Lovely LISA

2019 ◽  
pp. 33-38
Author(s):  
Nicholas Mee
Keyword(s):  
Black Holes ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
European Space Agency ◽  
Supermassive Black Holes ◽  
Gravitational Wave Detector ◽  
Wave Detector ◽  
Lisa Pathfinder ◽  
Space Agency ◽  
Gravitational Wave Detectors

The European Space Agency (ESA) has plans to build a space-based gravitational wave detector known as LISA. The recent LISA Pathfinder mission has demonstrated that the technology required for LISA will be sufficiently sensitive to detect gravitational waves. LISA will detect events that are invisible to LIGO and other Earth-based gravitational wave detectors. These include the mergers of distant supermassive black holes.

scholarly journals Current and future status of gravitational wave astronomy - gravitational wave facilities

2006 ◽  
Vol 2 (14) ◽  
pp. 526-527
Author(s):  
Sheila Rowan
Keyword(s):  
Gravitational Wave ◽  
Gravitational Radiation ◽  
Direct Detection ◽  
Current Status ◽  
Gravitational Wave Detector ◽  
Paper Briefly ◽  
Wave Detector ◽  
Gravitational Wave Detectors ◽  
The Status ◽  
Future Status

AbstractCurrently a network of interferometric gravitational wave detectors is in operation around the globe, in parallel with existing acoustic bar-type detectors. Searches are underway aimed at the first direct detection of gravitational radiation from astrophysical sources. This paper briefly summarizes the current status of operating gravitational wave facilities, plans for future detector upgrades, and the status of the planned space-based gravitational wave detector LISA.

A CHAOTIC GRAVITATIONAL WAVE DETECTOR

1998 ◽  
Vol 13 (20) ◽  
pp. 1653-1665 ◽  
Author(s):  
JOHN ARGYRIS ◽  
CORNELIU CIUBOTARIU
Keyword(s):  
Gravitational Wave ◽  
Josephson Junction ◽  
Gravitational Waves ◽  
Quantum Chaos ◽  
Center Of Mass ◽  
Computer Experiments ◽  
High Sensitivity ◽  
Gravitational Wave Detector ◽  
Single Junction ◽  
Wave Detector

In this letter we signalize the possibility of applying a quantum chaos as an element of high sensitivity which serves to detect small changes in length generated by gravitational waves. We propose the construction of a double-bar antenna with a coupling Josephson junction in its center-of-mass. In fact the new antenna is a single Josephson junction with massive bulk contacts, like a single-junction SQUID but with free ends. Computer experiments demonstrate that very small changes generated by the variation of the distance between the bulk plates of the junction capacitance will produce a variety of very different intermittency routes to chaos. A concrete numerical example illustrates the smallness of a quantum of chaos and thus the extraordinary sensitivity of the proposed method.

scholarly journals Modelling a mechanical antenna for a calibrator for interferometric gravitational wave detector using finite elements method

2021 ◽  
Vol 2090 (1) ◽  
pp. 012157
Author(s):  
A R C Prado ◽  
F S Bortoli ◽  
N. S. Magalhaes ◽  
R N Duarte ◽  
C Frajuca ◽  
...  
Keyword(s):  
Finite Elements ◽  
Gravitational Wave ◽  
Finite Elements Method ◽  
Gravitational Wave Detector ◽  
Active Systems ◽  
Suspension Systems ◽  
Wave Detector ◽  
Active Suspension Systems ◽  
Gravitational Wave Detectors ◽  
Made In

Abstract Interferometric gravitational wave detectors (IGWD) are a very complex detector, the need to lock the detector in a dark fringe condition besides the vibrations that affect the mirrors, creates the necessity of using active suspension systems. These active systems make the system reach the desired sensitivity but make the calibration of such detectors much more difficult. To solve this problem a calibrator is proposed, a resonant mass gravitational wave detector could be used to detect the same signal in a narrower band and use the measured amplitude to calibrate the IGWD, as resonant mass gravitational wave detectors are easily calibrated. This work aims to design the mechanical antenna of such a calibrator. The main difficulty is to design the calibrator is the frequencies required to make the detection. These massive detectors usually were made in frequencies close to 1 kHz and the frequency range to operate for better sensitivity is around 100 Hz. The antenna is modelled in finite elements method and a design of such an antenna is presented.

scholarly journals Progress Toward a Space-Based Gravitational Wave Observatory

2015 ◽  
Vol 11 (A29B) ◽  
pp. 357-362
Author(s):  
Jeffrey C. Livas ◽  
Robin T. Stebbins
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Gamma Ray ◽  
European Space Agency ◽  
Gravity Gradient ◽  
Electromagnetic Spectrum ◽  
Space Agency ◽  
Pulsar Timing ◽  
The Universe ◽  
Gamma Ray Telescopes

AbstractThe discovery of binary pulsar PSR 1913+16 by Hulse & Taylor in 1974 established the existence of gravitational waves, for which the 1983 Nobel Prize was awarded. However, the measurement of astrophysical parameters from gravitational waves will open an entirely new spectrum for discovery and understanding of the Universe, not simply a new window in the electromagnetic spectrum like gamma ray telescopes in the 1970s. Two types of ground-based detectors, Advanced LIGO/Virgo and Pulsar Timing Arrays, are expected to directly detect gravitational waves in their respective frequency bands before the end of the decade. However, many of the most exciting sources are in the band from 0.1–100 mHz, accessible only from space due to seismic and gravity gradient noise on Earth. The European Space Agency (ESA) has chosen the 'Gravitational Universe' as the science theme for its L3 Cosmic Visions opportunity, planned for launch in 2034. NASA is planning to participate as a junior partner. Here we summarize progress toward realizing a gravitational wave observatory in space.

scholarly journals Pulsars and Gravitational Wave Detection

2005 ◽  
Vol 22 (3) ◽  
pp. 179-183 ◽  
Author(s):  
George Hobbs
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Radio Telescope ◽  
Gravitational Wave Detector ◽  
Gravitational Wave Detection ◽  
Wave Detection ◽  
Wave Detector ◽  
Stochastic Background ◽  
Pulsar Timing ◽  
Pulsar Timing Array

AbstractThe number of known millisecond pulsars has dramatically increased in the last few years. Regular observations of these pulsars may allow gravitational waves with frequencies ∼10−9 Hz to be detected. A ‘pulsar timing array’ is therefore complimentary to other searches for gravitational waves using ground-based or space-based interferometers that are sensitive to much higher frequencies. In this review we describe (1) the basic methods for using an array of pulsars as a gravitational wave detector, (2) the sources of the potentially detectable waves, (3) current limits on individual sources and a stochastic background, and (4) the new project recently started using the Parkes radio telescope.

THE AIGO PROJECT

2011 ◽  
Vol 20 (10) ◽  
pp. 2087-2092 ◽  
Author(s):  
L. JU ◽  
D. G. BLAIR ◽  
J. DAVIDSON ◽  
D. E. MCCLELLAND ◽  
J. MUNCH ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Southern Hemisphere ◽  
Large Scale ◽  
Gravitational Wave Detector ◽  
Wave Detector ◽  
Gravitational Wave Detectors

The AIGO project is the proposed southern hemisphere advanced large scale gravitational wave detector. With this southern hemisphere detector, the global array of ground based gravitational wave detectors will be substantially improved. Here we summarize the current plans for the AIGO detector.

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