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
Matteo Braglia, Sachiko Kuroyanagi
Summary: This study investigates the effects of prerecombination physics on the stochastic gravitational wave background (SGWB) anisotropies and their cross-correlation with cosmic microwave background (CMB) temperature and E-mode polarization. Results show that the cross-correlation of CMB and SGWB anisotropies can improve constraints obtained with CMB alone, depending on the specific model and the capabilities of future gravitational wave interferometers.
Article
Physics, Applied
P. Grivickas, R. A. Austin, M. R. Armstrong, H. B. Radousky, J. L. Belof
Summary: This study investigates solid-solid phase transitions in Zr thin films using shock compression induced by a short laser pulse. The results show a direct transformation to a metastable beta-phase at lower shock pressures, and equilibrium beta at higher pressures. The onset times of the alpha-beta transformation are found to be less than 100 ps, with completion times less than 200 ps.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Astronomy & Astrophysics
William Giare, Alessandro Melchiorri
Summary: This paper investigates the robustness of assuming the tensor tilt as scale independent, showing that even a small scale dependence can remarkably affect the shape of the primordial spectrum and significantly change the final constraints when non-linear corrections are considered. The study also examines the scale dependence in two different physical models of inflation, providing examples of negligible scale dependence and non-negligible scale dependence.
Article
Astronomy & Astrophysics
Dustin R. Madison
Summary: This study develops a formalism to describe how gravitational wave bursts with memory (BWMs) influence the spatial pattern of temperature fluctuations in the cosmic microwave background (CMB). Toy models are used to show how BWMs mix power from spherical harmonic modes of different degrees into various other modes, providing important tools for future analyses incorporating the physics underlying the CMB.
Review
Astronomy & Astrophysics
Stanislav Alexeyev, Vyacheslav Prokopov
Summary: This paper reviews the possible ways to constrain extended gravity models at the scale of galaxy clusters, exploring their implications for various astrophysical phenomena and high-energy physics at the TeV scale. It highlights the significance of modern experimental and observational precise data in pushing the boundaries of our understanding beyond general relativity.
Article
Astronomy & Astrophysics
Jose Maria Ezquiaga
Summary: This study presents a novel approach to probe cosmological modifications of general relativity using GW data only, specifically focusing on deviations of the GW luminosity distance constrained with the astrophysical population of binary black holes. The hierarchical Bayesian analysis on the LIGO-Virgo catalog provides the strongest constraints to date on deviations from the GW luminosity distance, leading to important implications for the standard cosmological model and the determination of BBH masses. The findings suggest that testing gravity at large scales with the population of BBHs will become increasingly relevant with future catalogs, offering an independent and self-contained test of the standard cosmological model.
Article
Astronomy & Astrophysics
Yucheng Zhang, Anthony R. Pullen, Shadab Alam, Sukhdeep Singh, Etienne Burtin, Chia-Hsun Chuang, Jiamin Hou, Brad W. Lyke, Adam D. Myers, Richard Neveux, Ashley J. Ross, Graziano Rossi, Cheng Zhao
Summary: The study tests gravity at high redshift and large scales, finding that general relativity predictions hold true at various scales. The use of a large sample size and simulations for validation has potential for constraining modified gravity models in the future.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Cheng-Wei Chiang, Bo-Qiang Lu
Summary: This study investigates the gravitational waves produced by the Peccei-Quinn phase transition associated with the clockwork axion. The results show that GWs at different scales can be detected by different interferometers, and experimental data has excluded a significant portion of parameter space.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Multidisciplinary
Gen-Liang Li, Yong Tang, Yue-Liang Wu
Summary: The exact properties of dark matter remain largely unknown despite the accumulating evidence. This study finds that dark matter can have significant effects on the characteristic strain of gravitational waves, particularly at low and high frequencies. These effects become more pronounced as the density of dark matter increases.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Astronomy & Astrophysics
Nicola Bartolo, Daniele Bertacca, Robert Caldwell, Carlo R. Contaldi, Giulia Cusin, Valerio De Luca, Emanuela Dimastrogiovanni, Matteo Fasiello, Daniel G. Figueroa, Gabriele Franciolini, Alexander C. Jenkins, Marco Peloso, Mauro Pieroni, Arianna Renzini, Angelo Ricciardone, Antonio Riotto, Mairi Sakellariadou, Lorenzo Sorbo, Gianmassimo Tasinato, Jesus Torrado, Sebastien Clesse, Sachiko Kuroyanagi
Summary: We investigate the sensitivity of the Laser Interferometer Space Antenna (LISA) to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). By building a Signal-to-Noise estimator and performing a Fisher matrix analysis, we quantify the detectability of different multipoles by LISA. This study provides important information for understanding the origin of the SGWB and discriminating among different superimposed SGWB sources.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Felix Giese, Thomas Konstandin, Jorinde van de Vis
Summary: This study examines the potential of LISA to detect features of gravitational wave spectra from cosmological first-order phase transitions, focusing on double-broken power law spectra. Analysis using mock data indicates challenges in observing two break frequencies from the electroweak phase transition due to frequency shift caused by strong phase transitions. The research reveals differences between signals from the sound shell model and simulations.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Despoina Pazouli, Konstantinos Palapanidis, Anastasios Avgoustidis, Edmund J. Copeland
Summary: This study estimates the number of cusp events from cosmic string loops using a binary tree model, calculating for different numbers of cusps supported and harmonic distributions. The results are plotted in terms of event rate of gravitational waves in relation to redshift.
Article
Chemistry, Multidisciplinary
Wenchao Lu, Chandika Amarasinghe, Emily Zhang, Andrew Martin, Sumanjeet Kaur, Ravi Prasher, Musahid Ahmed
Summary: Understanding phase changes in hydrogen-bonded solid-state systems is crucial for thermal science and medical therapeutics. Different spectroscopic techniques can provide a detailed molecular picture of these changes in polyols and other substances.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Astronomy & Astrophysics
Juan Garcia-Bellido, Hitoshi Murayama, Graham White
Summary: It has been suggested that Gaia has the potential to detect a stochastic gravitational wave background in a frequency range ideal for studying phase transitions in early universe cosmology. Additionally, Gaia could be used to differentiate between primordial black holes produced during early universe transitions and those expected from the QCD epoch. Furthermore, Gaia may play a role in exploring topological defects and shedding light on recent NANOGrav results.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Education, Scientific Disciplines
Katherine Brown, Harsh Mathur, Mike Verostek
AMERICAN JOURNAL OF PHYSICS
(2018)
Article
Physics, Multidisciplinary
Katherine Brown, Roshan Abraham, Leo Kell, Harsh Mathur
NEW JOURNAL OF PHYSICS
(2018)
Article
Optics
Katherine Jones-Smith, Harsh Mathur
Article
Optics
Anirudh Dasarathy, Joshua P. Isaacson, Katherine Jones-Smith, Jason Tabachnik, Harsh Mathur
Article
Astronomy & Astrophysics
Katherine Jones-Smith, Harsh Mathur, Tanmay Vachaspati
Article
Physics, Fluids & Plasmas
Katherine Jones-Smith, Harsh Mathur, Lawrence M. Krauss
Article
Physics, Multidisciplinary
Katherine Jones-Smith, Lawrence M. Krauss, Harsh Mathur
PHYSICAL REVIEW LETTERS
(2008)
Article
Physics, Multidisciplinary
Foster Thompson, Katherine Brown, Harsh Mathur, Kristin Mckee
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2018)
Proceedings Paper
Astronomy & Astrophysics
Daniel Baumann, Mark G. Jackson, Peter Adshead, Alexandre Amblard, Amjad Ashoorioon, Nicola Bartolo, Rachel Bean, Maria Beltran, Francesco de Bernardis, Simeon Bird, Xingang Chen, Daniel J. H. Chung, Loris Colombo, Asantha Cooray, Paolo Creminelli, Scott Dodelson, Joanna Dunkley, Cora Dvorkin, Richard Easther, Fabio Finelli, Raphael Flauger, Mark P. Hertzberg, Katherine Jones-Smith, Shamit Kachru, Kenji Kadota, Justin Khoury, William H. Kinney, Eiichiro Komatsu, Lawrence M. Krauss, Julien Lesgourgues, Andrew Liddle, Michele Liguori, Eugene Lim, Andrei Linde, Sabino Matarrese, Harsh Mathur, Liam McAllister, Alessandro Melchiorri, Alberto Nicolis, Luca Pagano, Hiranya V. Peiris, Marco Peloso, Levon Pogosian, Elena Pierpaoli, Antonio Riotto, Uros Seljak, Leonardo Senatore, Sarah Shandera, Eva Silverstein, Tristan Smith, Pascal Vaudrevange, Licia Verde, Ben Wandelt, David Wands, Scott Watson, Mark Wyman, Amit Yadav, Wessel Valkenburg, Matias Zaldarriaga
CMB POLARIZATION WORKSHOP: THEORY AND FOREGROUNDS: CMBPOL MISSION CONCEPT STUDY
(2009)
Article
Physics, Multidisciplinary
Lawrence M. Krauss, Katherine Jones-Smith, Dragan Huterer
NEW JOURNAL OF PHYSICS
(2007)
Letter
Multidisciplinary Sciences
Katherine Jones-Smith, Harsh Mathur
