Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Erwin Verwichte"'
Autor:
Martin A. Reiss, Karin Muglach, Emily Mason, Emma E. Davies, Shibaji Chakraborty, Veronique Delouille, Cooper Downs, Tadhg M. Garton, Jeremy A. Grajeda, Amr Hamada, Stephan G. Heinemann, Stefan Hofmeister, Egor Illarionov, Robert Jarolim, Larisza Krista, Chris Lowder, Erwin Verwichte, Charles N. Arge, Laura E. Boucheron, Claire Foullon, Michael S. Kirk, Alexander Kosovichev, Andrew Leisner, Christian Möstl, James Turtle, Astrid Veronig
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 1, p 6 (2024)
Automated detection schemes are nowadays the standard approach for locating coronal holes in extreme-UV images from the Solar Dynamics Observatory (SDO). However, factors such as the noisy nature of solar imagery, instrumental effects, and others mak
Externí odkaz:
https://doaj.org/article/2cb55591754344b8b5e044737b4a0026
Publikováno v:
Entropy, Vol 15, Iss 10, Pp 4520-4539 (2013)
Knowing the three dimensional structure of plasma filaments in the uppermost part of the solar atmosphere, known as coronal loops, and especially their length, is an important parameter in the wave-based diagnostics of this part of the Sun. The combi
Externí odkaz:
https://doaj.org/article/2f4d3d174bdd4cd98099b306b9557329
Autor:
Erwin Verwichte, Simon White
Publikováno v:
Astronomy & Astrophysics. 670:A1
Context. Magnetohydrodynamic (MHD) waves play an important role in the dynamics and heating of the solar corona. Transverse (Alfvénic) oscillations of loops commonly occur in response to solar eruptions and are mostly studied in isolation. However,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be13480846aa950833c5ec95f6189eac
https://doi.org/10.1051/0004-6361/202244873
https://doi.org/10.1051/0004-6361/202244873
We investigate high resolution spectroscopic and imaging observations from the CRisp Imaging SpectroPolarimeter (CRISP) instrument to study the dynamics of chromospheric spicule type events. It is widely accepted that chromospheric fine structures ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29954425f50192a59076967572fd5bb4
http://wrap.warwick.ac.uk/156365/13/WRAP-nature-high-frequency-oscillations-associated-short-lived-spicule-type-events-2021.pdf
http://wrap.warwick.ac.uk/156365/13/WRAP-nature-high-frequency-oscillations-associated-short-lived-spicule-type-events-2021.pdf
Autor:
Marco Stangalini, Mariarita Murabito, Erwin Verwichte, T. Goffrey, Juie Shetye, Ilaria Ermolli, Tony Arber, Fabrizio Giorgi
Publikováno v:
Astronomy & Astrophysics
Vortex structures in the Sun's chromosphere are believed to channel energy between different layers of the solar atmosphere. We investigate the nature and dynamics of two small-scale quiet-Sun rotating structures in the chromosphere. We analyse two c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a4168c546cd67c769545fd2a1b0dcb2
http://wrap.warwick.ac.uk/138738/1/WRAP-Unveiling-magnetic-nature-chromospheric-vortices-2020.pdf
http://wrap.warwick.ac.uk/138738/1/WRAP-Unveiling-magnetic-nature-chromospheric-vortices-2020.pdf
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 633, pp.L6. ⟨10.1051/0004-6361/201937144⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 633, pp.L6. ⟨10.1051/0004-6361/201937144⟩
Torsional Alfv\'en waves are promising candidates for transport of energy across different layers of the solar atmosphere and have been theoretically predicted for decades. Previous detections of Alfv\'en waves so far have however mostly relied on in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::343636903eb9b372761c8849675dac31
http://hdl.handle.net/10852/75655
http://hdl.handle.net/10852/75655
Autor:
Erwin Verwichte, S. J. White
Publikováno v:
Astronomy & Astrophysics. 654:A33
Context. Magnetohydrodynamic (MHD) waves play an important role in the dynamics and heating of the solar corona. Their investigation also reveals information about the local conditions. Transverse (Alfvénic) oscillations of loops commonly occur in r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::972c83ac98faeaf023d036c36cdead36
https://doi.org/10.1051/0004-6361/202141515
https://doi.org/10.1051/0004-6361/202141515
Autor:
Erwin Verwichte, Juie Shetye, Philip G. Judge, J. G. Doyle, Sven Wedemeyer, Eamon Scullion, Tony Arber, Marco Stangalini
Publikováno v:
The Astrophysical Journal
We report observations of small-scale swirls seen in the solar chromosphere. They are typically 2 Mm in diameter and last around 10 minutes. Using spectropolarimetric observations obtained by the CRisp Imaging Spectro-Polarimeter at the Swedish 1 m S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f54c6930dabab1f826c42ab1c6fd419b
http://hdl.handle.net/10852/70551
http://hdl.handle.net/10852/70551
Autor:
Petra Kohutova, Erwin Verwichte
Publikováno v:
Proceedings of the International Astronomical Union. 13:23-25
We present numerical MHD simulations of the dynamics of cool plasma condensations in a coronal loop. We address 2 mechanisms for how coronal rain leads to the excitation of coronal loop oscillations. We find that the combined effect of pressure gradi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c7f0057efe028811ca3969e13e004c6
https://doi.org/10.1017/s1743921317010997
https://doi.org/10.1017/s1743921317010997
Autor:
Petra Kohutova, Erwin Verwichte
Context\ud \ud Coronal rain composed of cool plasma condensations falling from coronal heights is a phenomenon occurring in footpoint-heated coronal loops as a result of thermal instability. High-resolution coronal rain observations suggest that cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f24ec03d3b60a0acba17dd85b16f4d5
http://wrap.warwick.ac.uk/87485/7/WRAP-dynamics-plasma-condensations-gravitationally-loop-Verwichte-2018.pdf
http://wrap.warwick.ac.uk/87485/7/WRAP-dynamics-plasma-condensations-gravitationally-loop-Verwichte-2018.pdf