Luminosity Correlations for Gamma-Ray Bursts and Implications for Their Prompt and Afterglow Emission Mechanisms

Sultana, Joseph; Kazanas, Demosthenes; Fukumura, Keigo

doi:10.1088/0004-637x/758/1/32

Cited by 22 publications

(27 citation statements)

References 46 publications

(97 reference statements)

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“…In such a way, (12) and (13) allow retrieving the observed peak -lag relation. Finally, the analogous correlation coefficients and best-fit slopes of the peak -lag and - * correlations obtained by Sultana et al [129] seem to hint toward a similar origin for these two relations.…”

Section: Physicalsupporting

confidence: 71%

“…Another explanation for the origin of the peak -lag relation, given by Sultana et al [129], involves only kinematic effects. In this case, peak and lag depend on the quantity:…”

Section: Physicalmentioning

confidence: 98%

“…Afterwards, Sultana et al [129] presented a relation between the -and -corrected lag for the Swift energy bands 50-100 keV and 100-200 keV, and peak , for a subset of 12 Swift long GRBs. The -correction takes into account the time dilatation effect by multiplying the observed lag by (1 + ) −1 to translate it into the rest frame.…”

Section: The -Correlationmentioning

confidence: 99%

“…In addition, Sultana et al [129] demonstrated that this correlation in the prompt phase can be extrapolated into the - * relation [131][132][133][134]. Sultana et al [129] found the following (Note that Sultana et al [129] used iso to denote the peak isotropic luminosity. ): …”

Section: The -Correlationmentioning

confidence: 99%

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Gamma-Ray Burst Prompt Correlations

Dainotti

Vecchio

Tarnopolski

2018

Advances in Astronomy

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The mechanism responsible for the prompt emission of gamma-ray bursts (GRBs) is still a debated issue. The prompt phase-related GRB correlations can allow discriminating among the most plausible theoretical models explaining this emission. We present an overview of the observational two-parameter correlations, their physical interpretations, and their use as redshift estimators and possibly as cosmological tools. The nowadays challenge is to make GRBs, the farthest stellar-scaled objects observed (up to redshift = 9.4), standard candles through well established and robust correlations. However, GRBs spanning several orders of magnitude in their energetics are far from being standard candles. We describe the advances in the prompt correlation research in the past decades, with particular focus paid to the discoveries in the last 20 years.

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Section: Physicalsupporting

confidence: 71%

“…Another explanation for the origin of the peak -lag relation, given by Sultana et al [129], involves only kinematic effects. In this case, peak and lag depend on the quantity:…”

Section: Physicalmentioning

confidence: 98%

Section: The -Correlationmentioning

confidence: 99%

Section: The -Correlationmentioning

confidence: 99%

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Gamma-Ray Burst Prompt Correlations

Dainotti

Vecchio

Tarnopolski

2018

Advances in Astronomy

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“…3 and Table 2. Similar to , also Bernardini et al (2012a) and Sultana et al (2012), with a sample of 64 and 14…”

Section: +019mentioning

confidence: 75%

Gamma Ray Burst afterglow and prompt-afterglow relations: An overview

Dainotti

Vecchio

2017

New Astronomy Reviews

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The mechanism responsible for the afterglow emission of Gamma Ray Bursts (GRBs) and its connection to the prompt γ-ray emission is still a debated issue. Relations between intrinsic properties of the prompt or afterglow emission can help to discriminate between plausible theoretical models of GRB production. Here we present an overview of the afterglow and prompt-afterglow two parameter relations, their physical interpretations, their use as redshift estimators and as possible cosmological tools. A similar task has already been correctly achieved for Supernovae (SNe) Ia by using the peak magnitude-stretch relation, known in the literature as the Phillips relation (Phillips 1993). The challenge today is to make GRBs, which are amongst the farthest objects ever observed, standardizable candles as the SNe Ia through well established and robust relations. Thus, the study of relations amongst the observable and physical properties of GRBs is highly relevant together with selection biases in their physical quantities. Therefore, we describe the state of the art of the existing GRB relations, their possible and debated interpretations in view of the current theoretical models and how relations are corrected for selection biases. We conclude that only after an appropriate evaluation and correction for selection effects can GRB relations be used to discriminate among the theoretical models responsible for the prompt and afterglow emission and to estimate cosmological parameters.

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Determination of cosmological parameters from gamma ray burst characteristics and afterglow correlations

Zitouni

Guessoum

Azzam

2016

Astrophys Space Sci

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We use the correlation relation between the energy emitted by the GRBs in their prompt phases and the X-ray afterglow fluxes, in an effort to constrain cosmological parameters and aiming to construct a Hubble diagram at high redshifts, i.e. beyond those found with Type Ia supernovae.We use a sample of 126 Swift GRBs, that we have selected among more than 800 long bursts observed until April 2015. The selection is based on a few observational constraints: GRB flux higher than 0.4 photons/cm 2 /s in the band 15-150 keV; spectrum fitted with simple power law; redshift accurately known and given; and X-ray afterglow observed and flux measured.The statistical method of maximum likelihood is then used to determine the best cosmological parameters (Ω M , Ω Λ ) that give the best correlation for two relations: a) the Amati relation (between intrinsic spectral peak energy E p,i and the equivalent isotropic energy); b) the Dainotti relation, namely between the Xray afterglow luminosity L X and the break time T a , which is observed in the X-ray flux FX.Although the number of GRBs with high redshifts is rather small, and despite the notable dispersion found in the data, the results we have obtained are quite encouraging and promising. The results obtained using the Amati relation are close to those obtained using the Type Ia supernovae, and they appear to indicate a universe dominated by dark energy. However, those obtained with the correlation between the break time and the X-ray afterglow luminosity is consistent with the findings of the WMAP study of the cosmic microwave background radiation, and they seem to indicate a de Sitter-Einstein universe dominated by matter.

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Luminosity Correlations for Gamma-Ray Bursts and Implications for Their Prompt and Afterglow Emission Mechanisms

Cited by 22 publications

References 46 publications

Gamma-Ray Burst Prompt Correlations

Gamma-Ray Burst Prompt Correlations

Gamma Ray Burst afterglow and prompt-afterglow relations: An overview

Determination of cosmological parameters from gamma ray burst characteristics and afterglow correlations

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