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Dropping Anchor: Understanding the Populations of Binary Black Holes with Random and Aligned-spin Orientations

open access: yesThe Astrophysical Journal, 2023
The relative spin orientations of black holes (BHs) in binaries encode their evolutionary history: BHs assembled dynamically should have isotropically distributed spins, while spins of BHs originating in the field should be aligned with the orbital ...
Vishal Baibhav   +2 more
doaj   +1 more source

Searches for continuous-wave gravitational radiation

open access: yesLiving Reviews in Relativity, 2023
Now that detection of gravitational-wave signals from the coalescence of extra-galactic compact binary star mergers has become nearly routine, it is intriguing to consider other potential gravitational-wave signatures.
Keith Riles
doaj   +1 more source

Waltzing Binaries: Probing the Line-of-sight Acceleration of Merging Compact Objects with Gravitational Waves

open access: yesThe Astrophysical Journal, 2023
The line-of-sight acceleration of a compact binary coalescence (CBC) event would modulate the shape of the gravitational waves (GWs) it produces with respect to the corresponding nonaccelerated CBC.
Aditya Vijaykumar   +4 more
doaj   +1 more source

Multimessenger Probes of High-energy Sources [PDF]

open access: yesEPJ Web of Conferences, 2019
Multimessenger observations may hold the key to learn about the most energetic sources in the universe. The recent construction of large scale observatories opened new possibilities in testing non thermal cosmic processes with alternative probes, such as
Guetta Dafne
doaj   +1 more source

Measuring the Hubble Constant with Dark Neutron Star–Black Hole Mergers

open access: yesThe Astrophysical Journal, 2023
Detection of gravitational waves (GWs) from neutron star-black hole (NSBH) standard sirens provides local measurements of the Hubble constant ( H _0 ), regardless of the detection of an electromagnetic (EM) counterpart, given that matter effects can be ...
Banafsheh Shiralilou   +6 more
doaj   +1 more source

GRB 211211A-like Events and How Gravitational Waves May Tell Their Origins

open access: yesThe Astrophysical Journal Letters, 2023
GRB 211211A is a rare burst with a genuinely long duration, yet its prominent kilonova association provides compelling evidence that this peculiar burst was the result of a compact binary merger.
Yi-Han Iris Yin   +7 more
doaj   +1 more source

Gravitational wave emission from the CMB and other thermal fields

open access: yesPhysics Letters B, 2021
We calculate the gravitational wave power density emitted by quantum thermal sources. As particular cases, we calculate the emission of gravitational waves from the cosmic microwave background and from stellar sources.
Petar Simidzija   +2 more
doaj   +1 more source

Barrow entropy and stochastic gravitational wave background generated from cosmological QCD phase transition

open access: yesPhysics Letters B, 2023
In this work we investigate the stochastic gravitational wave background generated during the first-order cosmological QCD phase transition of the early universe in the framework of the Barrow entropy.
Qi-Min Feng   +3 more
doaj   +1 more source

Strongly Lensed Supermassive Black Hole Binaries as Nanohertz Gravitational-wave Sources

open access: yesThe Astrophysical Journal, 2023
Supermassive black hole binary systems (SMBHBs) should be the most powerful sources of gravitational waves (GWs) in the universe. Once pulsar timing arrays (PTAs) detect the stochastic GW background from their cosmic merger history, searching for ...
Nicole M. Khusid   +4 more
doaj   +1 more source

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