A5084392674- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- High-pressure geophysics and materials
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Building Energy and Comfort Optimization
- Mechanical and Optical Resonators
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Seismic Waves and Analysis
- Wind and Air Flow Studies
- Statistical and numerical algorithms
- Magnetic confinement fusion research
- Urban Heat Island Mitigation
- Acoustic Wave Resonator Technologies
- Sustainable Building Design and Assessment
- Advanced Fiber Optic Sensors
- Superconducting Materials and Applications
- Solar Energy Systems and Technologies
- Dark Matter and Cosmic Phenomena
National Institute for Subatomic Physics
2022-2025
Maastricht University
2022-2025
Centre National de la Recherche Scientifique
2017-2024
Université Claude Bernard Lyon 1
2019-2024
Institut Lumière Matière
2019-2024
Laboratoire des Matériaux Avancés
2017-2021
Institute of Nuclear Physics of Lyon
2020-2021
Institut de Physique des 2 Infinis de Lyon
2020-2021
Teem Photonics (France)
2021
Institut National de Physique Nucléaire et de Physique des Particules
2018-2020
On August 17, 2017 at 12∶41:04 UTC the Advanced LIGO and Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with combined signal-to-noise ratio 32.4 false-alarm-rate estimate less than one per 8.0×10^{4} years. We infer component masses to be between 0.86 2.26 M_{⊙}, in agreement known stars. Restricting spins range inferred stars, we find 1.17-1.60 total mass system 2.74_{-0.01}^{+0.04}M_{⊙}. source localized...
We present the results from three gravitational-wave searches for coalescing compact binaries with component masses above <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:msub><a:mrow><a:mi>M</a:mi></a:mrow><a:mrow><a:mo stretchy="false">⊙</a:mo></a:mrow></a:msub></a:mrow></a:math> during first and second observing runs of advanced detector network. During run (<d:math...
On 2017 August 17, the gravitational-wave event GW170817 was observed by Advanced LIGO and Virgo detectors, gamma-ray burst (GRB) GRB 170817A independently Fermi Gamma-ray Burst Monitor, Anticoincidence Shield for Spectrometer International Gamma-Ray Astrophysics Laboratory. The probability of near-simultaneous temporal spatial observation occurring chance is $5.0\times 10^{-8}$. We therefore confirm binary neutron star mergers as a progenitor short GRBs. association provides new insight...
We describe the observation of GW170104, a gravitational-wave signal produced by coalescence pair stellar-mass black holes. The was measured on January 4, 2017 at 10∶11:58.6 UTC twin advanced detectors Laser Interferometer Gravitational-Wave Observatory during their second observing run, with network signal-to-noise ratio 13 and false alarm rate less than 1 in 70 000 years. inferred component hole masses are 31.2_{-6.0}^{+8.4}M_{⊙} 19.4_{-5.9}^{+5.3}M_{⊙} (at 90% credible level). spins best...
On 17 August 2017, the LIGO and Virgo observatories made first direct detection of gravitational waves from coalescence a neutron star binary system. The this gravitational-wave signal, GW170817, offers novel opportunity to directly probe properties matter at extreme conditions found in interior these stars. initial, minimal-assumption analysis data placed constraints on tidal effects coalescing bodies, which were then translated radii. Here, we expand upon previous analyses by working under...
On August 14, 2017 at 10∶30:43 UTC, the Advanced Virgo detector and two LIGO detectors coherently observed a transient gravitational-wave signal produced by coalescence of stellar mass black holes, with false-alarm rate ≲1 in 27 000 years. The was three-detector network matched-filter signal-to-noise ratio 18. inferred masses initial holes are 30.5_{-3.0}^{+5.7}M_{⊙} 25.3_{-4.2}^{+2.8}M_{⊙} (at 90% credible level). luminosity distance source is 540_{-210}^{+130} Mpc, corresponding to...
On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected gamma-ray burst (GRB 170817A) delay of $\sim$1.7 s respect to time. From gravitational-wave signal, source initially localized sky region 31 deg$^2$ at luminosity distance $40^{+8}_{-8}$ Mpc component masses consistent stars. were later...
On June 8, 2017 at 02:01:16.49 UTC, a gravitational-wave signal from the merger of two stellar-mass black holes was observed by Advanced LIGO detectors with network signal-to-noise ratio 13. This system is lightest hole binary so far observed, component masses $12^{+7}_{-2}\,M_\odot$ and $7^{+2}_{-2}\,M_\odot$ (90% credible intervals). These lie in range measured low-mass X-ray binaries, thus allowing us to compare detected through gravitational waves electromagnetic observations. The...
On August 17, 2017, the Advanced LIGO and Virgo gravitational-wave detectors observed a low-mass compact binary inspiral. The initial sky localization of source signal, GW170817, allowed electromagnetic observatories to identify NGC 4993 as host galaxy. In this work, we improve estimates binary's properties, including component masses, spins, tidal parameters, using known location, improved modeling, recalibrated data. We extend range frequencies considered down 23 Hz, compared 30 Hz in...
On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Virgo observed a short duration gravitational-wave signal, GW190521, with three-detector network signal-to-noise ratio of 14.7, an estimated false-alarm rate 1 in 4900 yr using search sensitive to generic transients. If GW190521 is from quasicircular binary inspiral, then the detected signal consistent merger two black holes masses 85_{-14}^{+21} M_{⊙} 66_{-18}^{+17} (90% credible intervals). We infer that primary hole mass lies within gap...
The third Gravitational-Wave Transient Catalog (GWTC-3) describes signals detected with Advanced LIGO and Virgo up to the end of their observing run. Updating previous GWTC-2.1, we present candidate gravitational waves from compact binary coalescences during second half run (O3b) between 1 November 2019, 15:00 UTC 27 March 2020, 17:00 UTC. There are 35 coalescence candidates identified by at least one our search algorithms a probability astrophysical origin $p_\mathrm{astro} > 0.5$. Of...
We present results on the mass, spin, and redshift distributions with phenomenological population models using ten binary black hole mergers detected in first second observing runs completed by Advanced LIGO Virgo. constrain properties of (BBH) mass spectrum a range parameterizations BBH spin distributions. find that distribution more massive such binaries is well approximated no than 1% holes $45\,M_\odot$, power law index $\alpha = {1.3}^{+1.4}_{-1.7}$ (90% credibility). also show BBHs are...
We report on the population of 47 compact binary mergers detected with a false-alarm rate 1/yr in second LIGO--Virgo Gravitational-Wave Transient Catalog, GWTC-2. observe several characteristics merging black hole (BBH) not discernible until now. First, we find that primary mass spectrum contains structure beyond power-law sharp high-mass cut-off; it is more consistent broken power law break at $39.7^{+20.3}_{-9.1}\,M_\odot$, or Gaussian feature peaking $33.1^{+4.0}_{-5.6}\,M_\odot$ (90\%...
The detection of gravitational waves by Advanced LIGO and Virgo provides an opportunity to test general relativity in a regime that is inaccessible traditional astronomical observations laboratory tests. We present four tests the consistency data with binary black hole waveforms predicted relativity. One subtracts best-fit waveform from checks residual detector noise. second low- high-frequency parts observed signals. third phenomenological deviations introduced model (including...
We report the observation of gravitational waves from two compact binary coalescences in LIGO's and Virgo's third observing run with properties consistent neutron star-black hole (NSBH) binaries. The events are named GW200105_162426 GW200115_042309, abbreviated as GW200105 GW200115; first was observed by LIGO Livingston Virgo, second all three LIGO-Virgo detectors. source has component masses $8.9^{+1.2}_{-1.5}\,M_\odot$ $1.9^{+0.3}_{-0.2}\,M_\odot$, whereas GW200115...
Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate consistency data with predictions from theory. We first establish that residuals best-fit waveform are consistent detector noise, low- high-frequency parts signals agreement. then consider parametrized modifications varying post-Newtonian phenomenological coefficients, improving past constraints factors ${\sim}2$; also...
We report on the population properties of compact binary mergers inferred from gravitational-wave observations these systems during first three LIGO-Virgo observing runs. The Gravitational-Wave Transient Catalog 3 (GWTC-3) contains signals consistent with classes mergers: black hole, neutron star, and star–black hole mergers. infer star merger rate to be between 10 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1700</a:mn><a:mtext> </a:mtext><a:mtext>...
On 2019 April 25, the LIGO Livingston detector observed a compact binary coalescence with signal-to-noise ratio 12.9. The Virgo was also taking data that did not contribute to detection due low ratio, but were used for subsequent parameter estimation. 90% credible intervals component masses range from 1.12 2.52 $M_{\odot}$ (1.45 1.88 if we restrict dimensionless spin magnitudes be smaller than 0.05). These mass parameters are consistent individual components being neutron stars. However,...
We report on gravitational wave discoveries from compact binary coalescences detected by Advanced LIGO and Virgo in the first half of third observing run (O3a) between 1 April 2019 15:00 UTC October 15:00. By imposing a false-alarm-rate threshold two per year each four search pipelines that constitute our search, we present 39 candidate events. At this threshold, expect contamination fraction less than 10%. Of these, 26 events were reported previously near real-time through GCN Notices...
We report the observation of gravitational waves from a binary-black-hole coalescence during first two weeks LIGO's and Virgo's third observing run. The signal was recorded on April 12, 2019 at 05:30:44 UTC with network signal-to-noise ratio 19. binary is different observations runs most notably due to its asymmetric masses: ~30 solar mass black hole merged ~8 companion. more massive rotated dimensionless spin magnitude between 0.22 0.60 (90% probability). Asymmetric systems are predicted...
Abstract We report the observation of a compact binary coalescence involving 22.2–24.3 M ⊙ black hole and object with mass 2.50–2.67 (all measurements quoted at 90% credible level). The gravitational-wave signal, GW190814, was observed during LIGO’s Virgo’s third observing run on 2019 August 14 21:10:39 UTC has signal-to-noise ratio 25 in three-detector network. source localized to 18.5 deg 2 distance Mpc; no electromagnetic counterpart been confirmed date. most unequal yet measured...
The recent discovery by Advanced LIGO and Virgo of a gravitational wave signal from binary neutron star inspiral has enabled tests general relativity (GR) with this new type source. This source, for the first time, permits strong-field dynamics compact binaries in presence matter. In Letter, we place constraints on dipole radiation possible deviations GR post-Newtonian coefficients that govern regime. Bounds modified dispersion waves are obtained; combination information observed...
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...