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Energy Conservation in the Thin Layer Approximation: III. The Spherical Relativistic Case for Supernovae 被引量:1
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作者 Lorenzo Zaninetti 《International Journal of Astronomy and Astrophysics》 2020年第4期285-301,共17页
The theory of the conservation of energy in the thin layer approximation has been extended to special relativity. Four models for the density of the circumstellar medium are analyzed, which are represented by constant... The theory of the conservation of energy in the thin layer approximation has been extended to special relativity. Four models for the density of the circumstellar medium are analyzed, which are represented by constant, power law, exponential and Emden (<em>n</em> = 5) profile for density. The astrophysical results are presented in a numerical way, except for a Taylor expansion of the four trajectories in the surrounding of the origin. The free parameters of the models are particularized for SN1993j, for which the radius versus time is known. Some evaluations on the time dilation are presented. 展开更多
关键词 Supernovae: General Supernovae: individual (sn1993j) ism: Supernova Remnants
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Relativistic Motion with Viscosity: II Stokes’s Law of Resistance 被引量:1
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作者 Lorenzo Zaninetti 《International Journal of Astronomy and Astrophysics》 2021年第4期481-488,共8页
The deduction of a relativistic and mildly relativistic equation of motion in the presence of a drag force proportional to the velocity is presented. The obtained results are used to model the trajectory of the supern... The deduction of a relativistic and mildly relativistic equation of motion in the presence of a drag force proportional to the velocity is presented. The obtained results are used to model the trajectory of the supernova SN1993J and the light curves of gamma-ray bursts. 展开更多
关键词 SUPERNOVAE General Supernovae individual (sn 1993j) ism Supernova Remnants GRB individual (GRB 130427A) GRB individual (GRB 120521C) GRB individual (GRB 130606A)
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Energy Conservation in the Thin Layer Approximation: IV. The Light Curve for Supernovae 被引量:1
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作者 Lorenzo Zaninetti 《International Journal of Astronomy and Astrophysics》 2021年第1期37-58,共22页
The light curves (LC) for Supernova (SN) can be modeled adopting the conversion of the flux of kinetic energy into radiation. This conversion requires an analytical or a numerical law of motion for the expanding radiu... The light curves (LC) for Supernova (SN) can be modeled adopting the conversion of the flux of kinetic energy into radiation. This conversion requires an analytical or a numerical law of motion for the expanding radius of the SN. In the framework of conservation of energy for the thin layer approximation, we present a classical trajectory based on a power law profile for the density, a relativistic trajectory based on the Navarro-Frenk-White profile for the density, and a relativistic trajectory based on a power law behaviour for the swept mass. A detailed simulation of the LC requires the evaluation of the optical depth as a function of time. We modeled the LC of SN 1993J in different astronomical bands, the LC of GRB 050814 and the LC GRB 060729 in the keV region. The time dependence of the magnetic field of equipartition is derived from the theoretical formula for the luminosity. 展开更多
关键词 Supernovae: General Supernovae: (individual: sn1993j) Gamma-Ray Burst: (individual: GRB 050814) Gamma-Ray Burst: (individual: GRB 060729)
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Relativistic Motion with Viscosity. I Newton’s Law of Resistance
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作者 Lorenzo Zaninetti 《International Journal of Astronomy and Astrophysics》 2021年第3期435-444,共10页
The equation of motion for a relativistic neutral particle that moves in a medium characterized by a friction proportional to the square of the velocity is analyzed. The relativistic trajectory is derived in a numeric... The equation of motion for a relativistic neutral particle that moves in a medium characterized by a friction proportional to the square of the velocity is analyzed. The relativistic trajectory is derived in a numerical way and in the form of a Taylor series. The astrophysical applications cover the trajectory of SN 1993J and the light curve of gamma ray bursts. 展开更多
关键词 SUPERNOVAE General SUPERNOVAE (individual: sn1993j) Gamma-Ray Burst (individual: GRB 130427A) Gamma-Ray Burst (individual: GRB 060729)
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