Conveners
Gravitational waves: parallel session 1
- Erik Katsavounidis (MIT)
Gravitational waves: parallel session 2
- Erik Katsavounidis (MIT)
Gravitational waves: parallel session 3
- Viviana Fafone (INFN e Universita Roma Tor Vergata (IT))
The talk will present the status of the Virgo interferometer for the preparation of the fourth Observing Run (O4), started on May 25th. An overview of the hardware upgrades the detector has undergone in the past years and of the commissioning activities will be given, focusing on the instrument's performances in terms of sensitivity and duty cycle.
KAGRA is a gravitational wave detector located at Kamioka in Japan. KAGRA has two unique key features compared to the other ground-based gravitational wave detectors: One is constructed at the underground site and the other is utilizing cryogenic sapphire mirrors for the main mirrors. Underground site has a smaller seismic vibration, which is one of the dominant noise sources at low frequency...
In the present work it is presented a formulation of a new control strategy for the angular degrees of freedom of a Fabry-Perot cavity in the presence of radiation pressure effect for Advanced Virgo+ (AdV+) Phase II experiment. The main difference with Phase I configuration is the introduction of large terminal masses. The different physical dimensions of the two masses and the consequent...
Large-scale Cryogenic Gravitational-Wave Telescope, KAGRA, is a second-generation gravitational-wave detector (GWD) in Japan. The features distinguishing KAGRA from other GWDs are its underground location and the cryogenic operation of the four main mirrors. The underground location provides a quiet site with low seismic noise, while the cryogenic operation cools the mirrors down to 20 K,...
Low-frequency changes of atmospheric pressure contribute to measurement noise of gravity detectors. On one hand, changes of frequency around 0.1 Hz and less cause tilt of the ground and the instrument placed on it. This results undesirable components of long-wavelength and large amplitude in the signal of torsion balances. On the other hand, infrasound waves propagating in the atmosphere...
The 5n-vector ensemble method is a statistical multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this presentation, I show the results of the 5n-vector ensemble method...
Utilising data from the direct detections of compact binary coalescences (CBCs) in the first three observing runs of the LIGO-Virgo-KAGRA Collaboration (LVK), we estimate the redshift dependence of the binary black hole (BBH) population. Specifically, we search for signs that the mass distribution of BBHs varies over cosmic history. The detection of such variation would allow us to gain more...
Current parameter estimation techniques for coalescence of compact binaries assume just one event in the data stream. With the low detection rate of current interferometers, it has not been a problem so far, as overlapping signals are highly improbable. This will change with the next generation (3G) of detectors, like Cosmic Explorer and Einstein Telescope, with hundreds of overlaps per year....
Many gravitational-wave events from mergers of binary stars consisting of black holes and neutron stars have been observed, while gravitational waves from supernovae have not been observed yet.
Investigating temporal changes in the frequency and amplitude of gravitational waves is important for studying the physics of gravitational wave sources. For time-frequency analysis of gravitational...
The dawn of gravitational-wave (GW) astronomy in the last decade has propelled our understanding of many areas of astrophysics. Most notably, GW170817, the first binary neutron star merger observed in both GWs and electromagnetic (EM) waves, kickstarted the age of multi-messenger GW astronomy. With the onset of the LVK Collaboration's O4 and upcoming EM instruments, multi-messenger...
The Astrophysical Multimessenger Observatory Network (AMON) aims to connect the world's leading high-energy and multimessenger observatories. AMON looks to evoke the discovery of new multimessenger phenomena, exploit these phenomena as tools for fundamental physics and astrophysics, and explore for multimessenger activity in archival datasets. Here we present a summary of the current...
Core Collapse supernovae are among the most interesting source of possible multimessenger detections, given the joint production of electromagnetic, neutrino and gravitational waves (GW). In this work we investigate the correlation of SASI structure of neutrino and GW to enhance the GW detection. We compare different search analyses for the case of a benchmark three-dimensional CCSN simulation...
Due to its unique geophysical features and to the low population density of the area, Sos Enattos is a promising candidate site to host the Einstein Telescope (ET), the third-generation Gravitational Wave Observatory. The characterization of the Sos Enattos former mine, close to one of the proposed ET corners, started in 2010 with the deployment of seismic and environmental sensors...
We designed MoonLIGHT (Moon Laser Instrumentation for General relativity/geophysics High accuracy Tests), a single 100 mm-large next-generation lunar retroreflector for lunar laser ranging operations, able to support a millimeter range accuracy and below. MoonLIGHT and its automated, dual MoonLIGHT Pointing Actuator (MPAc) has been selected by ESA for launch in NASA’s programs Commercial Lunar...
We illustrate a comprehensive study of the 2HDM+a coupled with Dark Matter, including constraints from collider and dedicated Dark Matter searches. We also illustrate the outcome analysis of the cosmic phase transitions and the gravitational wave spectrum that are implied by the model and show the prospects for observing the signal of such gravitational waves in near future experiments such as...
The presence of dark matter overdensities surrounding a black hole can influence the evolution of a binary system. The gravitational wave signals emitted by a black hole binary offer a promising means to probe the dark matter environments near a black hole. The dense region of dark matter can lead to the dephasing of gravitational waveforms, which can be detected by upcoming experiments such...
Restoration of left-right symmetry at high energy scales provides a well-motivated extension of the Standard Model, which has been scrutinized over the past few decades, chiefly in context of collider experiments. In my talk I will present a complementary approach and investigate whether these models can be probed via the search for a stochastic gravitational wave background induced by the...
