Results 21 to 30 of about 2,107 (216)

Swift/UVOT: 18 Years of Long GRB Discoveries and Advances

open access: yesUniverse, 2023
The Neil Gehrels Swift Observatory (Swift) has been in operation for 18 years. The Ultra-Violet/Optical Telescope (UVOT) onboard Swift was designed to capture the earliest optical/UV emission from gamma-ray bursts (GRBs), spanning the first few minutes ...
Sam Oates
doaj   +1 more source

No tension between assembly models of super massive black hole binaries and pulsar observations

open access: yesNature Communications, 2018
Pulsar timing arrays enable the search for the isotropic gravitational-wave (GW) background originating from super massive black hole binary populations, but impose a stringent upper limit on the GW characteristic amplitude.
Hannah Middleton   +4 more
doaj   +1 more source

3D characterization of low optical absorption structures in large crystalline sapphire substrates for gravitational wave detectors

open access: yesScientific Reports, 2021
Very high-quality sapphire substrates are key elements of the cryogenic Japanese gravitational interferometer KAGRA, in which they are used to build the main mirrors, working as the test masses to sense the gravitational waves.
Manuel Marchiò   +3 more
doaj   +1 more source

Attitude-Orbit Coupled Control of Gravitational Wave Detection Spacecraft with Communication Delays

open access: yesSensors, 2023
In order to meet the position and attitude requirements of spacecrafts and test masses for gravitational-wave detection missions, the attitude-orbit coordination control of multiple spacecrafts and test masses is studied.
Yu Zhang   +4 more
doaj   +1 more source

Surrogate Forward Models for Population Inference on Compact Binary Mergers

open access: yesThe Astrophysical Journal, 2023
Rapidly growing catalogs of compact binary mergers from advanced gravitational wave detectors allow us to explore the astrophysics of massive stellar binaries.
Jeff Riley, Ilya Mandel
doaj   +1 more source

Quantum metrology for gravitational wave astronomy [PDF]

open access: yesNature Communications, 2010
Einstein's general theory of relativity predicts that accelerating mass distributions produce gravitational radiation, analogous to electromagnetic radiation from accelerating charges. These gravitational waves (GWs) have not been directly detected to date, but are expected to open a new window to the Universe once the detectors, kilometre-scale laser ...
Schnabel, Roman   +3 more
openaire   +5 more sources

Evidence for a Correlation between Binary Black Hole Mass Ratio and Black Hole Spins

open access: yesThe Astrophysical Journal, 2023
The astrophysical origins of the binary black hole systems seen with gravitational waves are still not well understood. However, features in the distribution of black hole masses, spins, redshifts, and eccentricities provide clues into how these systems ...
Christian Adamcewicz   +2 more
doaj   +1 more source

Introduction to Gravitational Wave Astronomy [PDF]

open access: yes, 2021
This chapter provides an overview of gravitational wave (GW) astronomy, providing background material that underpins the other, more specialized chapters in this handbook. It starts with a brief historical review of the development of GW astronomy, from Einstein's prediction of GWs in 1916 to the first direct detection in 2015.
openaire   +2 more sources

A Magnetospheric Dichotomy for Pulsars with Extreme Inclinations

open access: yesUniverse, 2021
In this work, we expand on a comment by Lyne et al. (2017), that intermittent pulsars tend to congregate near a stripe in the logarithmic period versus period-derivative diagram.
Fan Zhang
doaj   +1 more source

Gravitational wave astronomy with TianQin

open access: yesReports on Progress in Physics
Abstract The opening of the gravitational wave window has significantly enhanced our capacity to explore the Universe’s most extreme and dynamic sector. In the mHz frequency range, a diverse range of compact objects, from the most massive black holes at the farthest reaches of the Universe to the lightest white dwarfs in our cosmic ...
En-Kun 恩坤 Li 李   +52 more
openaire   +3 more sources

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