Gravitational waves are generated during first-order phase transitions, either by turbulence or by bubble collisions. If the transition takes place at temperatures of the order of the electroweak scale, the frequency of these gravitational waves is today just within the band of the planned space ...
For example, work is done to raise ocean tides by the changing tidal field of the moon and sun as the Earth rotates. Gravitational waves are produced by accelerating masses that produce time-varying tidal fields. Since the propagating tidal field can do work, gravitational waves must carry the...
Yes, the gravitational waves are generated during an era when the expansion rate of the universe is around the mass of the scalar field. It would stop beyond this point as particle production would be shut down at some point by the internal mechanism. When I say shortly after the Big ...
Gravitational waves from the early universe may allow probing back to the Planck era or to later eras when the perturbations in density that eventually gave rise to galaxies were generated. The sensitivities necessary to observe these phenomena are mentioned, and ways to increase interferometer ...
Figure 1: Gravitational waves generated by mergers between two neutron stars could reveal the creation of free quarks through such mergers. Credit: NASA’s Goddard Space Flight Center/CI Lab Gravitational waves could reveal whether the quark soup that existed in the early Universe is created ...
Such strongly lensed gravitational waves should be multiply imaged. We should be able to see multiple copies of the same signal which have taken different paths from the source and then are bent by the gravity of the lens to reach us at different times. The delay time between images depends...
The experimental effort to detect gravitational waves (GWs) had a first amazing success in 2015, when waves generated by the merger of two black holes were first detected by the LIGO and Virgo interferometers in the US and Italy. Now, the GW community is on the cusp of another incredible ...
Different from LIGO, the space-based probes will be used to detect gravitational waves at much lower frequencies, which are generated by the merging of massive or supermassive black holes, scientists say. The European Space Agency has also launched a space-based gravitational wave detection program...
P. et al. Observation of gravitational waves from a binary black hole merger. Phys. Rev. Lett. 116, 061102 (2016). Article ADS MathSciNet Google Scholar Abbott, B. P. et al. GWTC-1: a gravitational-wave transient catalog of compact binary mergers observed by LIGO and Virgo during ...
We study the gravitational shock waves generated by ultrarelativistic extended sources, mainly when cosmic strings (local, global, spinning and supeconducting) and other topological defects (monopoles and domain walls) are boosted and become ultrarelativistic. In this limit, the source travel at the ...