scholarly journals Gamma-ray bursts as a probe of the very high redshift universe

2000 ◽  
Author(s):  
Donald Q. Lamb
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
High Redshift Universe ◽  
Very High

scholarly journals Gamma‐Ray Bursts as a Probe of the Very High Redshift Universe

2000 ◽  
Vol 536 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Donald Q. Lamb ◽  
Daniel E. Reichart
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
High Redshift Universe ◽  
Very High

Gamma-ray bursts and cosmology

2007 ◽  
Vol 365 (1854) ◽  
pp. 1363-1376 ◽  
Author(s):  
D.Q Lamb
Keyword(s):  
Dark Energy ◽  
Early Universe ◽  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
Current Status ◽  
Scientific Results ◽  
Short Grbs ◽  
Very High

I review the current status of the use of gamma-ray bursts (GRBs) as probes of the early Universe and cosmology. I describe the promise of long GRBs as probes of the high redshift ( z >4) and very high redshift ( z >5) Universe, and several key scientific results that have come from observations made possible by accurate, rapid localizations of these bursts by Swift. I then estimate the fraction of long GRBs that lie at very high redshifts and discuss ways in which it may be possible to rapidly identify—and therefore study—a larger number of these bursts. Finally, I discuss the ways in which both long and short GRBs can be made ‘standard candles’ and used to constrain the properties of dark energy.

scholarly journals Gamma-ray bursts: cosmic rulers for the high-redshift universe?

2007 ◽  
Vol 365 (1854) ◽  
pp. 1395-1397 ◽  
Author(s):  
Fiona C Speirits ◽  
Martin A Hendry ◽  
Alejandro Gonzalez
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Current Data ◽  
Gamma Ray Bursts ◽  
Luminosity Distance ◽  
Conformal Gravity ◽  
Hubble Diagram ◽  
Cosmological Distance Scale ◽  
Standard Candle ◽  
High Redshift Universe

The desire to extend the Hubble Diagram to higher redshifts than the range of current Type 1a Supernovae observations has prompted investigation into spectral correlations in gamma-ray bursts (GBRs), in the hope that standard candle-like properties can be identified. In this paper, we discuss the potential of these new ‘cosmic rulers’ and highlight their limitations by investigating the constraints that current data can place on an alternative Cosmological model in the form of Conformal Gravity. By fitting current Type 1a Supernovae and GRB data to the predicted luminosity distance redshift relation of both the standard Concordance Model and the Conformal Gravity, we show that currently neither model is strongly favoured at high redshift. The scatter in the current GRB data testifies to the further work required if GRBs are to cement their place as effective probes of the cosmological distance scale.

scholarly journals Observing the First Stars, One Star at a Time

2005 ◽  
Vol 192 ◽  
pp. 543-553
Author(s):  
Abraham Loeb
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Gamma Ray ◽  
Massive Stars ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
First Stars ◽  
New Era ◽  
The Many ◽  
High Redshift Universe

SummaryGamma-Ray Bursts (GRBs) are believed to originate in compact remnants (black holes or neutron stars) of massive stars. Their high luminosities make them detectable out to the edge of the visible universe. We describe the many advantages of GRB afterglows relative to quasars as probes of the intergalactic medium during the epoch of reionization. The Swift satellite, planned for launch by the end of 2004, will likely open a new era in observations of the high redshift universe.

scholarly journals THE HOST GALAXIES OFSWIFTDARK GAMMA-RAY BURSTS: OBSERVATIONAL CONSTRAINTS ON HIGHLY OBSCURED AND VERY HIGH REDSHIFT GRBs

2009 ◽  
Vol 138 (6) ◽  
pp. 1690-1708 ◽  
Author(s):  
D. A. Perley ◽  
S. B. Cenko ◽  
J. S. Bloom ◽  
H.-W. Chen ◽  
N. R. Butler ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
Observational Constraints ◽  
Host Galaxies ◽  
Very High

scholarly journals Spatial distribution of the gamma-ray bursts at very high redshift

2017 ◽  
Vol 12 (S333) ◽  
pp. 203-206
Author(s):  
Attila Mészáros
Keyword(s):  
Spatial Distribution ◽  
Star Formation ◽  
Gamma Ray ◽  
Star Formation Rate ◽  
High Redshift ◽  
Formation Rate ◽  
Gamma Ray Bursts ◽  
Cosmological Principle ◽  
Statistical Studies ◽  
Very High

AbstractThe author - with his collaborators - already in years 1995-96 have shown - purely from the analyses of the observations - that the gamma-ray bursts (GRBs) can be till redshift 20. Since that time several other statistical studies of the spatial distribution of GRBs were provided. Remarkable conclusions concerning the star-formation rate and the validity of the cosmological principle were obtained about the regions of the cosmic dawn. In this contribution these efforts are surveyed.

scholarly journals On the detection of very high redshift gamma-ray bursts with Swift

2007 ◽  
Vol 380 (1) ◽  
pp. L45-L48 ◽  
Author(s):  
R. Salvaterra ◽  
S. Campana ◽  
G. Chincarini ◽  
G. Tagliaferri ◽  
S. Covino
Keyword(s):  
Gamma Ray ◽  
High Redshift ◽  
Gamma Ray Bursts ◽  
Very High
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