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The ejecta from binary neutron star mergers, which powers its associated kilonova, can inform us about source properties, merger dynamics, and the dense nuclear matter equation of state. While now in the era of multi-messenger astronomy, we…

高能天体物理现象 · 物理学 2025-04-08 Amelia Henkel , Francois Foucart , Selah Melfor , Samaya Nissanke , Alexandra Wernersson , Uddipta Bhardwaj

We describe the afterglows of the long gamma-ray-burst (GRB) 130427A within the context of a binary-driven hypernova (BdHN). The afterglows originate from the interaction between a newly born neutron star ($\nu$NS), created by an Ic…

高能天体物理现象 · 物理学 2018-12-26 R. Ruffini , M. Karlica , N. Sahakyan , J. A. Rueda , Y. Wang , G. J. Mathews , C. L. Bianco , M. Muccino

The discovery of GW170817 and GRB 170817A in tandem with AT 2017gfo cemented the connection between neutron star mergers, short gamma-ray bursts (GRBs), and kilonovae. To investigate short GRB observations in the context of diverse kilonova…

A macronova (or kilonova) was observed as an infrared excess several days after short gamma-ray burst, GRB 130603B. Although the $r$-process radioactivity is widely discussed as an energy source, it requires huge mass of ejecta from a…

高能天体物理现象 · 物理学 2016-02-17 Shota Kisaka , Kunihito Ioka , Ehud Nakar

For decades, gamma-ray bursts (GRBs) have been broadly divided into `long'- and `short'-duration bursts, lasting more or less than 2s, respectively. However, this dichotomy does not map perfectly to the two progenitor channels that are…

The coalescence of a binary neutron star (NS) system may in some cases produce a massive NS remnant that is long-lived and, potentially, indefinitely stable to gravitational collapse. Such a remnant has been proposed as an explanation for…

高能天体物理现象 · 物理学 2015-06-17 Brian D. Metzger , Geoffrey C. Bower

The energy source has remained to be the great mystery in understanding of the gamma-ray bursts (GRBs) if the events are placed at cosmological distances as indicated by a number of recent observations. The currently popular models include…

天体物理学 · 物理学 2009-10-30 Bo Qin , Xiang-Ping Wu , Ming-Chung Chu , Li-Zhi Fang , Jing-Yao Hu

Mergers of binary neutron stars (NSs) usually result in the formation of a hypermassive neutron star (HMNS). Whether- and when this remnant collapses to a black hole (BH) depends primarily on the equation of state and on angular momentum…

高能天体物理现象 · 物理学 2015-06-18 Brian D. Metzger , Rodrigo Fernández

The recent coincident detection of gravitational waves (GW) from a binary neutron star merger with aLIGO/Virgo and short-lived gamma-ray emission with Fermi/GBM (called GW 170817) is a milestone for the establishment of multi-messenger…

高能天体物理现象 · 物理学 2017-10-17 J. Michael Burgess , Jochen Greiner , Damien Begue , Dimitrios Giannios , Francesco Berlato , Vladimir M. Lipunov

We predict the rate at which Gamma-Ray Burst (GRB) afterglows should be detected in supernova searches as a function of limiting flux. Although GRB afterglows are rarer than supernovae, they are detectable at greater distances because of…

天体物理学 · 物理学 2009-10-30 Eric Woods , Abraham Loeb

The historic first joint detection of both gravitational wave and electromagnetic emission from a binary neutron star merger cemented the association between short gamma-ray bursts (SGRBs) and compact object mergers, as well as providing a…

The recent discovery of the neutron star merger and multi-messenger event GW170817 (also known as kilonova GRB170817A) provides an unprecedented laboratory in which to study these mysterious objects, as well as an opportunity to test…

高能天体物理现象 · 物理学 2019-01-01 Samar Safi-Harb , Neil Doerksen , Adam Rogers , Chris L. Fryer

We severely criticize the consuetudinary analysis of the afterglows of gamma-ray bursts (GRBs) in the conical-ejection fireball scenarios. We argue that, instead, recent observations imply that the long-duration GRBs and their afterglows…

天体物理学 · 物理学 2009-09-25 Shlomo Dado , Arnon Dar , A. De Rujula

GRB200522A is a short duration gamma-ray burst (GRB) at redshift $z$=0.554 characterized by a bright infrared counterpart. A possible, although not unambiguous, interpretation of the observed emission is the onset of a luminous kilonova…

高能天体物理现象 · 物理学 2021-05-12 G. Bruni , B. O'Connor , T. Matsumoto , E. Troja , T. Piran , L. Piro , R. Ricci

It is widely believed that multiwavelength afterglows of gamma-ray bursts (GRBs) originate from relativistic blast waves. We here show that in such blast waves, a significant fraction of the energy of shock-accelerated protons would be lost…

天体物理学 · 物理学 2009-11-07 Z. Li , Z. G. Dai , T. Lu

The gamma-ray burst (GRB) jet powers the afterglow emission by shocking the surrounding medium, and radio afterglow can now be routinely observed to almost a year after the explosion. Long-duration GRBs are accompanied by supernovae (SNe)…

高能天体物理现象 · 物理学 2015-10-09 Rodolfo Barniol Duran , Dimitrios Giannios

Long duration gamma-ray bursts (GRB) are at cosmological distance, they appear to be located near star forming regions, and are likely associated with some type of supernovae. They are also likely to be strongly beamed, which lowers their…

天体物理学 · 物理学 2007-05-23 Bohdan Paczynski

We study the broadband radiation behavior of a kilonova ejecta-pulsar wind nebula (PWN) system. In this model, we jointly fit the observations of AT 2017gfo in UV-optical-IR bands and the late-time X-ray afterglow of GRB 170817A. Our work…

高能天体物理现象 · 物理学 2022-04-06 Jia Ren , Zi-Gao Dai

The neutron star merger, GW170817, was followed by an optical-infrared transient (a kilonova) which indicated that a substantial ejection of mass at trans-relativistic velocities occurred during the merger. Modeling of the kilonova is able…

高能天体物理现象 · 物理学 2019-06-19 Adithan Kathirgamaraju , Dimitrios Giannios , Paz Beniamini

The merger of two neutron stars has been predicted to produce an optical-infrared transient (lasting a few days) known as a 'kilonova', powered by the radioactive decay of neutron-rich species synthesized in the merger. Evidence that short…