Zobrazeno 1 - 10
of 239
pro vyhledávání: '"Eduard P. Kontar"'
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-11 (2022)
Quasi-periodic pulsations (QPPs) are frequently detected in solar and stellar flares, but the underlying physical mechanisms are still to be ascertained. Here, the authors show microwave QPPs during a solar flare originating from quasi-periodic magne
Externí odkaz:
https://doaj.org/article/93052ec32a814d72a6bb9fd48df16b16
Autor:
Francesco Azzollini, A. Gordon Emslie, Daniel L. Clarkson, Nicolina Chrysaphi, Eduard P. Kontar
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 72 (2024)
Radio signals propagating via the solar corona and solar wind are significantly affected by compressive waves, impacting the properties of solar bursts as well as sources viewed through the turbulent solar atmosphere. While static fluctuations scatte
Externí odkaz:
https://doaj.org/article/9100aca7096c44a2a3dcc75eefa8069d
Autor:
Arnaud Zaslavsky, Justin C. Kasper, Eduard P. Kontar, Davin E. Larson, Milan Maksimovic, José M. D. C. Marques, Georgios Nicolaou, Christopher J. Owen, Orlando Romeo, Phyllis L. Whittlesey
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 60 (2024)
This study explores the impact of a turbulent scattering mechanism, akin to those influencing solar and galactic cosmic rays propagating in the interplanetary medium, on the population of suprathermal electrons in the solar wind. We employ a Fokker
Externí odkaz:
https://doaj.org/article/866f36993b2a48078187fcfc61312352
Autor:
Natasha L. S. Jeffrey, Säm Krucker, Morgan Stores, Eduard P. Kontar, Pascal Saint-Hilaire, Andrea F. Battaglia, Laura Hayes, Hannah Collier, Astrid Veronig, Yang Su, Srikar Paavan Tadepalli, Fanxiaoyu Xia
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 145 (2024)
The Spectrometer/Telescope for Imaging X-rays (STIX) on board Solar Orbiter (SolO) provides a unique opportunity to systematically perform stereoscopic X-ray observations of solar flares with current and upcoming X-ray missions at Earth. These observ
Externí odkaz:
https://doaj.org/article/1c1ad2a794714d5585511dc927dff187
Autor:
Hamish A. S. Reid, Sophie Musset, Daniel F. Ryan, Vincenzo Andretta, Frédéric Auchère, Deborah Baker, Federico Benvenuto, Philippa Browning, Éric Buchlin, Ariadna Calcines Rosario, Steven D. Christe, Alain Jody Corso, Joel Dahlin, Silvia Dalla, Giulio Del Zanna, Carsten Denker, Jaroslav Dudík, Robertus Erdélyi, Ilaria Ermolli, Lyndsay Fletcher, Andrzej Fludra, Lucie M. Green, Mykola Gordovskyy, Salvo L. Guglielmino, Iain Hannah, Richard Harrison, Laura A. Hayes, Andrew R. Inglis, Natasha L. S. Jeffrey, Jana Kašparová, Graham S. Kerr, Christian Kintziger, Eduard P. Kontar, Säm Krucker, Timo Laitinen, Philippe Laurent, Olivier Limousin, David M. Long, Shane A. Maloney, Paolo Massa, Anna Maria Massone, Sarah Matthews, Tomasz Mrozek, Valery M. Nakariakov, Susanna Parenti, Michele Piana, Vanessa Polito, Melissa Pesce-Rollins, Paolo Romano, Alexis P. Rouillard, Clementina Sasso, Albert Y. Shih, Marek Stęślicki, David Orozco Suárez, Luca Teriaca, Meetu Verma, Astrid M. Veronig, Nicole Vilmer, Christian Vocks, Alexander Warmuth
Publikováno v:
Aerospace, Vol 10, Iss 12, p 1034 (2023)
Particle acceleration is a fundamental process arising in many astrophysical objects, including active galactic nuclei, black holes, neutron stars, gamma-ray bursts, accretion disks, solar and stellar coronae, and planetary magnetospheres. Its ubiqui
Externí odkaz:
https://doaj.org/article/7de951d7474e42deb96132d1967570a2
Publikováno v:
The Astrophysical Journal Letters, Vol 947, Iss 1, p L13 (2023)
Solar flares are known to be prolific electron accelerators, yet identifying the mechanism(s) for such efficient electron acceleration in solar flare (and similar astrophysical settings) presents a major challenge. This is due in part to a lack of ob
Externí odkaz:
https://doaj.org/article/8ff36933591545ca8431812389206222
Autor:
K. Sasikumar Raja, Milan Maksimovic, Eduard P. Kontar, Xavier Bonnin, Philippe Zarka, Laurent Lamy, Hamish Reid, Nicole Vilmer, Alain Lecacheux, Vratislav Krupar, Baptiste Cecconi, Lahmiti Nora, Laurent Denis
Publikováno v:
The Astrophysical Journal, Vol 960, Iss 1, p 93 (2023)
Externí odkaz:
https://doaj.org/article/273301f5315747dd96077f21ca9e2faf
Autor:
Eduard P. Kontar, A. Gordon Emslie, Daniel L. Clarkson, Xingyao Chen, Nicolina Chrysaphi, Francesco Azzollini, Natasha L. S. Jeffrey, Mykola Gordovskyy
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 112 (2023)
Solar radio bursts are strongly affected by radio-wave scattering on density inhomogeneities, changing their observed time characteristics, sizes, and positions. The same turbulence causes angular broadening and scintillation of galactic and extragal
Externí odkaz:
https://doaj.org/article/a889556a2a57456fb956950067ea7522
Autor:
Gelu M. Nita, Gregory D. Fleishman, Alexey A. Kuznetsov, Sergey A. Anfinogentov, Alexey G. Stupishin, Eduard P. Kontar, Samuel J. Schonfeld, James A. Klimchuk, Dale E. Gary
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 267, Iss 1, p 6 (2023)
To facilitate the study of solar flares and active regions, we have created a modeling framework, the freely distributed GX Simulator IDL package, that combines 3D magnetic and plasma structures with thermal and nonthermal models of the chromosphere,
Externí odkaz:
https://doaj.org/article/76a9091ab77b4b158cf6709a998d0012
Autor:
Daniel L. Clarkson, Eduard P. Kontar, Nicole Vilmer, Mykola Gordovskyy, Xingyao Chen, Nicolina Chrysaphi
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 1, p 33 (2023)
Understanding electron acceleration associated with magnetic energy release at subsecond scales presents major challenges in solar physics. Solar radio spikes observed as subsecond, narrow-bandwidth bursts with Δ f / f ∼ 10 ^−3 –10 ^−2 are i
Externí odkaz:
https://doaj.org/article/7a227a2fa3fa49d28ec405fb0f4d23ff