Zobrazeno 1 - 10
of 582
pro vyhledávání: '"PRASAD, S. KRISHNA"'
The multi-wavelength data from the Solar Dynamics Observatory (SDO) is extensively used in studying the physics of the Sun and its atmosphere. In this study, we estimate the formation heights of low-corona and chromospheric channels of the Atmospheri
Externí odkaz:
http://arxiv.org/abs/2409.10451
We study the propagation properties of slow magneto-acoustic waves in a multi-thermal coronal loop using a 3D MHD model, for the first time. A bundle of 33 vertical cylinders, each of 100{\,}km radius, randomly distributed over a circular region of r
Externí odkaz:
http://arxiv.org/abs/2406.03093
Autor:
Sieyra, M. V., Prasad, S. Krishna, Stenborg, G., Khomenko, E., Van Doorsselaere, T., Costa, A., Esquivel, A., Riedl, J. M.
Publikováno v:
A&A 667, A21 (2022)
Recurrent, arc-shaped intensity disturbances were detected by EUV channels in an active region. The fronts were observed to propagate along a coronal loop bundle rooted in a small area within a sunspot umbra. Previous works have linked these intensit
Externí odkaz:
http://arxiv.org/abs/2208.10857
Autor:
Anfinogentov, Sergey A., Antolin, Patrick, Inglis, Andrew R., Kolotkov, Dmitrii, Kupriyanova, Elena G., McLaughlin, James A., Nisticò, Giuseppe, Pascoe, David J., Prasad, S. Krishna, Yuan, Ding
We review novel data analysis techniques developed or adapted for the field of coronal seismology. We focus on methods from the last ten years that were developed for extreme ultraviolet (EUV) imaging observations of the solar corona, as well as for
Externí odkaz:
http://arxiv.org/abs/2112.13577
Employing high-resolution EUV imaging observations from SDO/AIA, we analyse a compressive plasma oscillation in a hot coronal loop triggered by a C-class flare near one of its foot points as first studied by Kumar et al. We investigate the oscillatio
Externí odkaz:
http://arxiv.org/abs/2104.12038
Autor:
Banerjee, D., Prasad, S. Krishna, Pant, V., McLaughlin, J. A., Antolin, P., Magyar, N., Ofman, L., Tian, H., Van Doorsselaere, T., De Moortel, I., Wang, T.
Modern observatories have revealed the ubiquitous presence of magnetohydrodynamic waves in the solar corona. The propagating waves (in contrast to the standing waves) are usually originated in the lower solar atmosphere which makes them particularly
Externí odkaz:
http://arxiv.org/abs/2012.08802
Publikováno v:
A&A 640, A120 (2020)
Downflows with high velocities occur in the transition region above many sunspots; however, how these signatures evolve over short time-scales in both spatial and spectral terms is still unknown. In this article, we investigate the evolution of downf
Externí odkaz:
http://arxiv.org/abs/2006.13617
Publikováno v:
A&A 636, A35 (2020)
Super-sonic downflows have been observed in transition region spectra above numerous sunspots; however, little research has been conducted to date into how persistent these signatures are within sunspots on time-scales longer than a few hours. Here,
Externí odkaz:
http://arxiv.org/abs/2003.02489
The rapid damping of slow magnetoacoustic waves in the solar corona has been extensively studied in previous years. Most studies suggest that thermal conduction is a dominant contributor to this damping, albeit with a few exceptions. Employing extrem
Externí odkaz:
http://arxiv.org/abs/1908.00384
Autor:
Quinn, Sean, Reid, Aaron, Mathioudakis, Mihalis, Nelson, Christopher, Prasad, S. Krishna, Zharkov, Sergei
Active region NOAA 12673 was extremely volatile in 2017 September, producing many solar flares, including the largest of solar cycle 24, an X9.3 flare of 06 September 2017. It has been reported that this flare produced a number of sunquakes along the
Externí odkaz:
http://arxiv.org/abs/1906.08545