Zobrazeno 1 - 10
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pro vyhledávání: '"Karampelas A."'
Context. In the coronal open-field regions, such as coronal holes, there are many transverse waves propagating along magnetic flux tubes, generally interpreted as kink waves. Previous studies have highlighted their potential in coronal heating, solar
Externí odkaz:
http://arxiv.org/abs/2406.19474
Autor:
Karampelas, Konstantinos, Van Doorsselaere, Tom, Guo, Mingzhe, Duckenfield, Timothy, Pelouze, Gabriel
Instabilities in oscillating loops are believed to be essential for dissipating the wave energy and heating the solar coronal plasma. Our aim is to study the development of the Kelvin-Helmholtz (KH) instability in an oscillating loop that is driven b
Externí odkaz:
http://arxiv.org/abs/2406.11700
Publikováno v:
A&A 681, L6 (2024)
Aims. We studied the manifestation of decayless oscillations in 3D simulations of coronal loops, driven by random motions. Methods. Using the PLUTO code, we ran magnetohydrodynamic (MHD) simulations of a straight gravitationally stratified flux tube,
Externí odkaz:
http://arxiv.org/abs/2401.01095
Autor:
Guo, Mingzhe, Duckenfield, Timothy, Van Doorsselaere, Tom, Karampelas, Konstantinos, Pelouze, Gabriel, gao, Yuhang
We model a coronal loop as a three-dimensional magnetic cylinder in a realistic solar atmosphere that extends from the chromosphere to the corona. Kink oscillations, believed ubiquitous in the solar corona, are launched in the loop. Heating is expect
Externí odkaz:
http://arxiv.org/abs/2305.03621
Autor:
Pelouze, Gabriel, Van Doorsselaere, Tom, Karampelas, Konstantinos, Riedl, Julia M., Duckenfield, Timothy
Publikováno v:
A&A 672, A105 (2023)
Context. Transverse oscillations are ubiquitously observed in the solar corona, both in coronal loops and open magnetic flux tubes. Numerical simulations suggest that their dissipation could heat coronal loops, counterbalancing radiative losses. Thes
Externí odkaz:
http://arxiv.org/abs/2301.03100
Oscillatory reconnection is a relaxation process in magnetised plasma, with an inherent periodicity that is exclusively dependent on the properties of the background plasma. This study focuses on the seismological prospects of oscillatory reconnectio
Externí odkaz:
http://arxiv.org/abs/2301.02452
Autor:
Daniela Raccanello, Roberto Burro, Aleksander Aristovnik, Dejan Ravšelj, Lan Umek, Giada Vicentini, Rob Hall, Chiara Buizza, Muhammad Ayub Buzdar, Surobhi Chatterjee, Nicola Cucari, Beata Dobrowolska, Ana Teresa Ferreira-Oliveira, Thais França, Alberto Ghilardi, Fany Inasius, Sujita Kumar Kar, Konstantinos Karampelas, Andrii Kuzyshyn, Florin Lazăr, Juan D. Machin-Mastromatteo, Maria Malliarou, Bertil P. Marques, Silvia Mariela Méndez-Prado, Cristina Mollica, Alka Obadić, Olawale Festus Olaniyan, Ana Sofia Rodrigues, Giulio Sbravati, Aleksandra Vasić, Ana-Maria Zamfir, Nina Tomaževič
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Abstract Trauma scientists have raised the alarm about the devastating consequences of the Ukraine war on mental health. We examined how higher education students—as indirect victims—coped with this conflict and how they emotionally reacted durin
Externí odkaz:
https://doaj.org/article/5c8d6df28b7f4c9ba09d7db137b053cb
Autor:
Delaunay, Aurélien1 a.delaunay@lfg.paris, Karampelas, Stefanos1, Herreweghe, Annabelle1, Fritsch, Emmanuel2
Publikováno v:
Journal of Gemmology. 2024, Vol. 39 Issue 3, p270-275. 6p.
Oscillatory reconnection can manifest through the interaction between the ubiquitous MHD waves and omnipresent null points in the solar atmosphere and is characterized by an inherent periodicity. In the current study, we focus on the relationship bet
Externí odkaz:
http://arxiv.org/abs/2207.01980
Autor:
Sokolovsky K., Bonanos A., Gavras P., Yang M., Hatzidimitriou D., Moretti M.I., Karampelas A., Bellas-Velidis I., Spetsieri Z., Pouliasis E., Georgantopoulos I., Charmandaris V., Tsinganos K., Laskaris N., Kakaletris G., Nota A., Lennon D., Arviset C., Whitmore B., Budavari T., Downes R., Lubow S., Rest A., Strolger L., White R.
Publikováno v:
EPJ Web of Conferences, Vol 152, p 02005 (2017)
We aim to construct an exceptionally deep (V ≲ 27) catalog of variable objects in selected Galactic and extragalactic fields visited multiple times by the Hubble Space Telescope (HST). While HST observations of some of these fields were searched fo
Externí odkaz:
https://doaj.org/article/58fd053d631a4420a5b3ab753f29f080