Measuring the Universe with Gamma-Ray Bursts: status, perspectives and SKA contribution

2014 ◽  
Vol 526 (7-8) ◽  
pp. 340-346 ◽  
Author(s):  
Lorenzo Amati
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
The Universe

scholarly journals Gamma-ray bursts from stellar remnants: probing the Universe at high redshift

1998 ◽  
Vol 294 (1) ◽  
pp. L13-L17 ◽  
Author(s):  
R. A. M. J. Wijers ◽  
J. S. Bloom ◽  
J. S. Bagla ◽  
P. Natarajan
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
The Universe

Gamma-Ray Bursts as Probes of the Universe

2011 ◽  
Author(s):  
Joshua S. Bloom
Keyword(s):  
Star Formation ◽  
Cosmic Rays ◽  
Gravitational Waves ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Ongoing Study ◽  
Observable Universe ◽  
History Of ◽  
Expansion Of The Universe ◽  
The Universe

This chapter focuses on how gamma-ray bursts (GRBs) are emerging as unique tools in the study of broad areas of astronomy and physics by virtue of their special properties. The unassailable fact about GRBs that makes them such great probes is that they are fantastically bright and so can be seen to the farthest reaches of the observable Universe. In parallel with the ongoing study of GRB events and progenitors, new lines of inquiry have burgeoned: using GRBs as unique probes of the Universe in ways that are almost completely divorced from the nature of GRBs themselves. Topics discussed include studies of gas, dust, and galaxies; the history of star formation; measuring reionization and the first objects in the universe; neutrinos, gravitational waves, and cosmic rays; quantum gravity and the expansion of the universe; and the future of GRBs.

Gamma-Ray Bursts as X-Ray Depth Gauges of the Universe

2003 ◽  
Vol 591 (2) ◽  
pp. L91-L94 ◽  
Author(s):  
P. Mszros ◽  
M. J. Rees
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
X Ray ◽  
The Universe

scholarly journals GRAVITATIONAL LENSING BOUND ON THE AVERAGE REDSHIFT OF GAMMA RAY BURSTS IN MODELS WITH EVOLVING LENSES

1999 ◽  
Vol 08 (04) ◽  
pp. 507-517 ◽  
Author(s):  
DEEPAK JAIN ◽  
N. PANCHAPAKESAN ◽  
S. MAHAJAN ◽  
V. B. BHATIA
Keyword(s):  
Gravitational Lensing ◽  
Gamma Ray ◽  
Cosmological Parameters ◽  
Evolutionary Model ◽  
Gamma Ray Bursts ◽  
The Other ◽  
Upper Limit ◽  
Evolving Model ◽  
Evolving Models ◽  
The Universe

Identification of gravitationally lensed Gamma Ray Bursts (GRBs) in the BATSE 4B catalog can be used to constrain the average redshift <z> of the GRBs. In this paper we investigate the effect of evolving lenses on the <z> of GRBs in different cosmological models of the universe. The cosmological parameters Ω and Λ have an effect on the <z> of GRBs. The other factor which can change the <z> is the evolution of galaxies. We consider three evolutionary model of galaxies. In particular, we find that the upper limit on <z> of GRBs is higher in evolving model of galaxies as compared to non-evolving models of galaxies.

scholarly journals Gamma-Ray Bursts: New Rulers to Measure the Universe

2004 ◽  
Vol 613 (1) ◽  
pp. L13-L16 ◽  
Author(s):  
Giancarlo Ghirlanda ◽  
Gabriele Ghisellini ◽  
Davide Lazzati ◽  
Claudio Firmani
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
The Universe

scholarly journals Spatial Distribution of the Gamma-ray Bursts and the Cosmological Principle

2016 ◽  
Vol 12 (S324) ◽  
pp. 89-90
Author(s):  
Attila Mészáros
Keyword(s):  
Spatial Distribution ◽  
Angular Distribution ◽  
Large Scale ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Cosmological Principle ◽  
The Universe

AbstractThe Cosmological Principle claims that in the large scale average the visible parts of the universe are isotropic and homogeneous. In year 1998 the author, together with his two colleagues, discovered that the BATSE’s short gamma-ray bursts are not distributed isotropically on the sky. This first discovery was followed by other ones confirming both the existence of anisotropies in the angular distribution of bursts and the existence of huge Gpc structures in the spatial distribution. All this means that these anisotropies should reject the Cosmological Principle, because the large scale averaging hardly can be provided. This was claimed in year 2009. The aim of this contribution is to survey these publications since 1998 till today.

scholarly journals IN SEARCH FOR NATURAL WORMHOLES

1999 ◽  
Vol 14 (12) ◽  
pp. 791-797 ◽  
Author(s):  
LUIS A. ANCHORDOQUI ◽  
DIEGO F. TORRES ◽  
GUSTAVO E. ROMERO ◽  
I. ANDRUCHOW
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Database Searching ◽  
Time Profiles ◽  
The Universe

We have investigated 631 time profiles of gamma ray bursts from the BATSE database searching for observable signatures produced by microlensing events related to natural wormholes. The results of this first search of topologically nontrivial objects in the Universe can be used to constrain their number and mass.

scholarly journals The Swift satellite lives up to its name, revealing cosmic explosions as they happen

2008 ◽  
Vol 366 (1884) ◽  
pp. 4393-4404 ◽  
Author(s):  
Rhaana L.C Starling
Keyword(s):  
Gamma Radiation ◽  
Gamma Ray ◽  
Massive Stars ◽  
Gamma Ray Bursts ◽  
Electromagnetic Spectrum ◽  
Distant Galaxies ◽  
The 1960S ◽  
Cosmic Explosions ◽  
The Universe

Gamma-ray bursts are the most powerful objects in the Universe. Discovered in the 1960s as brief flashes of gamma radiation, we now know that they emit across the entire electromagnetic spectrum, are located in distant galaxies and comprise two distinct populations, one of which may originate in the deaths of massive stars. The launch of the Swift satellite in 2004 brought a flurry of new discoveries, advancing our understanding of these sources and the galaxies that host them. I highlight a number of important results from the Swift era thus far.

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