Results 61 to 70 of about 3,576 (162)

A Search for Low-mass Neutron Stars in the Third Observing Run of Advanced LIGO and Virgo

open access: yesThe Astrophysical Journal
Most observed neutron stars have masses around 1.4 M _⊙ , consistent with current formation mechanisms. To date, no subsolar-mass neutron star has been observed.
Keisi Kacanja, Alexander H. Nitz
doaj   +1 more source

Gravitational-wave Dark Siren Cosmology Systematics from Galaxy Weighting

open access: yesThe Astrophysical Journal
The detection of GW170817 and the measurement of its redshift from the associated electromagnetic counterpart provided the first gravitational-wave (GW) determination of the Hubble constant ( H _0 ), demonstrating the potential power of standard siren ...
Alexandra G. Hanselman   +3 more
doaj   +1 more source

Probing the Peak of Star Formation with the Stochastic Background of Binary Black Hole Mergers

open access: yesThe Astrophysical Journal
Although the LIGO–Virgo–KAGRA collaboration detects many individually resolvable gravitational-wave events from binary black hole mergers, those that are too weak to be identified individually contribute to the stochastic gravitational-wave background ...
Nico Bers, Sylvia Biscoveanu
doaj   +1 more source

GECKO Follow-up Observations of the Binary Neutron Star–Black Hole Merger Candidate S230518h

open access: yesThe Astrophysical Journal
The gravitational-wave (GW) event S230518h is a potential binary neutron star–black hole merger (NSBH) event that was detected during engineering run 15, which served as the commissioning period before the LIGO–Virgo–KAGRA O4a observing run.
Gregory S. H. Paek   +14 more
doaj   +1 more source

Precision cosmology from future lensed gravitational wave and electromagnetic signals

open access: yesNature Communications, 2017
Gravitational wave sources can be used as cosmological probes through a direct distance luminosity relation. Here, the authors demonstrate that the time delay between lensed gravitational wave signals and their electromagnetic counterparts can reduce the
Kai Liao   +4 more
doaj   +1 more source

Gravitational waves and astrophysical sources

open access: yesComptes Rendus. Physique, 2013
In linear approximation to general relativity, gravitational waves can be thought of as perturbation of the background metric that propagate at the speed of light. A time-varying quadrupole of matter distribution causes the emission of gravitational waves.
openaire   +1 more source

The Detection Prospect of the Counter Jet Radiation in the Late Afterglow of GRB 170817A

open access: yesThe Astrophysical Journal
The central engine of a gamma-ray burst (GRB) is widely believed to launch a pair of oppositely moving jets, i.e., the forward jet moving toward us and the counter jet regressing away.
Jia-Ning Li   +5 more
doaj   +1 more source

Explaining the GWSkyNet-Multi Machine Learning Classifier Predictions for Gravitational-wave Events

open access: yesThe Astrophysical Journal
GWSkyNet-Multi is a machine learning model developed for the classification of candidate gravitational-wave events detected by the LIGO and Virgo observatories.
Nayyer Raza   +7 more
doaj   +1 more source

Examining the Gap in the Chirp Mass Distribution of Binary Black Holes

open access: yesThe Astrophysical Journal
The mass distribution of binary black holes inferred from gravitational-wave measurements is expected to shed light on their formation mechanisms. An emerging structure in the mass distribution indicates the presence of multiple peaks around chirp masses
Vaibhav Tiwari
doaj   +1 more source

New sources of gravitational waves during inflation

open access: yesJournal of Cosmology and Astroparticle Physics, 2014
32 pages, 1 figure.
Senatore, Leonardo   +2 more
openaire   +2 more sources

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