Lucas Pinol, Simon Portegies Zwart, Geraint Pratten, Tomislav Prokopec, John Quenby, Saeed Rastgoo, Diederik Roest, Kari Rummukainen, Carlo Schimd, Aurelia Secroun, Alberto Sesana, Carlos F. Sopuerta, Ismael Tereno, Andrew Tolley, Jon Urrestilla, Elias C. Vagenas, Jorinde van de Vis, Rien van de Weygaert, Barry Wardell, David J. Weir, Graham White, Bogumila Swiezewska, Valery I. Zhdanov
Summary: This publication provides an overview of the latest advancements in LISA cosmology, including theory and methods, and identifies new opportunities to probe the universe using gravitational-wave observations by LISA.
LIVING REVIEWS IN RELATIVITY
(2023)
Article
Astronomy & Astrophysics
Ogan Ozsoy, Gianmassimo Tasinato
Summary: This study proposes a new method to probe inflationary models of primordial black hole (PBH) production by analyzing the characteristics of the primordial power spectrum profile, specifically focusing on the dip and surrounding scales. The research shows that the properties of PBH scenarios can be quantitatively studied by cross correlating CMB mu-distortions and temperature fluctuations, which may be tested in the next generation of CMB experiments.
Article
Astronomy & Astrophysics
Alice Garoffolo, Marco Raveri, Alessandra Silvestri, Gianmassimo Tasinato, Carmelita Carbone, Daniele Bertacca, Sabino Matarrese
Summary: In models of dynamical dark energy and gravity beyond the standard cosmological scenario, estimates of luminosity distance from electromagnetic and gravitational wave sources differ, leaving a unique imprint on the angular power-spectrum of fluctuations. By exploiting the synergy in supernovae and gravitational wave distance measurements, a joint estimator has been constructed to directly probe dark energy fluctuations, providing conclusive evidence for their existence. Additionally, this measurement can also allow for probing the running of the Planck mass, with experimental requirements discussed for detecting these signals.