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Relevant bibliographies by topics / Poynting flux dominated outflow

Academic literature on the topic 'Poynting flux dominated outflow'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Dissertations / Theses
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Journal articles on the topic "Poynting flux dominated outflow"

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Gao, Wei-Hong. "SWIFT J164449.3+573451: A PLUNGING EVENT WITH A POYNTING-FLUX-DOMINATED OUTFLOW." Astrophysical Journal 761, no. 2 (December 3, 2012): 113. http://dx.doi.org/10.1088/0004-637x/761/2/113.

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Kirk, John G., and Gwenael Giacinti. "Inductive Acceleration of Ions in Poynting-flux-dominated Outflows." Astrophysical Journal 884, no. 1 (October 11, 2019): 62. http://dx.doi.org/10.3847/1538-4357/ab3c61.

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Zhang, B. B., B. Zhang, A. J. Castro-Tirado, Z. G. Dai, P. H. T. Tam, X. Y. Wang, Y. D. Hu, et al. "Transition from fireball to Poynting-flux-dominated outflow in the three-episode GRB 160625B." Nature Astronomy 2, no. 1 (November 20, 2017): 69–75. http://dx.doi.org/10.1038/s41550-017-0309-8.

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Meng, Yan-Zhi, Jin-Jun Geng, and Xue-Feng Wu. "The photosphere emission spectrum of hybrid relativistic outflow for gamma-ray bursts." Monthly Notices of the Royal Astronomical Society 509, no. 4 (November 3, 2021): 6047–58. http://dx.doi.org/10.1093/mnras/stab3132.

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ABSTRACT The photospheric emission in the prompt phase is the natural prediction of the original fireball model for gamma-ray burst (GRB) due to the large optical depth (τ > 1) at the base of the outflow, which is supported by the quasi-thermal components detected in several Fermi GRBs. However, which radiation mechanism (photosphere or synchrotron) dominates in most GRB spectra is still under hot debate. The shape of the observed photosphere spectrum from a pure hot fireball or a pure Poynting-flux-dominated outflow has been investigated before. In this work, we further study the photosphere spectrum from a hybrid outflow containing both a thermal component and a magnetic component with moderate magnetization (σ0 = LP/LTh ∼ 1 − 10), by invoking the probability photosphere model. The high-energy spectrum from such a hybrid outflow is a power law rather than an exponential cutoff, which is compatible with the observed Band function in a great amount of GRBs. Also, the distribution of the low-energy indices (corresponding to the peak-flux spectra) is found to be quite consistent with the statistical result for the peak-flux spectra of GRBs best-fitted by the Band function, with similar angular profiles of structured jet in our previous works. Finally, the observed distribution of the high-energy indices can be well understood after considering the different magnetic acceleration (due to magnetic reconnection and kink instability) and the angular profiles of dimensionless entropy with the narrower core.

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Zhang, B. B., B. Zhang, A. J. Castro-Tirado, Z. G. Dai, P. H. T. Tam, X. Y. Wang, Y. D. Hu, et al. "Publisher Correction: Transition from fireball to Poynting-flux-dominated outflow in the three-episode GRB 160625B." Nature Astronomy 2, no. 3 (January 31, 2018): 258. http://dx.doi.org/10.1038/s41550-018-0387-2.

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BARKOV, M. V., and S. S. KOMISSAROV. "MAGNETIC ACCELERATION OF ULTRARELATIVISTIC GRB AND AGN JETS." International Journal of Modern Physics D 17, no. 10 (September 2008): 1669–75. http://dx.doi.org/10.1142/s0218271808013285.

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We present numerical simulations of cold, axisymmetric, magnetically driven relativistic outflows. The outflows are initially sub-Alfvénic and Poynting-flux dominated, with total–to–rest-mass energy flux ratio up to μ ~ 620. To study the magnetic acceleration of jets we simulate flows confined within a funnel with a rigid wall of prescribed shape, which we take to be z ∝ ra (in cylindrical coordinates, with a ranging from 1 to 2). This allows us to eliminate the numerical dissipative effects induced by a free boundary with an ambient medium. We find that in all cases they converge to a steady state characterized by a spatially extended acceleration region. For the jet solutions the acceleration process is very efficient — on the outermost scale of the simulation more than half of the Poynting flux has been converted into kinetic energy flux, and the terminal Lorentz factor approached its maximum possible value (Γ∞ ≃ μ). The acceleration is accompanied by the collimation of magnetic field lines in excess of that dictated by the funnel shape. The numerical solutions are generally consistent with the semi-analytic self-similar jets solutions and the spatially extended acceleration observed in some astrophysical relativistic jets. In agreement with previous studies, we also find that the acceleration is significantly less effective for wind solutions suggesting that pulsar winds may remain Poynting dominated when they reach the termination shock.

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Li, Liang. "Multipulse Fermi Gamma-Ray Bursts. I. Evidence of the Transition from Fireball to Poynting-flux-dominated Outflow." Astrophysical Journal Supplement Series 242, no. 2 (May 31, 2019): 16. http://dx.doi.org/10.3847/1538-4365/ab1b78.

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Birn, J., and M. Hesse. "Reconnection in substorms and solar flares: analogies and differences." Annales Geophysicae 27, no. 3 (March 4, 2009): 1067–78. http://dx.doi.org/10.5194/angeo-27-1067-2009.

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Abstract. Magnetic reconnection is the crucial process in the release of magnetic energy associated with magnetospheric substorms and with solar flares. On the basis of three-dimensional resistive MHD simulations we investigate similarities and differences between the two scenarios. We address in particular mechanisms that lead to the onset of reconnection and energy release, transport, and conversion mechanisms. Analogous processes might exist in the motion of field line footpoints on the sun and in magnetic flux addition to the magnetotail. In both cases such processes might lead to a loss of neighboring equilibrium, characterized by the formation of a very thin embedded current sheet, which acts as trigger for reconnection. We find that Joule (or ohmic) dissipation plays only a minor role in the overall energy transfer associated with reconnection. The dominant transfer of released magnetic energy occurs to electromagnetic energy (Poynting) flux and to thermal energy transport as enthalpy flux. The former dominates in low-beta, specifically initially force-free current sheets expected for the solar corona, while the latter dominates in high-beta current sheets, such as the magnetotail. In both cases the outflow from the reconnection site becomes bursty, i.e. spatially and temporally localized, yet carrying most of the outflow energy. Hence an analogy might exist between bursty bulk flows (BBFs) in the magnetotail and pulses of Poynting flux in solar flares. Further similarities might exist in the role of collapsing magnetic flux tubes, as a consequence of reconnection, in the heating and acceleration of charged particles.

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Deng (邓巍), Wei, Hui Li (李晖), Bing Zhang (张冰), and Shengtai Li (李胜台). "RELATIVISTIC MHD SIMULATIONS OF COLLISION-INDUCED MAGNETIC DISSIPATION IN POYNTING-FLUX-DOMINATED JETS/OUTFLOWS." Astrophysical Journal 805, no. 2 (May 29, 2015): 163. http://dx.doi.org/10.1088/0004-637x/805/2/163.

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Siddique, Iqra, Saeeda Sajjad, and Khadeejah Motiwala. "The Prompt Emission of GRB 130518A and the Study of Its Outflow through Hybrid Jet Models." Astrophysical Journal 938, no. 2 (October 1, 2022): 159. http://dx.doi.org/10.3847/1538-4357/ac8d05.

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Abstract The nature of the prompt emission mechanism in gamma-ray bursts (GRBs) remains uncertain to date. This question is also tied to the composition of the jet: thermal, Poynting flux dominated or hybrid with both types of components. In this work, we aim to study these questions in the context of GRB 130518A. By analysing its prompt emission data from the Fermi Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT), we find that the time-integrated spectrum has a nonthermal component along with a subdominant blackbody component. We use these results to study the properties of the jet in various scenarios through the frameworks developed by Hascoët et al. and Gao & Zhang. Both frameworks exclude the pure fireball model for this GRB. In all other cases, the initial magnetic fraction is greater than the thermal fraction. For small launching radii of the jet, the favored nonthermal emission process is internal shocks. Magnetic reconnection seems likely only for very large initial radii.

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Dissertations / Theses on the topic "Poynting flux dominated outflow"

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Mochol, Iwona [Verfasser], and John G. [Akademischer Betreuer] Kirk. "Nonlinear waves in Poynting-flux dominated outflows / Iwona Mochol ; Betreuer: John G. Kirk." Heidelberg : Universitätsbibliothek Heidelberg, 2012. http://d-nb.info/1177040042/34.

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Conference papers on the topic "Poynting flux dominated outflow"

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Sikora, Marek. "Are Quasar Jets Matter or Poynting Flux Dominated?" In ASTROPHYSICAL SOURCES OF HIGH ENERGY PARTICLES AND RADIATION. AIP, 2005. http://dx.doi.org/10.1063/1.2141855.

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Bégué, Damien. "Poynting flux dominated jets challenged by their photospheric emission." In THE SECOND ICRANET CÉSAR LATTES MEETING: Supernovae, Neutron Stars and Black Holes. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4937216.

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Giannios, Dimitrios. "The role of kink instability in Poynting-flux dominated jets." In RECENT ADVANCES IN ASTRONOMY AND ASTROPHYSICS: 7th International Conference of the Hellenic Astronomical Society. AIP, 2006. http://dx.doi.org/10.1063/1.2348028.

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Rodriguez-Ramirez, Juan Carlos, Elisabete Maria de Gouveia Dal Pino, Rafael Alves Batista, and Pankaj Kushwaha. "Electromagnetic and Neutrino Output from Magnetic Reconnection in Poynting Flux Dominated Jets." In 37th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.395.1016.

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Rau, Matthew J., Tianqi Guo, Pavlos P. Vlachos, and Suresh V. Garimella. "Visualization of Confined Jet Impingement With Boiling Using Time-Resolved Stereo-PIV." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48184.

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Two-phase liquid-vapor flow field measurements of confined jet impingement with boiling are performed using time-resolved stereo particle image velocimetry (stereo-PIV). A single circular jet of water, impinges normally from a 3.75 mm-diameter orifice onto a submerged circular heat source at an orifice-to-target spacing of 4 jet diameters. The impinging jet outflow including the vapor generated at the heat source are confined between the jet orifice plate and the bottom test section wall. Fluorescent seeding particles (10 μm in diameter) and time-resolved PIV measurements (taken at a sampling rate of 750 Hz) allow for imaging of the instantaneous interactions between the liquid and vapor structures. Liquid-phase velocity vectors within the two-phase flow field (with high vapor fractions) are presented as a function of heat flux at jet Reynolds numbers of 5,000 and 15,000 and contrasted with single-phase flow. The time-resolved measurements are used to highlight the influence of the vapor phase on the liquid flow field. It is found that bubble formation effectively blocks the developing wall-jet flow on the heated surface. The resulting liquid flow field in the confinement gap is dominated by vapor motion rather than by the entrainment from the developing wall jet.

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Reports on the topic "Poynting flux dominated outflow"

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Sikora, M. Are Quasar Jets Dominated by Poynting Flux? Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/839767.

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