Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Wang, Tongjiang"'
Publikováno v:
Solar Physics (2024) 299, 37
Recent observations of reflected propagating and standing slow-mode waves in hot flaring coronal loops have spurred our investigation into their underlying excitation and damping mechanisms. To understand these processes, we conduct 2.5D magnetohydro
Externí odkaz:
http://arxiv.org/abs/2403.02464
Autor:
Xia, Fanxiaoyu, Wang, Tongjiang, Su, Yang, Zhao, Jie, Zhang, Qingmin, Veronig, Astrid M., Gan, Weiqun
We present a detailed analysis of a reflecting intensity perturbation in a large coronal loop that appeared as sloshing oscillation and lasted for at least one and a half periods. The perturbation is initiated by a microflare at one footpoint of the
Externí odkaz:
http://arxiv.org/abs/2208.10029
We analyse the phase shifts of standing, slow magnetohydrodynamic (MHD) waves in solar coronal loops using a linear MHD model taking into account the role of thermal conductivity, compressive viscosity, radiative losses, and heating-cooling misbalanc
Externí odkaz:
http://arxiv.org/abs/2112.04995
Autor:
Ofman, Leon, Wang, Tongjiang
Slow magnetosonic waves associated with flares were observed in coronal loops by SOHO/SUMER, SDO/AIA in various EUV bandpasses, and other instruments. The excitation and damping of slow magnetosonic waves provides information on the magnetic, tempera
Externí odkaz:
http://arxiv.org/abs/2111.10696
Publikováno v:
Solar Physics, 296, 105 (2021)
We study phase shifts of the propagating slow waves in coronal loops invoking the effects of thermal conductivity, compressive viscosity, radiative losses and heating-cooling imbalance. We derive a general dispersion relation and solve it to determin
Externí odkaz:
http://arxiv.org/abs/2104.07604
Autor:
Wang, Tongjiang, Ofman, Leon, Yuan, Ding, Reale, Fabio, Kolotkov, Dmitrii Y., Srivastava, Abhishek K.
Publikováno v:
Space Sci Rev (2021) 217:34
Rapidly decaying long-period oscillations often occur in hot coronal loops of active regions associated with small (or micro-) flares. This kind of wave activity was first discovered with the SOHO/SUMER spectrometer from Doppler velocity measurements
Externí odkaz:
http://arxiv.org/abs/2102.11376
Autor:
Aschwanden, Markus J., Wang, Tongjiang
Publikováno v:
(2020), ApJ 891:99
We report the discovery of torsional Alfv\'enic oscillations in solar flares, which modulate the time evolution of the magnetic free energy $E_f(t)$, while the magnetic potential energy $E_p(t)$ is uncorrelated, and the nonpotential energy varies as
Externí odkaz:
http://arxiv.org/abs/2001.10103
Autor:
Wang, Tongjiang, Ofman, Leon
Publikováno v:
ApJ, 886, 2 (2019)
Recent studies of a flaring loop oscillation event on 2013 December 28 observed by the Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO) have revealed the suppression of thermal conduction and significant enhancement of compr
Externí odkaz:
http://arxiv.org/abs/1909.10910
Standing slow-mode waves have been recently observed in flaring loops by the Atmospheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO). By means of the coronal seismology technique transport coefficients in hot ($\sim$10 MK) plasma w
Externí odkaz:
http://arxiv.org/abs/1805.03282
Autor:
Wang, Tongjiang
Publikováno v:
Geophysical Monograph Series, Vol. 216. ISBN: 978-1-119-05495-5. Wiley, 2016, p.395-418
Recent observations have revealed the ubiquitous presence of magnetohydrodynamic (MHD) waves and oscillations in the solar corona. The aim of this review is to present recent progress in the observational study of four types of wave (or oscillation)
Externí odkaz:
http://arxiv.org/abs/1803.11329