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 ...
Gravitational waves are ripples in the fabric of spacetime caused by the acceleration of massive objects. When they pass through a region of space, they alter the distance between objects, making it possible to study elusive entities, such as black holes and neutron stars. In modern gravitational...
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 ...
Gravitational waves affect this fabric as well, causingripplelikedistortions. Previousstudieshave confirmed the existence of gravitational waves — which are generated by the acceleration (or deceleration) of massive objects — through indirect methods, but the LIGOfindis the first direct detection of th...
1. Thus, the detection of gravitational waves can be accomplished by monitoring the tiny changes in the distance between freely moving test masses. These changes are extremely small; for example, when the Hulse–Taylor binary system finally merges, the strong gravitational wave signal that will be...
Since 2015, the LIGO-Virgo-KAGRA Collaboration has detected about 85 pairs of black holes crashing into each other. We now know that Einstein was right:gravitational wavesare generated by these systems as they inspiral around each other, distorting space-time with their colossal masses as the...
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 generation of gravitational waves during inflation due to the non-linear coupling of scalar and tensor modes is discussed. Two methods describing gravitational wave perturbations are used and compared: a covariant and local approach, as well as a metric-based analysis based on the Bardeen formal...
Gravitational waves: squeezing out uncertainty for better detection Gravitational waves produced by cataclysmic events in the universe could be detected with greater sensitivity using an innovative optical procedure to reduce the uncertainties that quantum effects impose on existing laser-based methods. Gravit...
G. Sanchez, "Gravitational shock waves generated by extended sources: ultrarelativistic cosmic strings, monopoles and domain walls," Nuclear Physics B, vol. 355, pp. 231-249, 1991.C. O. Lousto, N. Sanchez, \Gravitational shock waves generated by extended sources: Ultrarelativistic cosmic ...