A5038614330- Pulsars and Gravitational Waves Research
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Dark Matter and Cosmic Phenomena
- Seismic Waves and Analysis
- Radio Astronomy Observations and Technology
- High-pressure geophysics and materials
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Astronomical Observations and Instrumentation
- Neutrino Physics Research
- Advanced Frequency and Time Standards
- Statistical and numerical algorithms
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
Syracuse University
2015-2024
The University of Adelaide
2017-2024
ARC Centre of Excellence for Gravitational Wave Discovery
2017-2023
PAREXEL International (United States)
2023
Q-State Biosciences (United States)
2022
Sorbonne Université
2012-2021
University of Birmingham
2013-2021
Université Paris Cité
2012-2021
Laboratoire de Physique Nucléaire et de Hautes Énergies
2012-2021
Centre National de la Recherche Scientifique
2012-2021
The Advanced LIGO gravitational wave detectors are second generation instruments designed and built for the two observatories in Hanford, WA Livingston, LA. identical design, specialized versions of a Michelson interferometer with 4 km long arms. As initial LIGO, Fabry-Perot cavities used arms to increase interaction time wave, power recycling is effective laser power. Signal has been added improve frequency response. In most sensitive region around 100 Hz, design strain sensitivity factor...
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...
The second-generation of gravitational-wave detectors are just starting operation, and have already yielding their first detections. Research is now concentrated on how to maximize the scientific potential astronomy. To support this effort, we present here design targets for a new generation detectors, which will be capable observing compact binary sources with high signal-to-noise ratio throughout Universe.
We present UV, optical, and NIR photometry of the first electromagnetic counterpart to a gravitational wave source from Advanced LIGO/Virgo, binary neutron star merger GW170817. Our data set extends discovery optical at $0.47$ days $18.5$ post-merger, includes observations with Dark Energy Camera (DECam), Gemini-South/FLAMINGOS-2 (GS/F2), {\it Hubble Space Telescope} ({\it HST}). The spectral energy distribution (SED) inferred this $0.6$ is well described by blackbody model $T\approx 8300$...
The goal of the Laser Interferometric Gravitational-Wave Observatory (LIGO) is to detect and study gravitational waves (GWs) astrophysical origin. Direct detection GWs holds promise testing general relativity in strong-field regime, providing a new probe exotic objects such as black holes neutron stars uncovering unanticipated astrophysics. LIGO, joint Caltech–MIT project supported by National Science Foundation, operates three multi-kilometer interferometers at two widely separated sites...
We use gravitational-wave observations of the binary neutron star merger GW170817 to explore tidal deformabilities and radii stars. perform a Bayesian parameter estimation with source location distance informed by electromagnetic observations. also assume that two stars have same equation state; we demonstrate that, for masses comparable component GW170817, this is effectively implemented assuming stars' dimensionless are determined binary's mass ratio q Λ_{1}/Λ_{2}=q^{6}. investigate...
Matched-filter searches for gravitational waves from coalescing compact binaries by the LIGO Scientific Collaboration use FINDCHIRP algorithm: an implementation of optimal filter with innovations to account unknown signal parameters and improve performance on detector data that has nonstationary non-Gaussian artifacts. We provide details algorithm as used in search subsolar mass binaries, binary neutron stars, star--black hole black holes.
We describe the PyCBC search for gravitational waves from compact-object binary coalescences in advanced gravitational-wave detector data. The was used first Advanced LIGO observing run and unambiguously identified two black hole mergers, GW150914 GW151226. At its core, performs a matched-filter merger signals using bank of template waveforms. provide complete description pipeline including steps to mitigate effects noise transients data, identify candidate events measure their statistical...
This white paper describes the research and development needed over next decade to realize "Cosmic Explorer," U.S. node of a future third-generation detector network that will be capable observing characterizing compact gravitational-wave sources cosmological redshifts.
Abstract We present the Dark Energy Camera (DECam) discovery of optical counterpart first binary neutron star merger detected through gravitational-wave emission, GW170817. Our observations commenced 10.5 hr post-merger, as soon localization region became accessible from Chile. imaged 70 deg 2 in i and z bands, covering 93% initial integrated probability, to a depth necessary identify likely counterparts (e.g., kilonova). At 11.4 post-merger we bright transient located nucleus NGC 4993 at...
The Laser Interferometer Gravitational Wave Observatory (LIGO) consists of two widely separated 4 km laser interferometers designed to detect gravitational waves from distant astrophysical sources in the frequency range 10 Hz kHz. first observation run Advanced LIGO detectors started September 2015 and ended January 2016. A strain sensitivity better than $10^{-23}/\sqrt{\text{Hz}}$ was achieved around 100 Hz. Understanding both fundamental technical noise critical for increasing observable...
We report the discovery of rising X-ray emission from binary neutron star (BNS) merger event GW170817. This is first detection a gravitational-wave source. Observations acquired with Chandra Observatory (CXO) at t~2.3 days post reveal no significant emission, L_x<=3.2x10^38 erg/s (isotropic-equivalent). Continued monitoring revealed presence an source that brightened time, reaching L_x\sim 9x10^39 ~15.1 merger. interpret these findings in context isotropic and collimated relativistic...
Numerical simulations of 15 orbits an equal-mass binary black hole system are presented. Gravitational waveforms from these simulations, covering more than 30 cycles and ending about 1.5 before merger, compared with those quasi-circular zero-spin post-Newtonian (PN) formulae. The cumulative phase uncertainty comparisons is 0.05 radians, dominated by effects arising the small residual spins holes orbital eccentricity in simulations. Matching numerical results to PN early run yields excellent...
We present Very Large Array (VLA) and Atacama Millimeter/sub-millimeter ALMA radio observations of GW\,170817, the first Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo gravitational wave (GW) event from a binary neutron star merger GW with an electromagnetic (EM) counterpart. Our data include following discovery optical transient at both centimeter ($13.7$ hours post merger) millimeter ($2.41$ days bands. detect faint emission 6 GHz 19.47 39.23 after merger, but not in...
We report observation of the electroweak production single top quarks in $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ based on $2.3\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data collected by D0 detector Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from fragmentation $b$ quarks, we measure a cross section...
Model waveforms are used in gravitational wave data analysis to detect and then measure the properties of a source by matching model signal from detector. This paper derives accuracy standards for which sufficient ensure that these applications capable extracting full scientific content data, but without demanding excessive would place undue burdens on waveform simulation community. These intended primarily broadband produced numerical simulations, quite general apply equally such analytical...
All ten LIGO/Virgo binary black hole (BH-BH) coalescences reported following the O1/O2 runs have near-zero effective spins. There are only three potential explanations for this. If BH spin magnitudes large, then: (i) either both vectors must be nearly in orbital plane or (ii) angular momenta of BHs oppositely directed and similar magnitude. Then there is also possibility that (iii) small. We consider third hypothesis within framework classical isolated evolution scenario BH-BH merger...
We present a near-infrared spectral sequence of the electromagnetic counterpart to binary neutron star merger GW170817 detected by Advanced LIGO/Virgo. Our dataset comprises seven epochs J+H spectra taken with FLAMINGOS-2 on Gemini-South between 1.5 and 10.5 days after merger. In initial epoch, spectrum is dominated smooth blue continuum due high-velocity, lanthanide-poor kilonova component. Starting following night, all subsequent instead show features that are similar those predicted in...
We report on a measurement of the inclusive jet cross section in pp[over ] collisions at center-of-mass energy sqrt[s]=1.96 TeV using data collected by D0 experiment Fermilab Tevatron Collider corresponding to an integrated luminosity 0.70 fb;{-1}. The cover transverse momenta from 50 600 GeV and rapidities range -2.4 2.4. Detailed studies correlations between systematic uncertainties momentum rapidity are presented, measurements found be good agreement with next-to-leading order QCD calculations.
We present a measurement of forward-backward asymmetry in top quark-antiquark production proton-antiproton collisions the final state containing lepton and at least four jets. Using dataset corresponding to an integrated luminosity $5.4\,\mathrm {fb}^{-1}$, collected by \DZ\ experiment Fermilab Tevatron Collider, we measure \ttbar\ be $(9.2 \pm 3.7)$% reconstruction level. When corrected for detector acceptance resolution, is found $(19.6 6.5)$%. also based on from quark decay, $(15.2...
We combine searches by the CDF and D0 Collaborations for associated production of a Higgs boson with $W$ or $Z$ subsequent decay to bottom-antibottom quark pair. The data, originating from Fermilab Tevatron $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$, correspond integrated luminosities up $9.7\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. are conducted mass in range $100--150\text{ }\mathrm{GeV}/{c}^{2}$. observe an excess events data compared background predictions,...