Article
Astronomy & Astrophysics
Aleksandra Piorkowska-Kurpas, Shaoqi Hou, Marek Biesiada, Xuheng Ding, Shuo Cao, Xilong Fan, Seiji Kawamura, Zong-Hong Zhu
Summary: The emergence of gravitational wave astronomy has sparked interest in exploring the low-frequency GW spectrum, leading to the development of satellite observatories like DECIGO and B-DECIGO to cover this range. Population synthesis methods were used to forecast detection rates and gravitational lensing rates, demonstrating the potential significance of these observatories in the field of GW astronomy.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Nicholas Loutrel, Richard Brito, Andrea Maselli, Paolo Pani
Summary: The study investigates the dynamics of binary systems and gravitational wave corrections due to mass quadrupole effects. The results suggest that phase constraints can be achieved with gravitational wave detectors under certain conditions.
Article
Astronomy & Astrophysics
Samanwaya Mukherjee, Sayak Datta, Srishti Tiwari, Khun Sang Phukon, Sukanta Bose
Summary: The study investigates the effects of tidal heating on gravitational waves, probing the observability of horizon parameters. Results suggest the possibility of more precise measurements of horizon parameters in third-generation detectors, making tidal heating a potential tool to identify the presence or absence of horizons in coalescing compact binaries.
Article
Astronomy & Astrophysics
Simone Albanesi, Andrea Placidi, Alessandro Nagar, Marta Orselli, Sebastiano Bernuzzi
Summary: We introduce a new paradigm for constructing accurate analytic waveforms for eccentric compact binaries. Our approach is based on the standard post-Newtonian (PN) method but incorporates implicit time derivatives of phase space variables and uses effective-one-body (EOB) procedures to resum the waveform. Testing our prescription against exact results, we find improved agreement with the use of exact equations of motion and observe convergence between Newtonian, 1PN, and 2PN results. This approach has potential applications in gravitational wave detectors.
Article
Astronomy & Astrophysics
Lisa Randall, Alexandra Shelest, Zhong-Zhi Xianyu
Summary: This article introduces a method for estimating the signal-to-noise ratio of inspiraling binary systems at low frequencies, as well as how to apply this method to accurately identify the origin of black hole mergers. The method approximates the signal-to-noise ratio using a constant-noise curve and allows for frequency dependence, expanding the range of applicability.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Teagan A. Clarke, Isobel M. Romero-Shaw, Paul D. Lasky, Eric Thrane
Summary: This study explores the impact of the argument of periapsis on gravitational waveforms and its effect on the inference of astrophysical parameters. The research finds that the argument of periapsis could have an impact on waveform analysis, but the systematic error in previous low-eccentricity analyses is likely to be small.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Leo Tsukada, Prathamesh Joshi, Shomik Adhicary, Richard George, Andre Guimaraes, Chad Hanna, Ryan Magee, Aaron Zimmerman, Pratyusava Baral, Amanda Baylor, Kipp Cannon, Sarah Caudill, Bryce Cousins, Jolien D. E. Creighton, Becca Ewing, Heather Fong, Patrick Godwin, Reiko Harada, Yun-Jing Huang, Rachael Huxford, James Kennington, Soichiro Kuwahara, Alvin K. Y. Li, Duncan Meacher, Cody Messick, Soichiro Morisaki, Debnandini Mukherjee, Wanting Niu, Alex Pace, Cort Posnansky, Anarya Ray, Surabhi Sachdev, Shio Sakon, Divya Singh, Ron Tapia, Takuya Tsutsui, Koh Ueno, Aaron Viets, Leslie Wade, Madeline Wade
Summary: This study discusses new features developed for the GstLAL-based inspiral pipeline, which have been shown to improve the pipeline's sensitivity by approximately 15% to 20% through an injection study, paving the way for further multimessenger observations during the upcoming observing run.
Article
Astronomy & Astrophysics
Yi-Fan Wang, Alexander H. Nitz
Summary: This study discusses the possibility of subsolar mass black hole binaries, originating either from primordial sources or dark matter, and explores different channels of binary formation, as well as the impact of gravitational wave frequency and eccentricity. The research also examines the ability to detect eccentric gravitational-wave signals using simulated data and matching-filtering targeted search methods, revealing a potential mismatch between ideal detection rates and actual detection rates due to eccentricity in the gravitational wave signal.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Kanchan Soni, Bhooshan Uday Gadre, Sanjit Mitra, Sanjeev Dhurandhar
Summary: This study presents the successful implementation of a hierarchical search method based on PyCBC in analyzing data from the Laser Interferometer Gravitational Wave Observatory (LIGO) observing runs. By performing matched filtering and coarse search on the data, followed by a finer search on candidate events, significant computational cost reduction is achieved without compromising sensitivity.
Article
Astronomy & Astrophysics
Zeyuan Xuan, Smadar Naoz, Xian Chen
Summary: This paper investigates the non-negligible eccentricity of gravitational wave sources in the LISA band and the potential acceleration they can undergo due to the presence of a tertiary. The study develops analytical and numerical methods to quantify how the eccentricity of a compact binary enhances the detection of its acceleration. The results show that the general relativistic precession pattern can separate the acceleration-induced frequency shift from the chirp-mass-induced frequency shift, reducing the signal-to-noise ratio requirement for distinguishing the acceleration by a factor of 10-100. Moreover, by adopting GW templates for accelerating eccentric compact binaries, the accuracy of the acceleration measurement can be enhanced by a factor of 100 compared to the zero-eccentricity case, and the source's acceleration can be detected even if it remains constant during the observational time.
Article
Astronomy & Astrophysics
Nicholas Loutrel
Summary: This study examines the breakdown of non-stationary phase approximation in eccentric Keplerian orbits and finds that the approximation holds under specific conditions of Fourier frequency.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
B. P. Gompertz, M. Nicholl, P. Schmidt, G. Pratten, A. Vecchio
Summary: The confirmation of the first neutron star-black hole (NS-BH) binary mergers by the LIGO, Virgo, and KAGRA collaboration allows for further investigation into these events. The tilt angle of the black hole's spin relative to the binary's orbital angular momentum vector is discussed, along with the implications for the physical processes that determine this tilt. The early sample of NS-BH events suggests efficient mass transfer and the possibility of more massive NS-BH binaries merging before completing their evolution. Future gravitational-wave detections are predicted to continue displaying similar total binary masses and mass ratios. However, a high mass candidate event may imply a dynamical capture origin, and large tilts in merging NS-BH systems would hinder electromagnetic detection prospects.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Ziming Wang, Junjie Zhao, Zihe An, Lijing Shao, Zhoujian Cao
Summary: Compact binaries are important sources of gravitational waves that can be detected by current and future observatories. By studying gravitational waves from binary neutron stars and binary black holes, we can investigate alternative theories to general relativity. The parameterized analysis of the dipolar gravitational radiation and varying gravitational constant provides simultaneous bounds, with space-based detectors offering tighter constraints.
Article
Astronomy & Astrophysics
Sayantani Datta, Anuradha Gupta, Shilpa Kastha, K. G. Arun, B. S. Sathyaprakash
Summary: Multiband gravitational wave astronomy involves observing gravitational waves in different frequency bands to test general relativity. By conducting multiband observations of intermediate-mass binary black holes, multiple post-Newtonian coefficients can be measured simultaneously, leading to stricter constraints on modifications to GR. The improvement from multibanding often exceeds the best bounds from individual observatories due to the lifting of degeneracies among parameters when combining information from different detectors.
Article
Physics, Multidisciplinary
Barry Wardell, Adam Pound, Niels Warburton, Jeremy Miller, Leanne Durkan, Alexandre Le Tiec
Summary: We generate gravitational waveforms for nonspinning compact binaries undergoing a quasicircular inspiral using a two-timescale expansion of the Einstein equations in second-order self-force theory. Our results demonstrate remarkable agreement with those obtained from full numerical relativity, even for comparable-mass systems, indicating the effectiveness of our approach. This research has significant implications for accurately modeling extreme-mass-ratio inspirals for the LISA mission and intermediate-mass-ratio systems currently observed by the LIGO-Virgo-KAGRA Collaboration.
PHYSICAL REVIEW LETTERS
(2023)