scholarly journals Strong lensing of gamma ray bursts as a probe of compact dark matter

2018 ◽  
Vol 98 (12) ◽  
Author(s):  
Lingyuan Ji ◽  
Ely D. Kovetz ◽  
Marc Kamionkowski
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Strong Lensing

A REVIEW OF PARTICLE ASTROPHYSICS WITH ICECUBE

2012 ◽  
Vol 27 (39) ◽  
pp. 1230042 ◽  
Author(s):  
IGNACIO TABOADA
Keyword(s):  
Dark Matter ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Point Sources ◽  
Cherenkov Light ◽  
Atmospheric Neutrinos ◽  
Neutrino Detector ◽  
Secondary Particles ◽  
Particle Astrophysics

IceCube is a neutrino detector sensitive to energies above 10 GeV. IceCube operates by sensing the Cherenkov light from secondary particles produced in neutrino-matter interactions. One gigaton of highly transparent Antarctic ice is instrumented to achieve this goal. Designed to be modular, IceCube has been collecting data since construction began in 2005. Construction was completed in December 2010. The primary goal of IceCube is to observe astrophysical sources of neutrinos. We present here a summary of IceCube's recent results in atmospheric neutrinos, point sources, diffuse fluxes of neutrinos, cosmogenic neutrinos, a lack of correlation between neutrinos and Gamma Ray Bursts and the search for dark matter.

Searching gamma-ray bursts for gravitational lensing echoes - Implications for compact dark matter

1993 ◽  
Vol 414 ◽  
pp. 36 ◽  
Author(s):  
R. J. Nemiroff ◽  
J. P. Norris ◽  
W. A. D. T. Wickramasinghe ◽  
J. M. Horack ◽  
C. Kouveliotou ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gravitational Lensing ◽  
Gamma Ray ◽  
Gamma Ray Bursts

scholarly journals Dark photon dark matter and fast radio bursts

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Ricardo G. Landim
Keyword(s):  
Dark Matter ◽  
Time Delay ◽  
Parameter Space ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Radio Bursts ◽  
Free Electrons ◽  
Weak Equivalence Principle ◽  
Dark Photon ◽  
The Standard Model

AbstractThe nature of dark matter (DM) is still a mystery that may indicate the necessity for extensions of the Standard Model (SM). Light dark photons (DP) may comprise partially or entirely the observed DM density and existing limits for the DP DM parameter space arise from several cosmological and astrophysical sources. In the present work we investigate DP DM using cosmic transients, specifically fast radio bursts (FRBs). The observed time delay of radio photons with different energies have been used to constrain the photon mass or the Weak Equivalence Principle, for example. Due to the mixing between the visible and the DP, the time delay of photons from these cosmic transients, caused by free electrons in the intergalactic medium, can change and impact those constraints from FRBs. We use five detected FRBs and two associations of FRBs with gamma-ray bursts to investigate the correspondent variation on the time delay caused by the presence of DP DM. The result is virtually independent of the FRB used and this variation is very small, considering the still allowed DP DM parameter space, not jeopardizing current bounds on other contributions of the observed time delay.

scholarly journals SHORT GAMMA-RAY BURSTS AND DARK MATTER SEEDING IN NEUTRON STARS

2013 ◽  
Vol 768 (2) ◽  
pp. 145 ◽  
Author(s):  
M. Ángeles Pérez-García ◽  
F. Daigne ◽  
J. Silk
Keyword(s):  
Dark Matter ◽  
Neutron Stars ◽  
Gamma Ray ◽  
Gamma Ray Bursts

Space Science

2005 ◽  
Author(s):  
Michael D. Lemonick
Keyword(s):  
Dark Matter ◽  
Solid Rock ◽  
Hot Springs ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Nearby Stars ◽  
Gravitational Influence ◽  
New Space ◽  
The Universe ◽  
Modern Astronomy

Astronomy is the only branch of science where the questions are literally cosmic. Its practitioners are trying to answer the most profound questions imaginable, the same questions that philosophers have been wrestling with for thousands of years. How big is the universe? How old is it? What is it made of? Are we alone, or do other intelligent beings live on planets orbiting distant stars? How did the cosmos begin? And how will it end? As recently as a decade ago, none of these questions had been answered in any definitive way. Now, thanks to powerful new space-based observatories and ingenious new techniques for gazing up from the ground, astronomers have cracked some of them. We now know that the universe is 13.7 billion years old, that more than 100 planets circle Sun-like stars right in our celestial neighbour-hood, and that the cosmos is likely to expand forever, until all the stars have burned out and matter itself breaks down. We know that gamma ray bursts—explosions so massive they defied understanding for decades—are exploding stars more powerful than anyone had imagined. Yet plenty of mysteries remain. Astronomers know that the visible stars and galaxies add up to only a fifth or so of the matter in the universe. The rest is some sort of mysterious dark matter, detectable only through its gravitational influence on the visible stuff. The search for dark matter is still a major focus of modern astronomy. Closer to home, there's a major push to find not just planets, but Earthlike planets orbiting nearby stars. The massive, gaseous, Jupiter-like planets found so far are impressive enough, but as far as we know, you need something smaller and more solid to support life—the ultimate goal of planet-searchers. Indeed, while astronomers had long since given up looking for life in our own solar system, biologists have given them new hope. Life, it turns out, can live in far harsher conditions than anyone thought (hot springs, Antarctic ice, inside solid rock), which means it could exist under the surface of Mars or in oceans under the icy coating of Jupiter's moon Europa.

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