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- W4386552562 abstract "The merging of a binary system involving two neutron stars (NSs), or a black hole (BH) and a NS, often results in the emission of an electromagnetic (EM) transient. One component of this EM transient is the epic explosion known as a kilonova (KN). The characteristics of the KN emission can be used to probe the equation of state (EoS) of NS matter responsible for its formation. We predict KN light curves from computationally simulated BH-NS mergers, by using the 3D radiative transfer code texttt{POSSIS}. We investigate two EoSs spanning most of the allowed range of the mass-radius diagram. We also consider a soft EoS compatible with the observational data within the so-called 2-families scenario in which hadronic stars coexist with strange stars. Computed results show that the 2-families scenario, characterized by a soft EoS, should not produce a KN unless the mass of the binary components are small ($M_{rm BH} leq 6M_{odot}$, $M_{rm NS} leq 1.4M_{odot}$) and the BH is rapidly spinning ($chi_{rm BH} geq 0.3$). In contrast, a strong KN signal potentially observable from future surveys (e.g. VRO/LSST) is produced in the 1-family scenario for a wider region of the parameter space, and even for non-rotating BHs ($chi_{rm BH} = 0$) when $M_{rm BH} = 4M_{odot}$ and $M_{rm NS} = 1.2M_{odot}$. We also provide a fit that allows for the calculation of the unbound mass from the observed KN magnitude, without running timely and costly radiative transfer simulations. Findings presented in this paper will be used to interpret light curves anticipated during the fourth observing run (O4), of the advanced LIGO, advanced Virgo and KAGRA interferometers and thus to constrain the EoS of NS matter." @default.
- W4386552562 created "2023-09-09" @default.
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- W4386552562 date "2023-09-02" @default.
- W4386552562 modified "2023-09-27" @default.
- W4386552562 title "Black Hole - Neutron Star mergers: using kilonovae to constrain the equation of state" @default.
- W4386552562 doi "https://doi.org/10.48550/arxiv.2309.00890" @default.
- W4386552562 hasPublicationYear "2023" @default.
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