A peculiar low-luminosity short gamma-ray burst from a double neutron star merger progenitor

Zhang, B.-B.; Zhang, B.; Sun, Hui; Lei, Wei‐Hua; Gao, He; Li, Y.; Shao, L.; Zhao, Yue; Hu, Y. D.; Lü, Hou-Jun; Wu, Xue-Feng; Fan, X.; Wang, Gang; Castro‐Tirado, Alberto J.; Zhang, S.; Yu, Bingkun; Cao, Y.; Liang, En‐Wei

doi:10.1038/s41467-018-02847-3

Cited by 147 publications

(81 citation statements)

References 54 publications

(80 reference statements)

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“…The estimated WD-WD merger rate (see Sec. 2) implies that 0.1% of WD-WD mergers can explain the GRB 170817A-like population for which a lower limit of (30-630) Gpc −3 yr −1 has been recently obtained (see [65] for details). The energy observed in gamma-rays in GRB 170817A, E iso ≈ 3 × 10 46 erg, can originate from flares owing to the twist and stress of the magnetic field lines during the merger process: a magnetic energy of 2 × 10 46 erg is stored in a region of radius 10 9 cm and magnetic field of 10 10 G [43].…”

Section: Wd-wd Mergers As An Alternative Mildly Relativistic Uncollimmentioning

confidence: 92%

GRB 170817A-GW170817-AT 2017gfo and the observations of NS-NS, NS-WD and WD-WD mergers

Rueda

Ruffini

Wang

et al. 2018

J. Cosmol. Astropart. Phys.

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The LIGO-Virgo Collaboration has announced the detection of GW170817 and has associated it with GRB 170817A. These signals have been followed after 11 hours by the optical and infrared emission of AT 2017gfo. The origin of this complex phenomenon has been attributed to a neutron star-neutron star (NS-NS) merger. In order to probe this association we confront our current understanding of the gravitational waves and associated electromagnetic radiation with four observed GRBs originating in binaries composed of different combinations NSs and white dwarfs (WDs). We consider 1) GRB 090510 the prototype of NS-NS merger leading to a black hole (BH); 2) GRB 130603B the prototype of a NS-NS merger leading to massive NS (MNS) with an associated kilonova; 3) GRB 060614 the prototype of a NS-WD merger leading to a MNS with an associated kilonova candidate; 4) GRB 170817A the prototype of a WD-WD merger leading to massive WD with an associated AT 2017gfo-like emission. None of these systems support the above mentioned association. The clear association between GRB 170817A and AT 2017gfo has led to introduce a new model based on on a new subfamily of GRBs originating from WD-WD mergers. We show how this novel model is in agreement with the exceptional observations in the optical, infrared, X-and gamma-rays of GRB 170817A-AT 2017gfo.

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Section: Wd-wd Mergers As An Alternative Mildly Relativistic Uncollimmentioning

confidence: 92%

GRB 170817A-GW170817-AT 2017gfo and the observations of NS-NS, NS-WD and WD-WD mergers

Rueda

Ruffini

Wang

et al. 2018

J. Cosmol. Astropart. Phys.

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“…The second run (O2) of Advanced LIGO and Advanced Virgo led to the breakthrough discovery of the first GW signal 1 from a neutron star (NS) merger coincident with the short duration GRB170817A 2 – 4 , at a distance of 40 Mpc. In several aspects GRB170817A differs from the garden-variety short GRBs observed at cosmological distances.…”

Section: Introductionmentioning

confidence: 99%

A luminous blue kilonova and an off-axis jet from a compact binary merger at z = 0.1341

et al. 2018

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The recent discovery of a gamma-ray burst (GRB) coincident with the gravitational-wave (GW) event GW170817 revealed the existence of a population of low-luminosity short duration gamma-ray transients produced by neutron star mergers in the nearby Universe. These events could be routinely detected by existing gamma-ray monitors, yet previous observations failed to identify them without the aid of GW triggers. Here we show that GRB150101B is an analogue of GRB170817A located at a cosmological distance. GRB150101B is a faint short burst characterized by a bright optical counterpart and a long-lived X-ray afterglow. These properties are unusual for standard short GRBs and are instead consistent with an explosion viewed off-axis: the optical light is produced by a luminous kilonova, while the observed X-rays trace the GRB afterglow viewed at an angle of ~13°. Our findings suggest that these properties could be common among future electromagnetic counterparts of GW sources.

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“…The light curve of CDF-S XT2 (listed in Table 1) contains a total of 136 photons, with the T 90 parameter estimated to be 11.1 +0. 4 −0.6 ks (i.e., the timespan from the 5%-th to 95%-th of the total measured counts; throughout this paper, we quote 1-σ errors unless stated otherwise). The light curve can be well fitted by a broken power-law model using the Markov Chain Monte Carlo code emcee 19 , with the best-fit power-law slopes being −0.14 +0.03 −0.03 before the break (at t b = 2.3 +0.4 −0.3 ks) and −2.16 +0.26 −0.29 after the break, respectively (see Fig.…”

mentioning

confidence: 99%

A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger

Xue

Zheng

et al. 2019

Nature

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115

168

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Neutron star-neutron star mergers are known to be associated with short gammaray bursts 1-4 . If the neutron star equation of state is sufficiently stiff, at least some of such mergers will leave behind a supramassive or even a stable neutron star that spins rapidly with a strong magnetic field (i.e., a magnetar) 5-8 . Such a magnetar signature may have been observed as the X-ray plateau following a good fraction (up to 50%) of short gamma-ray bursts 9, 10 , and it has been expected that one may observe short gamma-ray burst-less X-ray transients powered by double neutron star mergers 11, 12 . A fast X-ray transient (CDF-S XT1) was recently found to be associated with a faint host galaxy whose redshift is unknown 13 . Its X-ray and host-galaxy properties allow several possible explanations including a short gamma-ray burst seen off axis, a low-luminosity gamma-ray burst at high redshift, or a tidal disruption event involving an intermediate mass black hole and a white dwarf 13 . Here we report a second X-ray transient, CDF-S XT2, that is associated with a galaxy at redshift z = 0.738 14 .The light curve is fully consistent with being powered by a millisecond magnetar. More intriguingly, CDF-S XT2 lies in the outskirts of its star-forming host galaxy with a moderate offset from the galaxy center, as short bursts often do 15,16 . The estimated event rate density of similar X-ray transients, when corrected to the local value, is consistent with the double neutron star merger rate density inferred from the detection of GW170817 1 .Upon the completion of the deepest X-ray survey to date, the 7 Ms Chandra Deep Field-

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A peculiar low-luminosity short gamma-ray burst from a double neutron star merger progenitor

Cited by 147 publications

References 54 publications

GRB 170817A-GW170817-AT 2017gfo and the observations of NS-NS, NS-WD and WD-WD mergers

GRB 170817A-GW170817-AT 2017gfo and the observations of NS-NS, NS-WD and WD-WD mergers

A luminous blue kilonova and an off-axis jet from a compact binary merger at z = 0.1341

A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger

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