On the origin of GW190425

@article{RomeroShaw2020OnTO,
  title={On the origin of GW190425},
  author={Isobel M. Romero-Shaw and Nicholas Farrow and Simon Stevenson and Eric Thrane and Xing-Jiang Zhu},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020},
  volume={496}
}
The LIGO/Virgo collaborations recently announced the detection of a likely binary neutron star merger, GW190425. The total mass of GW190425 is significantly larger than the masses of Galactic double neutron stars known through radio astronomy. This suggests that GW190425 formed differently from Galactic double neutron stars. We hypothesize that GW190425 formed via unstable "case BB" mass transfer. According to this hypothesis, the progenitor of GW190425 was a binary consisting of a neutron star… 

Figures from this paper

Measuring the eccentricity of GW170817 and GW190425
Two binary neutron star mergers, GW170817 and GW190425, have been detected by Advanced LIGO and Virgo. These signals were detected by matched-filter searches that assume the star's orbit has
The heavier the better: how to constrain mass ratios and spins of high-mass neutron star mergers
The first binary neutron star merger event, GW170817, and its bright electromagnetic counterpart have provided a remarkable amount of information. By contrast, the second event, GW190425, with
Updated parameter estimates for GW190425 using astrophysical arguments and implications for the electromagnetic counterpart
The progenitor system of the compact binary merger GW190425 had a total mass of $3.4^{+0.3}_{-0.1}$ M⊙ (90th-percentile confidence region) as measured from its gravitational wave signal. This mass
Characterizing Astrophysical Binary Neutron Stars with Gravitational Waves
Merging binary neutron stars are thought to be formed predominantly via isolated binary evolution. In this standard formation scenario, the first-born neutron star goes through a recycling process
GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo during the First Half of the Third Observing Run
We report on gravitational wave discoveries from compact binary coalescences detected by Advanced LIGO and Advanced Virgo between 1 April 2019 15:00 UTC and 1 October 2019 15:00. By imposing a
Does GW190425 Require an Alternative Formation Pathway than a Fast-merging Channel?
The LIGO/Virgo Scientific Collaboration (LVC) recently announced the detection of a compact object binary merger, GW190425, with a total mass of M⊙ and individual component masses in the range of
Exploring the Lower Mass Gap and Unequal Mass Regime in Compact Binary Evolution
On 2019 August 14, the LIGO and Virgo detectors observed GW190814, a gravitational-wave signal originating from the merger of a black hole (BH) with a compact object. GW190814's compact-binary source
Binary population synthesis with probabilistic remnant mass and kick prescriptions
We report on the impact of a probabilistic prescription for compact remnant masses and kicks on massive binary population synthesis. We find that this prescription populates the putative mass gap
Masses of double neutron star mergers
Aims. The mass discrepancy between the observed population of double neutron star binaries by radio pulsar observations and gravitational-wave observation requires an explanation. Methods. Binary
Be X-ray binaries in the SMC as indicators of mass-transfer efficiency
Be X-ray binaries (BeXRBs) consist of rapidly rotating Be stars with neutron star companions accreting from the circumstellar emission disk. We compare the observed population of BeXRBs in the Small
...
...

References

SHOWING 1-10 OF 87 REFERENCES
Evidence for dynamically driven formation of the GW170817 neutron star binary in NGC 4993
We present a study of NGC 4993, the host galaxy of the GW170817 gravitational-wave event, the GRB 170817A short gamma-ray burst (sGRB), and the AT 2017gfo kilonova. We use Dark Energy Camera imaging,
The origin of the first neutron star – neutron star merger
The first neutron star-neutron star (NS-NS) merger was discovered on August 17, 2017 through gravitational waves (GW170817) and followed with electromagnetic observations. This merger was detected in
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral.
TLDR
The association of GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short γ-ray bursts.
Search for Eccentric Binary Neutron Star Mergers in the First and Second Observing Runs of Advanced LIGO
We present a search for gravitational waves from merging binary neutron stars (BNSs) which have non-negligible eccentricity as they enter the Laser Interferometer Gravitational Wave Observatory
Does GW190425 Require an Alternative Formation Pathway than a Fast-merging Channel?
The LIGO/Virgo Scientific Collaboration (LVC) recently announced the detection of a compact object binary merger, GW190425, with a total mass of M⊙ and individual component masses in the range of
On the formation history of Galactic double neutron stars
Double neutron stars (DNSs) have been observed as Galactic radio pulsars, and the recent discovery of gravitational waves from the DNS merger GW170817 adds to the known DNS population. We perform
Inferring the population properties of binary neutron stars with gravitational-wave measurements of spin
The recent LIGO-Virgo detection of gravitational waves from a binary neutron star inspiral event GW170817 and the discovery of its accompanying electromagnetic signals mark a new era for
Merger Sites of Double Neutron Stars and Their Host Galaxies
Using the StarTrack population synthesis code, we analyze the formation channels possibly available to double neutron star binaries and find that they can be richer than previously thought. We
Formation of double neutron star systems as implied by observations
Double Neutron Stars (DNS) have to survive two supernovae and still remain bound. This sets strong limits on the nature of the second collapse in these systems. We consider the masses and orbital
On the Rate of Neutron Star Binary Mergers from Globular Clusters
The first detection of gravitational waves from a neutron star–neutron star (NS–NS) merger, GW170817, and the increasing number of observations of short gamma-ray bursts have greatly motivated
...
...