تقرير
Vortical amplification of magnetic field at inward shock of supernova remnant Cassiopeia A
| العنوان: | Vortical amplification of magnetic field at inward shock of supernova remnant Cassiopeia A |
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| المؤلفون: | Fraschetti, F., Katsuda, S., Sato, T., Jokipii, J. R., Giacalone, J. |
| المصدر: | Phys. Rev. Lett. 120, 251101 (2018) |
| سنة النشر: | 2018 |
| المجموعة: | Astrophysics Physics (Other) |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics, Physics - Plasma Physics |
| الوصف: | We present an interpretation of the time variability of the $X$-ray flux recently reported from a multi-epoch campaign of $15$ years observations of the supernova remnant Cassiopeia A by {\it Chandra}. We show for the first time quantitatively that the $[4.2-6]$ keV non-thermal flux increase up to $50\%$ traces the growth of the magnetic field due to vortical amplification mechanism at a reflection inward shock colliding with inner overdensities. The fast synchrotron cooling as compared with shock-acceleration time scale qualitatively supports the flux decrease. Comment: 5 pages, 2 figures, PRL in press |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.120.251101 |
| URL الوصول: | http://arxiv.org/abs/1805.05951 |
| رقم الأكسشن: | edsarx.1805.05951 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.120.251101 |
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