| Autor: |
Tian-Le Zhao, Xiao-Feng Li, Ze-Yuan Tang, Rajiv Kumar |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
The Astrophysical Journal, Vol 970, Iss 2, p 157 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1538-4357 |
| DOI: |
10.3847/1538-4357/ad5d58 |
| Popis: |
Sgr A* often shows bright, episodic flares observationally, but the mechanism of the flares' intermittent brightening is not very clear. Many people believe the flares may be formed by the nonthermal particles, which can be a consequence of the magnetic reconnection and shock waves. In this work, we use the larger magnetic loop in the presence of pseudo-Newtonian potential, which mimics general relativistic effects. The simulation results show that the reconnection of magnetic field lines passes through a current sheet, which bifurcates into two pairs of slow shocks. We also find the shock waves heat the plasma, especially when the plasma density is low. The shock wave heating effect by the magnetic reconnection is confirmed by the simulation results, and thus the process of instantaneous brightening of the flares on the accretion disk can be explained. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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