Radiation by an Aperture in a Planar Screen Illuminated by a Gaussian Beam at Optical Frequencies for Studying Baffle Scattering in Interferometric Detectors of Gravitational Waves

2018 ◽  
Author(s):  
G. Pelosi ◽  
L. Possenti ◽  
S. Selleri ◽  
I.M. Pinto
Keyword(s):  
Gravitational Waves ◽  
Gaussian Beam ◽  
Interferometric Detectors

scholarly journals Status of Advanced Virgo

2018 ◽  
Vol 182 ◽  
pp. 02003
Author(s):  
F. Acernese ◽  
T. Adams ◽  
K. Agatsuma ◽  
L. Aiello ◽  
A. Allocca ◽  
...  
Keyword(s):  
Gravitational Waves ◽  
Early Stage ◽  
Signal To Noise Ratio ◽  
Washington State ◽  
Mutual Distance ◽  
Wave Source ◽  
The Usa ◽  
Interferometric Detectors ◽  
Free Falling ◽  
The Universe

The LIGO and the Virgo collaborations have recently announced the first detections of Gravitational Waves. Due to their weak amplitude, Gravitational Waves are expected to produce a very small effect on free-falling masses, which undergo a displacement of the order of 10-18 m for a Km-scale mutual distance. This discovery showed that interferometric detectors are suitable to reveal such a feeble effect, and therefore represent a new tool for astronomy, astrophysics and cosmology in the understanding of the Universe. To better reconstruct the position of the Gravitational Wave source and increase the signal-to-noise ratio of the events by means of multiple coincidence, a network of detectors is necessary. In the USA, the LIGO project has recently concluded its second Observation Run (O2) with a couple of twin 4 kilometer-long arms detectors which are placed in Washington State and Louisiana. Advanced VIRGO (AdV) is a 3 kilometer-long arms second generation interferometer situated in Cascina, near Pisa in Italy. The installation of AdV has been completed in 2016, and the first commissioning phase allowed to get to the target early-stage sensitivity, which was sufficient to join LIGO in the O2 scientific run. In this paper, the challenges of the commissioning of AdV will be presented, together with its current performances and future perspectives. Finally, in the last paragraph the latest discoveries that occurred after the ICNFP 2017 conference will be also described.

A parallel Beowulf-based system for the detection of gravitational waves in interferometric detectors

2003 ◽  
Vol 153 (2) ◽  
pp. 179-189 ◽  
Author(s):  
P. Amico ◽  
L. Bosi ◽  
C. Cattuto ◽  
L. Gammaitoni ◽  
F. Marchesoni ◽  
...  
Keyword(s):  
Gravitational Waves ◽  
Interferometric Detectors

scholarly journals Post-Newtonian Expansion of Gravitational Waves from a Particle in Circular Orbits around a Rotating Black Hole: Effects of Black Hole Absorption

1999 ◽  
Vol 183 ◽  
pp. 163-163
Author(s):  
Hideyuki Tagoshi ◽  
Shuhei Mano ◽  
Eiichi Takasugi
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Energy Absorption ◽  
Absorption Rate ◽  
Kerr Black Hole ◽  
Compact Binaries ◽  
Wave Forms ◽  
Teukolsky Equation ◽  
Interferometric Detectors ◽  
Near Future

Coalescing compact binaries are the most promising candidates for detection by near-future, ground based laser interferometric detectors. It is very important to investigate detailed wave forms from coalescing compact binaries. When one (or two) of the stars is a black hole, some of those waves are absorbed by the black hole. Here, we consider a case when a test particle moves circular orbit on the equatorial plane around a Kerr black hole, and calculate the the energy absorption rate by the black hole. We adopt an analytic techniques for the Teukolsky equation which was found by Mano, Suzuki, and Takasugi (1996). We calculated the energy absorption rate to O((v/c)13) beyond the Newtonian-quadrupole formula of gravitational waves radiated to infinity, assuming v/c ≪ 1. Here v is the velocity of the particle. We find that, when a black hole is rotating, the black hole absorption appear at O((v/c)5) beyond the Newtonian-quadrapole formula. These effects become more important as the mass of the black hole becomes larger. We also found that the black hole absorption is more important when a particle moves to the same direction of the black hole rotation. All the details of this paper is presented in Tagoshi et al. (1997).

scholarly journals DETECTION OF GRAVITATIONAL WAVES FROM INSPIRALING, COMPACT BINARIES USING A NETWORK OF INTERFEROMETRIC DETECTORS

2000 ◽  
Vol 09 (03) ◽  
pp. 325-329 ◽  
Author(s):  
SUKANTA BOSE ◽  
ARCHANA PAI ◽  
SANJEEV DHURANDHAR
Keyword(s):  
Data Analysis ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Analysis Problem ◽  
Compact Binaries ◽  
Correlation Vector ◽  
Compact Binary ◽  
Interferometric Detectors ◽  
First Time ◽  
Laser Interferometric

We formulate the data analysis problem for the detection of the Newtonian waveform from an inspiraling, compact binary by a network of arbitrarily oriented and arbitrarily located laser interferometric gravitational-wave detectors. We obtain for the first time the relation between the optimal statistic and the magnitude of the network correlation vector, which is constructed from the matched network-filter.

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