Cosmic gamma-ray burst from intergalactic relativistic dust grains

Dasgupta, A. K.

doi:10.1007/bf00638920

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…For a local heliospheric origin, the distance constraints required by COMPTEL/IPN burst location measurements dispute any scenarios in which the sources of brighter (and therefore closer, assuming bursts are roughly "standard luminosity candles") GRBs are nearer than ∼100 AU (approximately the distance of the solar wind termination shock). Relativistic dust grain models (Grindlay & Fazio 1974;Dasgupta 1979) and nearby (40-400 AU) colliding comet scenarios (White 1993(White , 1994 are therefore unfavorable. More distant Oort cloud models involving mergers between comets, antimatter and/or primordial black holes (Katz 1993;Dermer 1996;Bickert & Greiner 1993) are not excluded by our distance limits.…”

Section: Summary and Discussionmentioning

confidence: 99%

The Locations of Gamma‐Ray Bursts Measured by COMPTEL

Kippen

Ryan

Connors

et al. 1998

ApJ

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The COMPTEL instrument on the Compton Gamma Ray Observatory is used to measure the locations of gamma-ray bursts through direct imaging of MeV photons. In a comprehensive search, we have detected and localized 29 bursts observed between 1991 April 19 and 1995 May 31. The average location accuracy of these events is 1.25 • (1σ), including a systematic error of ∼0.5 • , which is verified through comparison with Interplanetary Network (IPN) timing annuli. The combination of COMPTEL and IPN measurements results in locations for 26 of the bursts with an average "error box" area of only ∼0.3 deg 2 (1σ). We find that the angular distribution of COMPTEL burst locations is consistent with large-scale isotropy and that there is no statistically significant evidence of small-angle auto-correlations. We conclude that there is no compelling evidence for burst repetition since no more than two of the events (or ∼7% of the 29 bursts) could possibly have come from the same source. We also find that there is no significant correlation between the burst locations and either Abell clusters of galaxies or radio-quiet quasars. Agreement between individual COMPTEL locations and IPN annuli places a lower limit of ∼100 AU (95% confidence) on the distance to the stronger bursts.

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Section: Summary and Discussionmentioning

confidence: 99%

The Locations of Gamma‐Ray Bursts Measured by COMPTEL

Kippen

Ryan

Connors

et al. 1998

ApJ

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“…The destruction of relativistic grains by sputtering in the Galaxy was briefly discussed in Dasgupta (1979). The study extrapolated the sputtering yield obtained from the knock-on sputtering regime (the low-energy regime E < 1 MeV) for the E > 1 GeV range.…”

Section: Introductionmentioning

confidence: 99%

On Origin and Destruction of Relativistic Dust and Its Implication for Ultrahigh Energy Cosmic Rays

Hoang

Lazarían

Schlickeiser

2015

ApJ

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Dust grains may be accelerated to relativistic speeds by radiation pressure, diffusive shocks, and other acceleration mechanisms. Such relativistic grains have been suggested as primary particles of ultrahigh energy cosmic rays (UHECRs). In this paper, we first revisit the problem of acceleration by radiation pressure and calculate maximum grain velocities achieved. We find that grains can be accelerated to relativistic speeds with Lorentz factor γ < 2 by powerful radiation sources, which is lower than earlier estimates showing that γ could reach ∼ 10. We then investigate different destruction mechanisms for relativistic grains traversing a variety of environments. In solar radiation, we find that the destruction by thermal sublimation and Coulomb explosions is important. We also quantify grain destruction due to electronic sputtering by ions and grain-grain collisions. Electronic sputtering is found to be rather inefficient, whereas the evaporation following grain-grain collisions is shown to be an important mechanism for which the a ∼ 0.01 − 1 µm grains would be destroyed after sweeping a gas column N Coul ∼ 5×10 19 −5×10 20 cm −2 . Relativistic dust in the interstellar medium and intergalactic medium (IGM) would be disrupted by Coulomb explosions due to collisional charging after traversing a gas column N Coul ∼ 10 17 cm −2 unless grain material is very strong. We show that photoelectric emission by optical and ultraviolet background radiation is also significant for the destruction of relativistic dust in the IGM. The obtained results indicate that relativistic dust from galaxies would be destroyed before reaching the Earth's atmosphere and unlikely to account for UHECRs.

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On the production of suprathermal grains

Dasgupta

1980

Astrophys Space Sci

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Cosmic gamma-ray burst from intergalactic relativistic dust grains

Cited by 5 publications

References 8 publications

The Locations of Gamma‐Ray Bursts Measured by COMPTEL

The Locations of Gamma‐Ray Bursts Measured by COMPTEL

On Origin and Destruction of Relativistic Dust and Its Implication for Ultrahigh Energy Cosmic Rays

On the production of suprathermal grains

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