Speaker
Description
This study investigates the time delays (∆t) in the arrival times of photons with different frequencies from multiple Gamma-Ray Burst (GRB) events, using a novel Linear Frequency Dependent Speed of Light (LFDSL) model developed from Maxwell’s equations, dispersion effects and plasma physics. The delays are hypothesized to arise from the interaction between photons and the electrons in a rarefied cosmic plasma medium, causing dispersion and inverse frequency-dependent variations in the speed of light by the relation: ∆t = K∆ν−1, as opposed to the traditional assumption of a non-zero photon mass and plasma effect which varies by the relation: ∆t = K∆ν−2. Through regression analysis and model refinement, this work improves upon earlier studies by accounting for the non-simultaneous emission of photons, leading to stronger correlations between time delays and photon frequencies. By applying this model to four key GRBs namely (GRB 030329, 980425, 000418, and 021004), we derive the frequency equivalence of the interstellar medium’s conductance (ν∗ ≈ 1.507 ± 0.0009 Hz), estimate spatial dimensions of the internal and external shock wave from the GRB jets and calculate independent distance measures wherein we obtain average distances to our individual GRB events. Based on the observed time delays, the model’s outcomes also reveal a coherent photon mass, mγ = (1.584 ± 0.009) × 10−37 kg). These findings support two GRB models—the fireball and multiple shock wave models—offering new insights into GRB jet dynamics and photon mass, providing a foundation for future studies on GRB afterglows and relativistic outflows.
| Stream | Science |
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