A5058388217- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- Astrophysical Phenomena and Observations
- Advanced Frequency and Time Standards
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Seismic Waves and Analysis
- Advanced Fiber Laser Technologies
- Astronomical Observations and Instrumentation
- Atomic and Subatomic Physics Research
- High-pressure geophysics and materials
- Cold Atom Physics and Bose-Einstein Condensates
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Measurement and Metrology Techniques
- Statistical and numerical algorithms
- Spectroscopy and Laser Applications
- Advanced Photonic Communication Systems
- Terahertz technology and applications
- Magnetic confinement fusion research
- Microwave Engineering and Waveguides
- Particle Accelerators and Free-Electron Lasers
Fonctions Optiques pour les Technologies de l’information
2017-2025
Université de Rennes
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université Rennes 2
2019-2024
Institut de Physique de Rennes
2010-2021
Laboratoire Albert Fert
2019
Goddard Space Flight Center
2014
Centre de Gestion Scientifique
2014
Observatoire de la Côte d’Azur
2003-2012
Max Planck Innovation
2012
Advanced Virgo is the project to upgrade interferometric detector of gravitational waves, with aim increasing number observable galaxies (and thus detection rate) by three orders magnitude. The now in an advanced construction phase and assembly integration will be completed end 2015. part a network, alongside two LIGO detectors US GEO HF Germany, goal contributing early waves opening new window observation on universe. In this paper we describe main features outline status construction.
We report the observation of a gravitational-wave signal produced by coalescence two stellar-mass black holes. The signal, GW151226, was observed twin detectors Laser Interferometer Gravitational-Wave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. initially identified within 70 s an online matched-filter search targeting binary coalescences. Subsequent off-line analyses recovered GW151226 with network signal-to-noise ratio 13 and significance greater than 5 $\sigma$. persisted in...
The LIGO detection of GW150914 provides an unprecedented opportunity to study the two-body motion a compact-object binary in large-velocity, highly nonlinear regime, and witness final merger excitation uniquely relativistic modes gravitational field. We carry out several investigations determine whether is consistent with black-hole general relativity. find that remnant's mass spin, as determined from low-frequency (inspiral) high-frequency (postinspiral) phases signal, are mutually solution...
In 2009-2010, the Laser Interferometer Gravitational-wave Observa- tory (LIGO) operated together with international partners Virgo and GEO600 as a network to search for gravitational waves of astrophysical origin. The sensitiv- ity these detectors was limited by combination noise sources inherent instrumental design its environment, often localized in time or frequency, that couple into gravitational-wave readout. Here we review performance LIGO instruments during this epoch, work done...
We present an up-to-date, comprehensive summary of the rates for all types compact binary coalescence sources detectable by Initial and Advanced versions ground-based gravitational-wave detectors LIGO Virgo. Astrophysical estimates compact-binary depend on a number assumptions unknown model parameters, are still uncertain. The most confident among these rate predictions coalescing neutron stars which based extrapolations from observed pulsars in our Galaxy. These yield likely 100 per Myr...
On September 14, 2015, the Laser Interferometer Gravitational-Wave Observatory (LIGO) detected a gravitational-wave transient (GW150914); we characterize properties of source and its parameters. The data around time event were analyzed coherently across LIGO network using suite accurate waveform models that describe gravitational waves from compact binary system in general relativity. GW150914 was produced by nearly equal mass black hole masses 36_{-4}^{+5}M_{⊙} 29_{-4}^{+4}M_{⊙}; for each...
The first observational run of the Advanced LIGO detectors, from September 12, 2015 to January 19, 2016, saw detections gravitational waves binary black hole mergers. In this paper we present full results a search for merger signals with total masses up $100 M_\odot$ and detailed implications our observations these systems. Our search, based on general-relativistic models wave systems, unambiguously identified two signals, GW150914 GW151226, significance greater than $5\sigma$ over observing...
The discovery of the gravitational-wave source GW150914 with Advanced LIGO detectors provides first observational evidence for existence binary black-hole systems that inspiral and merge within age Universe. Such mergers have been predicted in two main types formation models, involving isolated binaries galactic fields or dynamical interactions young old dense stellar environments. measured masses robustly demonstrate relatively "heavy" black holes ($\gtrsim 25\, M_\odot$) can form nature....
Following a major upgrade, the two advanced detectors of Laser Interferometer Gravitational-wave Observatory (LIGO) held their first observation run between September 2015 and January 2016. With strain sensitivity 10^{-23}/sqrt[Hz] at 100 Hz, product observable volume measurement time exceeded that all previous runs within 16 days coincident observation. On 14, 2015, Advanced LIGO observed transient gravitational-wave signal determined to be coalescence black holes [B. P. Abbott et al.,...
On September 14, 2015 at 09:50:45 UTC the two detectors of Laser Interferometer Gravitational-wave Observatory (LIGO) simultaneously observed binary black hole merger GW150914. We report results a matched-filter search using relativistic models compact-object binaries that recovered GW150914 as most significant event during coincident observations between LIGO from 12 to October 20, 2015. was with matched filter signal-to-noise ratio 24 and false alarm rate estimated be less than 1 per...
The LIGO detection of the gravitational wave transient GW150914, from inspiral and merger two black holes with masses ≳30M⊙, suggests a population binary relatively high mass. This observation implies that stochastic gravitational-wave background holes, created incoherent superposition all merging binaries in Universe, could be higher than previously expected. Using properties we estimate energy density such holes. In most sensitive part Advanced Virgo band for backgrounds (near 25 Hz),...
Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the limit is injection squeezed vacuum states light into interferometer's dark port. Here, we report on successful application this technology improve shot sensitivity Advanced Virgo detector. A enhancement up 3.2±0.1 dB beyond achieved. This nonclassical improvement corresponds 5%–8% increase binary neutron star horizon. The squeezing was...
On 14 September 2015, a gravitational wave signal from coalescing black hole binary system was observed by the Advanced LIGO detectors. This paper describes transient noise backgrounds used to determine significance of event (designated GW150914) and presents results investigations into potential correlated or uncorrelated sources in detectors around time event. The were operating nominally at GW150914. We have ruled out environmental influences non-Gaussian instrument either detector as...
This paper presents a complete description of Virgo, the French-Italian gravitational wave detector. The detector, built at Cascina, near Pisa (Italy), is very large Michelson interferometer, with 3 km-long arms. In this paper, following presentation physics requirements, leading to specifications for construction detailed all its different elements given. These include civil engineering infrastructures, huge ultra-high vacuum (UHV) chamber (about 6000 cubic metres), optical components,...
A gravitational-wave (GW) transient was identified in data recorded by the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) detectors on 2015 September 14. The event, initially designated G184098 and later given name GW150914, is described detail elsewhere. By prior arrangement, preliminary estimates of time, significance, sky location event were shared with 63 teams observers covering radio, optical, near-infrared, X-ray, gamma-ray wavelengths ground- space-based...
ABSTRACT A transient gravitational-wave signal, GW150914, was identified in the twin Advanced LIGO detectors on 2015 September at 09:50:45 UTC. To assess implications of this discovery, remained operation with unchanged configurations over a period 39 days around time signal. At detection statistic threshold corresponding to that observed for our search 16 simultaneous two-detector observational data is estimated have false-alarm rate (FAR) , yielding p -value GW150914 . Parameter estimation...
A wide variety of astrophysical and cosmological sources are expected to contribute a stochastic gravitational-wave background. Following the observations GW150914 GW151226, rate mass coalescing binary black holes appear be greater than many previous expectations. As result, background from unresolved compact coalescences is particularly loud. We perform search for isotropic using data Advanced LIGO's first observing run. The display no evidence signal. constrain dimensionless energy density...
We report on a search for gravitational waves from coalescing compact binaries using LIGO and Virgo observations between July 7, 2009 October 20, 2010. searched signals with total mass 2 25 solar masses; this includes binary neutron stars, black holes, consisting of hole star. The detectors were sensitive to systems up 40 Mpc distant further higher systems. No gravitational-wave detected. upper limits the rate coalescence as function mass, including results previous observations. cumulative...
Abstract We perform a statistical standard siren analysis of GW170817. Our does not utilize knowledge NGC 4993 as the unique host galaxy optical counterpart to Instead, we consider each within GW170817 localization region potential host; combining redshifts from all galaxies with distance estimate provides an Hubble constant, H 0 . Considering brighter than equally likely binary neutron star merger, find km s −1 Mpc (maximum posteriori and 68.3% highest density posterior interval; assuming...
We present the result of searches for gravitational waves from 200 pulsars using data first observing run Advanced LIGO detectors. find no significant evidence a gravitational-wave signal any these pulsars, but we are able to set most constraining upper limits yet on their amplitudes and ellipticities. For eight our give bounds that improvements over indirect spin-down limit values. another 32, within factor 10 limit, it is likely some will be reachable in future runs advanced detector....
ABSTRACT We report here the non-detection of gravitational waves from merger binary–neutron star systems and neutron star–black hole during first observing run Advanced Laser Interferometer Gravitational-wave Observatory (LIGO). In particular, we searched for gravitational-wave signals with component masses dimensionless spins <0.05. also same parameters, black mass , no restriction on spin magnitude. assess sensitivity two LIGO detectors to these find that they could have detected...
The recent announcement by LIGO of the detection gravitational-wave signal GW150914 has ignited tremendous interest. two manuscripts highlighted here detail impressive analysis performed to identify a specific black hole binary merger as source GW150914. papers describe independent methods analysis: matching numerical-relativity-generated templates and unmodeled burst analyses. together provide detailed virtually incontrovertible evidence, standards experimental physics, gravitational waves...
The Virgo detector has now finished its first science run; a mode duty cycle of more than 80% and 4.5 Mpc horizon distance for binary neutron star inspiral sources were achieved. Commissioning breaks organized during the run which permitted improvement sensitivity robustness interferometer against environmental perturbations like bad weather earthquakes. post-run commissioning phase started, with goal preparing next upgrade step detector, Virgo+.
We describe the present state and future evolution of Virgo gravitational wave detector, realized by Collaboration at European Gravitational Observatory, in Cascina near Pisa Italy. summarize basic principles operation design features detector. sensitivity due to a series intermediate upgrades called Virgo+ which is being completed this year includes new monolithic suspensions. scientific potential Finally we discuss plans for second generation Advanced Virgo, introducing its features,...