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Binary neutron star mergers are strong gravitational wave (GW) sources and the leading candidates to interpret short duration gamma-ray bursts (SGRBs). Under the assumptions that SGRBs are produced by double neutron star mergers and that…

High Energy Astrophysical Phenomena · Physics 2016-08-06 He Gao , Bing Zhang , Hou-Jun Lü

After decades of observations the physical mechanisms that generate short gamma-ray bursts (SGRBs) still remain unclear. Observational evidence provides support to the idea that SGRBs originate from the merger of compact binaries,…

High Energy Astrophysical Phenomena · Physics 2015-05-07 Riccardo Ciolfi , Daniel M. Siegel

Recent observations of short gamma-ray bursts (SGRBs) suggest that binary neutron star (NS) mergers can create highly magnetised, millisecond NSs. Sharp cut-offs in X-ray afterglow plateaus of some SGRBs hint at the gravitational collapse…

High Energy Astrophysical Phenomena · Physics 2014-04-11 Vikram Ravi , Paul D. Lasky

Short gamma-ray bursts (SGRBs) are among the most luminous explosions in the Universe and their origin still remains uncertain. Observational evidence favors the association with binary neutron star or neutron star-black hole (NS-BH) binary…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Riccardo Ciolfi , Daniel M. Siegel

One of the most surprising gamma-ray burst (GRB) features discovered with the Swift-X ray telescope (XRT) is a plateau phase in the early X-ray afterglow light curves. These plateaus are observed in the majority of long GRBs, while their…

High Energy Astrophysical Phenomena · Physics 2025-01-09 Luca Guglielmi , Giulia Stratta , Simone Dall'Osso , Paramvir Singh , Marcella Brusa , Rosalba Perna

Short Gamma-Ray Bursts (GRBs) are explosions of cosmic origin believed to be associated with the merger of two compact objects, either two neutron stars, or a neutron star and a black hole. The presence of at least one neutron star has long…

High Energy Astrophysical Phenomena · Physics 2016-04-27 Rosalba Perna , Davide Lazzati , Bruno Giacomazzo

The collapsar model was proposed to explain the long-duration gamma-ray bursts (GRBs), while the short GRBs are associated with the mergers of compact objects. In the first case, mainly the energetics of the events is consistent with the…

High Energy Astrophysical Phenomena · Physics 2018-05-10 Agnieszka Janiuk , Kostas Sapountzis

Short gamma-ray bursts (SGRBs) are thought to be primarily associated with binary neutron star (BNS) mergers. The SGRB population can therefore be scrutinized to look for signatures of the delay time between the formation of the progenitor…

High Energy Astrophysical Phenomena · Physics 2026-01-08 Matteo Pracchia , Om Sharan Salafia

Short gamma-ray bursts (sGRBs) are generally thought to result from the merger of two neutron stars or the merger of a neutron star with a black hole. It is becoming standard practise to model these mergers with hydrodynamical simulations…

High Energy Astrophysical Phenomena · Physics 2020-09-09 C. J. Nixon , E. R. Coughlin , J. E. Pringle

The accretion of ~ 0.1 -- 1 M_o of material by a neutron star through Roche lobe overflow of its companion or through white-dwarf/neutron-star coalescence in a low mass binary system could be enough to exceed the critical mass of a neutron…

Astrophysics · Physics 2009-11-11 Charles D. Dermer , Armen Atoyan

There is mounting evidence for the binary nature of the progenitors of gamma-ray bursts (GRBs). For a long GRB, the induced gravitational collapse (IGC) paradigm proposes as progenitor, or "in-state", a tight binary system composed of a…

High Energy Astrophysical Phenomena · Physics 2016-11-24 R. Ruffini , J. A. Rueda , M. Muccino , Y. Aimuratov , L. M. Becerra , C. L. Bianco , M. Kovacevic , R. Moradi , F. G. Oliveira , G. B. Pisani , Y. Wang

The joint observation of GW170817 and GRB170817A proved that binary neutron star (BNS) mergers are progenitors of short Gamma-ray Bursts (SGRB): this established a direct link between the still unsettled SGRB central engine and the outcome…

High Energy Astrophysical Phenomena · Physics 2020-09-30 Barbara Patricelli , Maria Grazia Bernardini

Binary neutron star (BNS) mergers are the leading model to explain the phenomenology of short gamma-ray bursts (SGRBs), which are among the most luminous explosions in the universe. Recent observations of long-lasting X-ray afterglows of…

High Energy Astrophysical Phenomena · Physics 2016-03-16 Daniel M. Siegel , Riccardo Ciolfi

The binary neutron star merger GW170817/GRB170817A confirmed that at least some neutron star mergers are the progenitors of short gamma-ray bursts. Many short gamma-ray bursts have long-term x-ray afterglows that have been interpreted in…

High Energy Astrophysical Phenomena · Physics 2019-09-04 Paul D. Lasky , Nikhil Sarin , Greg Ashton

The merger of a binary of neutron stars provides natural explanations for many of the features of short gamma-ray bursts (SGRBs), such as the generation of a hot torus orbiting a rapidly rotating black hole, which can then build a magnetic…

High Energy Astrophysical Phenomena · Physics 2015-04-06 Luciano Rezzolla , Pawan Kumar

The precise origin of short gamma ray bursts (SGRBs) remains an important open question in relativistic astrophysics. Increasingly, observational evidence suggests the merger of a binary compact object system as the source for most SGRBs,…

High Energy Astrophysical Phenomena · Physics 2014-03-21 Nicholas Stone , Abraham Loeb , Edo Berger

Short Gamma-Ray Bursts (SGRBs) are among the most luminous explosions in the universe, releasing in less than one second the energy emitted by our Galaxy over one year. Despite decades of observations, the nature of their "central-engine"…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Luciano Rezzolla , Bruno Giacomazzo , Luca Baiotti , Jonathan Granot , Chryssa Kouveliotou , Miguel A. Aloy

Bimodal distribution of the observed duration of gamma-ray bursts (GRBs) has led to two distinct progenitors; compact star mergers, either two neutron stars (NSs) or a NS and a black hole (BH), for short GRBs (SGRBs), and so-called…

High Energy Astrophysical Phenomena · Physics 2023-05-25 Petrosian Vah/'e , Maria Giovanna Dainotti

We present the results from new relativistic hydrodynamic simulations of binary neutron star mergers using realistic non-zero temperature equations of state. We vary several unknown parameters in the system such as the neutron star (NS)…

Astrophysics · Physics 2009-11-11 Roland Oechslin , Thomas Janka

The most popular model for short gamma-ray bursts (sGRBs) involves the coalescence of binary neutron stars. Because the progenitor is actually hidden from view, we must consider under which circumstances such merging systems are capable of…

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