Constraints on cosmological parameters from gamma-ray burst peak photon energy and bolometric fluence measurements and other data
نویسندگان
چکیده
منابع مشابه
High Energy Neutrinos from Cosmological Gamma-Ray Burst Fireballs
Observations suggest that g-ray bursts (GRBs) are produced by the dissipation of the kinetic energy of a relativistic fireball. We show that a large fraction, $10%, of the fireball energy is expected to be converted by photomeson production to a burst of ,1014 eV neutrinos. A km2 neutrino detector would observe at least several tens of events per year correlated with GRBs, and test for neutrino...
متن کاملGamma-ray Burst Peak Duration as a Function of Energy
Gamma-ray burst time histories often consist of many peaks. These peaks tend to be narrower at higher energy. If gamma-ray bursts are cos-mological, the energy dependence of gamma-ray burst time scales must be understood in order to correct the time scale dependence due to the expansion of the universe. By using the average autocorrelation function and the average pulse width, we show that the ...
متن کاملCosmological Parametrization of Gamma Ray Burst Models
Using three parametrizations of the gamma ray burst count data comparison is made to cosmological source models. While simple models can fit 〈V/Vmax〉 and faint end slope constraints, the addition of a logarithmic count range variable describing the curvature of the counts shows that models with no evolution or evolution power law in redshift with index less than 10 fail to satisfy simultaneousl...
متن کاملHigh Energy Cosmic-Rays and Neutrinos from Cosmological Gamma-Ray Burst Fireballs
The recent detection of delayed, low energy emission from Gamma-Ray Burst (GRB) sources confirmed the cosmological origin of the bursts and provided support for models where GRBs are produced by the dissipation of the kinetic energy of relativistic fireballs. In this review, ultrahigh-energy, > 10 eV, cosmic-ray and high energy, ∼ 10 eV, neutrino production in GRBs is discussed in the light of ...
متن کاملConstraints on cosmological parameters from recent measurements of CMB anisotropy
A key prediction of cosmological theories for the origin and evolution of structure in the Universe is the existence of a ‘Doppler peak’ in the angular power spectrum of cosmic microwave background (CMB) fluctuations. We present new results from a study of recent CMB observations which provide the first strong evidence for the existence of a ‘Doppler Peak’ localised in both angular scale and am...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2020
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/staa2779