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 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

scholarly journals FUNDAMENTAL PHYSICS FROM BLACK HOLES, NEUTRON STARS AND GAMMA-RAY BURSTS

2011 ◽  
Vol 20 (10) ◽  
pp. 1797-1872 ◽  
Author(s):  
REMO RUFFINI
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
White Dwarfs ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Theoretical Physics ◽  
Fundamental Physics

Gamma-ray bursts (GRBs) and supernovae (SNe) bring new perspectives to the study of neutron stars and white dwarfs, as well as opening new branches of theoretical physics and astrophysics.

scholarly journals GRB 130427A: A Nearby Ordinary Monster

Science ◽  
2013 ◽  
Vol 343 (6166) ◽  
pp. 48-51 ◽  
Author(s):  
A. Maselli ◽  
A. Melandri ◽  
L. Nava ◽  
C. G. Mundell ◽  
N. Kawai ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Massive Stars ◽  
High Redshift ◽  
Full Range ◽  
Gamma Ray Bursts ◽  
Central Engine ◽  
Long Duration ◽  
Relative Proximity ◽  
Γ Ray ◽  
Burst Emission

Long-duration gamma-ray bursts (GRBs) are an extremely rare outcome of the collapse of massive stars and are typically found in the distant universe. Because of its intrinsic luminosity (L ∼ 3 × 1053 ergs per second) and its relative proximity (z = 0.34), GRB 130427A reached the highest fluence observed in the γ-ray band. Here, we present a comprehensive multiwavelength view of GRB 130427A with Swift, the 2-meter Liverpool and Faulkes telescopes, and by other ground-based facilities, highlighting the evolution of the burst emission from the prompt to the afterglow phase. The properties of GRB 130427A are similar to those of the most luminous, high-redshift GRBs, suggesting that a common central engine is responsible for producing GRBs in both the contemporary and the early universe and over the full range of GRB isotropic energies.

scholarly journals Stellar evolution models at the Magellanic Cloud metallicities

2008 ◽  
Vol 4 (S256) ◽  
pp. 337-342
Author(s):  
Raphael Hirschi ◽  
Sylvia Ekström ◽  
Cyril Georgy ◽  
Georges Meynet ◽  
André Maeder
Keyword(s):  
Stellar Evolution ◽  
Gamma Ray ◽  
Massive Stars ◽  
Gamma Ray Bursts ◽  
Magellanic Clouds ◽  
Observational Constraints ◽  
Surface Enrichment ◽  
First Stars ◽  
Effects Of Rotation ◽  
The Impact

AbstractThe Magellanic Clouds are great laboratories to study the evolution of stars at two metallicities lower than solar. They provide excellent testbeds for stellar evolution theory and in particular for the impact of metallicity on stellar evolution. It is important to test stellar evolution models at metallicities lower than solar in order to use the models to predict the evolution and properties of the first stars. In these proceedings, after recalling the effects of metallicity, we present stellar evolution models including the effects of rotation at the Magellanic Clouds metallicities. We then compare the models to various observations (ratios of sub-groups of massive stars and supernovae, nitrogen surface enrichment and gamma-ray bursts) and show that the models including the effects of rotation reproduce most of the observational constraints.

scholarly journals Environments of massive stars and the upper mass limit

2011 ◽  
Vol 7 (S279) ◽  
pp. 9-17
Author(s):  
Paul A. Crowther
Keyword(s):  
Gamma Ray ◽  
Massive Stars ◽  
High Redshift ◽  
Star Clusters ◽  
Stellar Mass ◽  
Gamma Ray Bursts ◽  
Core Collapse ◽  
Mass Limit ◽  
Host Galaxies ◽  
Long Duration

AbstractThe locations of massive stars (≥ 8M⊙) within their host galaxies is reviewed. These range from distributed OB associations to dense star clusters within giant Hii regions. A comparison between massive stars and the environments of core-collapse supernovae and long duration Gamma Ray Bursts is made, both at low and high redshift. We also address the question of the upper stellar mass limit, since very massive stars (VMS, Minit ≫ 100M⊙) may produce exceptionally bright core-collapse supernovae or pair instability supernovae.

scholarly journals DIVISION IV / WORKING GROUP MASSIVE STARS

2008 ◽  
Vol 4 (T27A) ◽  
pp. 236-239
Author(s):  
Stanley P. Owocki ◽  
Paul A. Crowther ◽  
Alexander W. Fullerton ◽  
Gloria Koenigsberger ◽  
Norbert Langer ◽  
...  
Keyword(s):  
Working Group ◽  
Gamma Ray ◽  
Massive Stars ◽  
Gamma Ray Bursts ◽  
Core Collapse ◽  
Hot Stars ◽  
First Stars ◽  
Ob Stars ◽  
Red Supergiants

Our Working Group studies massive, luminous stars, with historical focus on early-type (OB) stars, but extending in recent years to include massive red supergiants that evolve from hot stars. There is also emphasis on the role of massive stars in other branches of astrophysics, particularly regarding starburst galaxies, the first stars, core-collapse gamma-ray bursts, and formation of massive stars.

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