Article
Astronomy & Astrophysics
Q. M. Zhang, Z. H. Huang, Y. J. Hou, D. Li, Z. J. Ning, Z. Wu
Summary: Multiwavelength observations of the flare-related jet support the breakout jet model, shedding light on the acceleration and transport of nonthermal electrons.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Jincheng Wang, Xiaoli Yan, Zhike Xue, Liheng Yang, Qiaoling Li, Hechao Chen, Chun Xia, Zhong Liu
Summary: By studying the dynamic and thermal properties of two large plumes, the formation process of these phenomena was investigated. It was found that these large plumes are different from small-scale plumes and are the result of the breakup of the prominence bubble triggered by an enhancement of thermal pressure.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. Mierla, A. N. Zhukov, D. Berghmans, S. Parenti, F. Auchere, P. Heinzel, D. B. Seaton, E. Palmerio, S. Jejcic, J. Janssens, E. Kraaikamp, B. Nicula, D. M. Long, L. A. Hayes, I. C. Jebaraj, D-C Talpeanu, E. D'Huys, L. Dolla, S. Gissot, J. Magdalenic, L. Rodriguez, S. Shestov, K. Stegen, C. Verbeeck, C. Sasso, M. Romoli, V Andretta
Summary: This study reports a unique large prominence eruption observed by the Solar Orbiter. Observations from multiple vantage points and three-dimensional reconstruction were used to analyze its kinematics and radiative properties. The results show that the leading parts of the eruption and the corresponding coronal mass ejection propagate at high speeds, while the trailing parts are slower. Additionally, it was found that the brightness of the He II emission increases with height.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. Luna, J. R. Merou Mestre, F. Auchere
Summary: A new method for automatically detecting and parametrising oscillations in solar prominences using H-alpha data is proposed and validated through experiments. The method shows promising results in accurately identifying the periodic fluctuations in prominences and can contribute to a better understanding of their structure and evolution.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Y. W. Ni, J. H. Guo, Q. M. Zhang, J. L. Chen, C. Fang, P. F. Chen
Summary: This study investigates the decayless longitudinal filament oscillations through observations and numerical simulations. It is found that these oscillations are maintained by quasi-periodic jets and the period of oscillations depends not only on the pendulum model but also on the driving period of the jets.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
B. Filippov
Summary: The model of a partial current-carrying torus loop anchored to the photosphere is analyzed. Conditions leading to the catastrophic loss of equilibrium are considered, with the critical decay index of the external magnetic field found. The non-monotonous dependence of the critical decay index on the height of the apex and length of the flux rope is attributed to the line-tying conditions.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Boris Filippov
Summary: This article discusses the evolution and height limitation of arcade flare loops. It is widely believed that the shape of eruptive prominences plays a crucial role in determining the ascension of the loops. The analysis is based on a simple rectangular circuit model.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
B. Filippov
Summary: In this study, we numerically analyse a model of eruption of a thin flux rope with frozen endpoints in the photosphere. The parameters of the eruption depend on the initial length of the rope and its endpoints separation. The observations show that shorter filament eruptions are more often associated with flaring phenomena, while longer filament eruptions are more likely to be followed by coronal mass ejections (CMEs).
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Maria S. Madjarska, Duncan H. Mackay, Klaus Galsgaard, Thomas Wiegelmann, Haixia Xie
Summary: This study investigates a mini-filament eruption associated with cancelling magnetic fluxes and aims to gain a better understanding of the physical processes driving these small-scale eruptions. The results provide further evidence that coronal bright points (CBPs) may play a significant role in the mass and energy balance of the solar atmosphere.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Y. Fang, J. Zhang, Z. P. Song, Y. J. Hou, T. Li
Summary: This paper studies the entire process of material supply and magnetic flux injection from chromospheric fibrils to a nearby filament through multiwavelength observations. The results show that magnetic reconnection between chromospheric fibrils can produce new fibrils that merge into the filament, suggesting that filament material and magnetic flux can be supplied from surrounding chromospheric fibrils.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. W. Peat, N. Labrosse, B. Schmieder, K. Barczynski
Summary: By comparing observed and computed spectral line profiles of solar prominences, this study successfully determines plasma parameters through a new method. The inclusion of a prominence-corona transition region in the models improves fitting accuracy, while the approach also allows for the recovery of line core shifts, demonstrating its effectiveness.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
H. T. Li, X. Cheng, J. H. Guo, X. L. Yan, L. F. Wang, Z. Zhong, C. Li, M. D. Ding
Summary: In this paper, the authors present a detailed study of the formation mechanism of a filament channel (FC) using various observational instruments and methods. They find that partial filament materials are transferred to longer magnetic field lines through small-scale magnetic reconnection. These findings are significant for understanding the formation of FCs.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Pooja Devi, Pascal Demoulin, Ramesh Chandra, Reetika Joshi, Brigitte Schmieder, Bhuwan Joshi
Summary: This study selected a well-observed case to derive observational constraints for eruption models based on the analysis of a prominence eruption and loop expansion and contraction observed on March 2, 2015. The results support the standard model of eruptive flares, with the motion of loops in contraction and expansion being a consequence of a side vortex developing after the flux rope is launched in an unstable flux rope scenario.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. L. Ballester, R. Soler, M. Carbonell, J. Terradas
Summary: Partially ionized plasmas are commonly found in various astrophysical environments, with significant interest in solar physics. The study indicates that the adiabatic coefficient gamma or Gamma(1) depends on the ionization degree, particularly in solar partially ionized plasmas. The variations of Gamma(1) due to temperature, density, and ionization degree are crucial for determining the adiabatic sound speed and the period of slow waves in solar structures.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
V Jercic, R. Keppens, Y. Zhou
Summary: This study investigates the causal relations between a local energy release and a remote prominence oscillation with a realistic thread-like structure. The results show that the commonly used pendulum model is not sufficient to estimate the period of prominence oscillation accurately, and the influence of the energy source and the thread-like structure of the prominence needs to be considered.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Hillier, S. Takasao, N. Nakamura
ASTRONOMY & ASTROPHYSICS
(2016)
Article
Astronomy & Astrophysics
A. Hillier, S. Takasao, N. Nakamura
ASTRONOMY & ASTROPHYSICS
(2016)
Article
Astronomy & Astrophysics
Jack Carlyle, Andrew Hillier
ASTRONOMY & ASTROPHYSICS
(2017)
Article
Astronomy & Astrophysics
A. Hillier, T. Matsumoto, K. Ichimoto
ASTRONOMY & ASTROPHYSICS
(2017)
Article
Astronomy & Astrophysics
B. Snow, G. J. J. Botha, J. A. McLaughlin, A. Hillier
ASTRONOMY & ASTROPHYSICS
(2018)
Article
Astronomy & Astrophysics
Tetsu Anan, Yu-Wei Huang, Yoshikazu Nakatani, Kiyoshi Ichimoto, Satoru Ueno, Goichi Kimura, Shota Ninomiya, Sanetaka Okada, Naoki Kaneda
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2018)
Article
Astronomy & Astrophysics
B. Snow, G. J. J. Botha, J. A. McLaughlin, A. Hillier
ASTRONOMY & ASTROPHYSICS
(2018)
Article
Astronomy & Astrophysics
Tetsu Anan, Takurou Yoneya, Kiyoshi Ichimoto, Satoru Ueno, Daikou Shiota, Satoshi Nozawa, Shinsuke Takasao, Tomoko Kawate
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2018)
Article
Astronomy & Astrophysics
Thomas A. Schad, Gabriel Dima, Tetsu Anan
Summary: The study reports spectropolarimetric observations of a supersonic downflow impacting the lower atmosphere within a large sunspot umbra, revealing high speed emission and absorption phenomena. Magnetic field strengths and temperatures were inferred from the observations, providing insights into the impact of the downflow on the sunspot atmosphere.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Tetsu Anan, Thomas A. Schad, Reizaburo Kitai, Gabriel Dima, Sarah A. Jaeggli, Lucas A. Tarr, Manuel Collados, Carlos Dominguez-Tagle, Lucia Kleint
Summary: The study found that in the periphery of the plage region, the radiative flux of Mg ii in the chromosphere increases with the magnetic field strength. However, within the plage region itself, there is significant variation in radiative flux between regions of high magnetic field strength or at the edges of magnetic patches.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Sarah A. Jaeggli, Haosheng Lin, Peter Onaka, Hubert Yamada, Tetsu Anan, Morgan Bonnet, Gregory Ching, Xiao-Pei Huang, Maxim Kramar, Helen McGregor, Garry Nitta, Craig Rae, Louis Robertson, Thomas A. Schad, Paul Toyama, Jessica Young, Chris Berst, David M. Harrington, Mary Liang, Myles Puentes, Predrag Sekulic, Brett Smith, Stacey R. Sueoka
Summary: DL-NIRSP is a first-light instrument for the Daniel K. Inouye Solar Telescope, designed for studying magnetically sensitive spectral lines in the Sun's photosphere, chromosphere, and corona. It utilizes novel fiber-optic integral-field units and selectable feed optics, providing flexibility in spatial sampling and field coverage. With its high-resolution spectrometer and high frame rate camera subsystems, DL-NIRSP can simultaneously record spectra from a 2D field of view and study highly dynamic solar events.
Article
Astronomy & Astrophysics
Tetsu Anan, Thomas A. Schad, Sarah A. Jaeggli, Lucas A. Tan
ASTROPHYSICAL JOURNAL
(2019)
Article
Astronomy & Astrophysics
Thomas Berger, Andrew Hillier, Wei Liu
ASTROPHYSICAL JOURNAL
(2017)