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Evidence for mass-dependent spin subpopulations in GWTC-4
Asad Hussain, Maximiliano Isi, Aaron Zimmerman
While the origin of merging black-hole binaries observed in gravitational waves remain uncertain, different formation channels are expected to leave distinct imprints on their obse…
Spinning into the Gap: Direct-Horizon Collapse as the Origin of GW231123 from End-to-End GRMHD Simulations
Ore Gottlieb, Brian D. Metzger, Danat Issa +3
GW231123, the most massive binary black hole (BH) merger observed to date, involves component BHs with masses inside the pair-instability mass gap and unusually high spins. This ch…
Identifying Compact Chirping SMBHBs in LSST using Bayesian Analysis
Chengcheng Xin, Maximiliano Isi, Will M. Farr +1
The Legacy Survey of Space and Time (LSST) is expected to observe up to million quasars in the next decade. In this work, we show that it is possible to use such data t…
Hints of spin-magnitude correlations and a rapidly spinning subpopulation of binary black holes
Asad Hussain, Maximiliano Isi, Aaron Zimmerman
The complex astrophysical processes leading to the formation of binary black holes and their eventual merger are imprinted on the spins of the individual black holes. We revisit th…
Physical Models for the Astrophysical Population of Black Holes: Application to the Bump in the Mass Distribution of Gravitational Wave Sources
Jacob Golomb, Maximiliano Isi, Will Farr
Gravitational wave observations of binary black holes have revealed unexpected structure in the black hole mass distribution. Previous studies of the mass distribution employ physi…
Comment on "Analysis of Ringdown Overtones in GW150914''
Maximiliano Isi, Will M. Farr
Cotesta et al. (2022) reanalyze the GW150914 ringdown, arguing against the presence of an overtone and suggesting claims of its detection in Isi et al. (2019) were driven by noise.…
GW190521: tracing imprints of spin-precession on the most massive black hole binary
Simona J. Miller, Maximiliano Isi, Katerina Chatziioannou +2
GW190521 is a remarkable gravitational-wave signal on multiple fronts: its source is the most massive black hole binary identified to date and could have spins misaligned with its…
Evidence of large recoil velocity from a black hole merger signal
Vijay Varma, Sylvia Biscoveanu, Tousif Islam +6
The final black hole left behind after a binary black hole merger can attain a recoil velocity, or a "kick", reaching values up to 5000 km/s. This phenomenon has important implicat…
Hints of spin-orbit resonances in the binary black hole population
Vijay Varma, Sylvia Biscoveanu, Maximiliano Isi +2
Binary black hole spin measurements from gravitational wave observations can reveal the binary's evolutionary history. In particular, the spin orientations of the component black h…
Measuring binary black hole orbital-plane spin orientations
Vijay Varma, Maximiliano Isi, Sylvia Biscoveanu +2
Binary black hole spins are among the key observables for gravitational wave astronomy. Among the spin parameters, their orientations within the orbital plane, , and $Δϕ…
Recent LIGO-Virgo discoveries
Maximiliano Isi
The LIGO and Virgo gravitational-wave detectors carried out the first half of their third observing run from April through October 2019. During this period, they detected 39 new si…
Probing the Nature of Black Holes: Deep in the mHz Gravitational-Wave Sky
Vishal Baibhav, Leor Barack, Emanuele Berti +26
Black holes are unique among astrophysical sources: they are the simplest macroscopic objects in the Universe, and they are extraordinary in terms of their ability to convert energ…
Search for transient gravitational wave signals associated with magnetar bursts during Advanced LIGO's second observing run
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1129
We present the results of a search for short and intermediate-duration gravitational-wave signals from four magnetar bursts in Advanced LIGO's second observing run. We find no evid…
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015-2017 LIGO Data
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1149
We present a search for gravitational waves from 221 pulsars with rotation frequencies Hz. We use advanced LIGO data from its first and second observing runs spanning…
Low-Latency Gravitational Wave Alerts for Multi-Messenger Astronomy During the Second Advanced LIGO and Virgo Observing Run
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1135
Advanced LIGO's second observing run (O2), conducted from November 30, 2016 to August 25, 2017, combined with Advanced Virgo's first observations in August 2017 witnessed the birth…
Searches for Continuous Gravitational Waves from Fifteen Supernova Remnants and Fomalhaut b with Advanced LIGO
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1129
We describe directed searches for continuous gravitational waves from sixteen well localized candidate neutron stars assuming none of the stars has a binary companion. The searches…
Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1138
We present results on the mass, spin, and redshift distributions with phenomenological population models using the ten binary black hole mergers detected in the first and second ob…
GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1148
We present the results from three gravitational-wave searches for coalescing compact binaries with component masses above 1 during the first and second observing…
Constraining the p-mode--g-mode tidal instability with GW170817
The LIGO Scientific Collaboration, The Virgo Collaboration, B. P. Abbott +1136
We analyze the impact of a proposed tidal instability coupling -modes and -modes within neutron stars on GW170817. This non-resonant instability transfers energy from the orb…
On the Progenitor of Binary Neutron Star Merger GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1095
On 2017 August 17 the merger of two compact objects with masses consistent with two neutron stars was discovered through gravitational-wave (GW170817), gamma-ray (GRB 170817A), and…
Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
LIGO Scientific Collaboration, Virgo Collaboration, Fermi Gamma-Ray Burst Monitor +1
On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB 170817A was observed independently…
Search for post-merger gravitational waves from the remnant of the binary neutron star merger GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1105
The first observation of a binary neutron star coalescence by the Advanced LIGO and Advanced Virgo gravitational-wave detectors offers an unprecedented opportunity to study matter…
Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1100
The source of the gravitational-wave signal GW170817, very likely a binary neutron star merger, was also observed electromagnetically, providing the first multi-messenger observati…
Upper Limits on Gravitational Waves from Scorpius X-1 from a Model-Based Cross-Correlation Search in Advanced LIGO Data
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1046
We present the results of a semicoherent search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1, using data from the first Advanced LIGO observing ru…