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Magnetar Fireballs and Short Bursts: Curved Spacetime Lensing, Quantum Electrodynamical Effects, Spectra, Polarization, and Impulse Responses

  • Authors: Zorawar Wadiasingh, Hoa Dinh Thi, Constantinos Kalapotharakos, Kun Hu, Matthew G. Baring, Alice K. Harding, George Younes, Sebastien Guillot, Andrea Sanna, Michela Negro, Jeremy D. Schnittman, Oliver J. Roberts, Eric Burns, Chin-Ping Hu, Ersin Göğüş

Zorawar Wadiasingh et al 2026 The Astrophysical Journal Supplement Series 286 .

  • Provider: AAS Journals

Caption: Figure 5.

Energy-dependent polarization angle transport with and without VB for three near-pole-on geometries (rows) for B = 10, M = 1.7 M and r = 12 km with viewing angles of θv = {5°, 15°, 30°} (top to bottom). In each row, the first column shows ﹩\hat{{\boldsymbol{k}}}\cdot {\hat{n}}_{{ \mathcal S }}﹩ and the second shows ﹩\cos 2\chi ﹩ with VB disabled. The remaining columns show ﹩\cos 2\chi ﹩ with VB enabled at 0.1, 1, 10, and 100 keV. Comparing columns within each row demonstrates how adiabatic VB reorganizes polarization angle structure in a strongly energy-dependent manner for polar viewing angles, approaching the VB-off case at low energies and on-axis views. The color scale indicates ﹩\cos 2\chi ﹩ at the IP, along with a random sample of overlaid polarization angle vectors. As the VB polarization recoupling radius becomes large compared to the emission region, the polarization vectors become more aligned (bottom row panels).

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