Zobrazeno 1 - 10
of 51
pro vyhledávání: '"P. H. Keys"'
Autor:
W. Bate, D. B. Jess, S. D. T. Grant, A. Hillier, S. J. Skirvin, T. Van Doorsselaere, S. Jafarzadeh, T. Wiegelmann, T. Duckenfield, C. Beck, T. Moore, M. Stangalini, P. H. Keys, D. J. Christian
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 66 (2024)
The magnetic geometry of the solar atmosphere, combined with projection effects, makes it difficult to accurately map the propagation of ubiquitous waves in fibrillar structures. These waves are of interest due to their ability to carry energy into t
Externí odkaz:
https://doaj.org/article/7554c284cf7747b58802f393fa337636
Autor:
Ryan J. Campbell, P. H. Keys, M. Mathioudakis, F. Wöger, T. Schad, A. Tritschler, A. G. de Wijn, H. N. Smitha, C. Beck, D. J. Christian, D. B. Jess, R. Erdélyi
Publikováno v:
The Astrophysical Journal Letters, Vol 955, Iss 2, p L36 (2023)
We present the first quiet Sun spectropolarimetric observations obtained with the Visible SpectroPolarimeter at the 4 m Daniel K. Inouye Solar Telescope. We recorded observations in a wavelength range that includes the magnetically sensitive Fe i 630
Externí odkaz:
https://doaj.org/article/c97592f3c90a420bb0a5dcc327407c47
Autor:
M. Stangalini, G. Verth, V. Fedun, A. A. Aldhafeeri, D. B. Jess, S. Jafarzadeh, P. H. Keys, B. Fleck, J. Terradas, M. Murabito, I. Ermolli, R. Soler, F. Giorgi, C. D. MacBride
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Co-existence of several magnetohydrodynamic oscillations modes on the Sun were predicted earlier. Here, the authors show large-scale coherent oscillations in a sunspot, with a spectrum different than solar global acoustic oscillations, incorporating
Externí odkaz:
https://doaj.org/article/952e2ef171e14b3699ab21cb2b338433
Autor:
S. D. T. Grant, D. B. Jess, M. Stangalini, S. Jafarzadeh, V. Fedun, G. Verth, P. H. Keys, S. P. Rajaguru, H. Uitenbroek, C. D. MacBride, W. Bate, C. A. Gilchrist-Millar
Publikováno v:
Grant, S D T, Jess, D B, Stangalini, M, Jafarzadeh, S, Fedun, V, Verth, G, Keys, P H, Rajaguru, S P, Uitenbroek, H, MacBride, C D, Bate, W & Gilchrist-Millar, C A 2022, ' The propagation of coherent waves across multiple solar magnetic pores ', The Astrophysical Journal, vol. 938, no. 2, 143 . https://doi.org/10.48550/arXiv.2209.06280, https://doi.org/10.3847/1538-4357/ac91ca
Solar pores are efficient magnetic conduits for propagating magnetohydrodynamic wave energy into the outer regions of the solar atmosphere. Pore observations often contain isolated and/or unconnected structures, preventing the statistical examination
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b41b3e57c2c9238c5dde37a448077cef
http://arxiv.org/abs/2209.06280
http://arxiv.org/abs/2209.06280
Autor:
W. Bate, D. B. Jess, V. M. Nakariakov, S. D. T. Grant, S. Jafarzadeh, M. Stangalini, P. H. Keys, D. J. Christian, F. P. Keenan
Publikováno v:
Bate, W, Jess, D B, Nakariakov, V M, Grant, S D T, Jafarzadeh, S, Stangalini, M, Keys, P H, Christian, D J & Keenan, F P 2022, ' High-frequency Waves in chromospheric spicules ', The Astrophysical Journal, vol. 930, no. 2, 129 . https://doi.org/10.3847/1538-4357/ac5c53
Using high cadence observations from the Hydrogen-alpha Rapid Dynamics camera imaging system on the Dunn Solar Telescope, we present an investigation of the statistical properties of transverse oscillations in spicules captured above the solar limb.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d26f7bd2dc58103f75941d5992ac5a39
Autor:
Gordon Petrie, Rekha Jain, Thomas R. Ayres, Mihalis Mathioudakis, Gianna Cauzzi, Wolfgang Schmidt, Valentin Martinez Pillet, S. Parenti, Jeff Kuhn, Jeffrey W. Reep, R. J. Campbell, Alphonse C. Sterling, Stuart M. Jefferies, Navdeep K. Panesar, Chris J. Nelson, Christoph Kuckein, Alexandra Tritschler, Serena Criscuoli, Steven R. Cranmer, Vincenzo Andretta, Neal E. Hurlburt, Richard Morton, Craig DeForest, David E. McKenzie, Thomas E. Berger, Luis R. Bellot Rubio, Kevin Reardon, Elena Khomenko, Robertus Erdélyi, Shahin Jafarzadeh, Yi-Ming Wang, Rebecca Centeno, B. T. Welsch, Bart De Pontieu, Matthias Rempel, Maria D. Kazachenko, Mark Rast, Stephen J. Bradshaw, Roberto Casini, Vasco Manuel de Jorge Henriques, Wei Liu, Adam F. Kowalski, Xudong Sun, Louise K. Harra, Istvan Ballai, Michael Hahn, Yuanyong Deng, Wenda Cao, Hector Socas-Navarro, Lucas A. Tarr, Eamon Scullion, Mari Paz Miralles, Mats Carlsson, Karin Muglach, Jiong Qiu, Rahul Sharma, Sergio Javier González Manrique, Sarah Gibson, Jiajia Liu, Sarah A. Jaeggli, Scott W. McIntosh, Lyndsay Fletcher, Viktor Fedun, Gary Verth, David Kuridze, Enrico Landi, Bala Poduval, Donald Schmit, Krishnan Balasubramaniam, Clare E. Parnell, Dana Longcope, Abhishek K. Srivastava, Patrick Antolin, Edward E. DeLuca, N. B. González, Catherine E. Fischer, Thomas A. Schad, R. T. James McAteer, Yukio Katsukawa, Sanjiv K. Tiwari, Haimin Wang, Laurel A. Rachmeler, Angelos Vourlidas, Yoshinori Suematsu, P. H. Keys, Philip G. Judge
Publikováno v:
Mathioudakis, M, Keys, P, Campbell, R J, Nelson, C & Liu, J 2021, ' Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST) ', Solar Physics, vol. 296, 70 . https://doi.org/10.1007/s11207-021-01789-2
Digital.CSIC. Repositorio Institucional del CSIC
instname
Digital.CSIC. Repositorio Institucional del CSIC
instname
Full list of authors: Rast, Mark P.; Bello González, Nazaret; Bellot Rubio, Luis; Cao, Wenda; Cauzzi, Gianna; Deluca, Edward; de Pontieu, Bart; Fletcher, Lyndsay; Gibson, Sarah E.; Judge, Philip G.; Katsukawa, Yukio; Kazachenko, Maria D.; Khomenko,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4da449293874b5d7598f00816f1c3dee
https://hdl.handle.net/10023/23069
https://hdl.handle.net/10023/23069
Autor:
Marco Stangalini, A. A. Aldhafeeri, Francesco Berrilli, Shahin Jafarzadeh, J. Terradas, Mariarita Murabito, Viktor Fedun, P. H. Keys, Gary Verth, D. Del Moro, Stuart M. Jefferies, B. Fleck, David B. Jess, Roberto Soler, D. Calchetti
Publikováno v:
Astronomy & Astrophysics
Stangalini, M, Jess, D B, Verth, G, Fedun, V, Jafarzadeh, S, Keys, P H, Murabito, M, Calchetti, D, Aldhafeeri, A, Berrilli, F, Del Moro, D, Jefferies, S, Terradas, J & Soler, R 2021, ' A novel approach to identify resonant MHD wave modes in solar pores and sunspot umbrae: B-ω analysis ', Astronomy & Astrophysics, vol. 649, A169 . https://doi.org/10.1051/0004-6361/202140429
Stangalini, M, Jess, D B, Verth, G, Fedun, V, Jafarzadeh, S, Keys, P H, Murabito, M, Calchetti, D, Aldhafeeri, A, Berrilli, F, Del Moro, D, Jefferies, S, Terradas, J & Soler, R 2021, ' A novel approach to identify resonant MHD wave modes in solar pores and sunspot umbrae: B-ω analysis ', Astronomy & Astrophysics, vol. 649, A169 . https://doi.org/10.1051/0004-6361/202140429
The umbral regions of sunspots and pores in the solar photosphere are generally dominated by $3$~mHz oscillations, which are due to $p$-modes penetrating the magnetic region. In these locations, wave power is also significantly reduced with respect t
Autor:
Sven Wedemeyer, J. C. Guevara Gómez, P. H. Keys, B. Fleck, Marco Stangalini, Mikolaj Szydlarski, Shahin Jafarzadeh
Publikováno v:
Guevara Gómez, J C, Jafarzadeh, S, Wedemeyer, S, Szydlarski, M, Stangalini, M, Fleck, B & Keys, P H 2021, ' High-frequency oscillations in small chromospheric bright features observed with Atacama Large Millimetre/Submillimetre Array ', Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 379, no. 2190 . https://doi.org/10.1098/rsta.2020.0184
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Philos Trans A Math Phys Eng Sci
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Philos Trans A Math Phys Eng Sci
We report detection of oscillations in brightness temperature, size and horizontal velocity of three small bright features in the chromosphere of a plage/enhanced-network region. The observations, which were taken with high temporal resolution (i.e.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::764760731acf6ecc0e57591ef7cae5cd
http://hdl.handle.net/10852/82954
http://hdl.handle.net/10852/82954
Autor:
Mariarita Murabito, David B. Jess, S. D. T. Grant, Rony Keppens, Lisa McFetridge, P. H. Keys, Shahin Jafarzadeh, Fabrizio Giorgi, Ilaria Ermolli, S. J. Houston, Marco Stangalini
Publikováno v:
The Astrophysical Journal
The formation of shocks within the solar atmosphere remains one of the few observable signatures of energy dissipation arising from the plethora of magnetohydrodynamic waves generated close to the solar surface. Active region observations offer excep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e69cc9c042131b4ecebcb78006d63ca
http://hdl.handle.net/10852/82966
http://hdl.handle.net/10852/82966
Autor:
Marco Stangalini, Damian J. Christian, Andrés Asensio Ramos, S. D. T. Grant, Ben Snow, S. Krishna Prasad, Gert Botha, S. J. Houston, David B. Jess, Bernhard Fleck, Richard Morton, Shahin Jafarzadeh, P. H. Keys
Publikováno v:
Nature Astronomy
Sunspots are intense collections of magnetic fields that pierce through the Sun’s photosphere, with their signatures extending upwards into the outermost extremities of the solar corona1. Cutting-edge observations and simulations are providing insi