2021
DOI: 10.48550/arxiv.2110.09604
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Black hole-neutron star mergers are unlikely multi-messenger sources

Giacomo Fragione

Abstract: The promise by the LIGO/Virgo/Kagra (LVK) collaboration to detect black hole-neutron star (BH-NS) mergers via gravitational wave (GW) emission has recently been fulfilled with the detection of GW200105 and GW200115. Mergers of BH-NS binaries are particularly exciting for their multi-messenger potential, since the GW detection can be followed by an electromagnetic (EM) counterpart (kilonova, gamma-ray burst, afterglow) that can reveal important information on the equation of state (EOS) of NSs and the nature of… Show more

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Cited by 4 publications
(8 citation statements)
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“…For example, studies including Zevin et al (2017), Bouffanais et al (2019), Franciolini et al (2021, Ng et al (2021) and Zevin et al (2021) aim to determine the contributions of different formation channels to the observed BHBH population. Further examples include Fragione (2021), which estimates the number of BHNS mergers with an electromagnetic counterpart. Our work shows that uncertainties in both stellar and binary evolution and S(𝑍, 𝑧) modelling can drastically impact the rate and distribution shapes of the BHBH, BHNS and NSNS populations, challenging the ability to draw strong conclusions when only considering a few population synthesis models at this stage.…”
Section: A Realistic View Of Population Synthesis Modelsmentioning
confidence: 99%
“…For example, studies including Zevin et al (2017), Bouffanais et al (2019), Franciolini et al (2021, Ng et al (2021) and Zevin et al (2021) aim to determine the contributions of different formation channels to the observed BHBH population. Further examples include Fragione (2021), which estimates the number of BHNS mergers with an electromagnetic counterpart. Our work shows that uncertainties in both stellar and binary evolution and S(𝑍, 𝑧) modelling can drastically impact the rate and distribution shapes of the BHBH, BHNS and NSNS populations, challenging the ability to draw strong conclusions when only considering a few population synthesis models at this stage.…”
Section: A Realistic View Of Population Synthesis Modelsmentioning
confidence: 99%
“…However, disruption occurs only for a small region of BHNS parameter space, when the BH is highly spinning and small, 5 βˆ’ 10M (see Foucart et al 2018, and Β§3.1 below). Furthermore, given the LVK population of compact object mergers discovered so far, it is likely that most BHNS mergers will not disrupt the NS (Fragione 2021).…”
Section: Introductionmentioning
confidence: 99%
“…The fraction of systems where tidal disruption occurs is still uncertain as it depends on unknown distributions of the binary mass ratio, NS compactness, and BH spin. Still, this fraction is assumed to be small (Zappa et al 2019;Fragione 2021). For example, while BHNS mergers with large aligned BH spins produce the most ejecta mass, high spins do not seem to be consistent with current GW detections (Abbott et al 2021b).…”
Section: Introductionmentioning
confidence: 90%