Search Results - "Cheung, Mark"

The Origin of Major Solar Activity: Collisional Shearing between Nonconjugated Polarities of Multiple Bipoles Emerging within Active Regions by Chintzoglou, Georgios, Zhang, Jie, Cheung, Mark C. M., Kazachenko, Maria

“…Active regions (ARs) that exhibit compact polarity inversion lines (PILs) are known to be very flare productive. However, the physical mechanisms behind this…”
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Solar Ultraviolet Bursts by Young, Peter R., Tian, Hui, Peter, Hardi, Rutten, Robert J., Nelson, Chris J., Huang, Zhenghua, Schmieder, Brigitte, Vissers, Gregal J. M., Toriumi, Shin, van der Voort, Luc H. M. Rouppe, Madjarska, Maria S., Danilovic, Sanja, Berlicki, Arkadiusz, Chitta, L. P., Cheung, Mark C. M., Madsen, Chad, Reardon, Kevin P., Katsukawa, Yukio, Heinzel, Petr

“…The term “ultraviolet (UV) burst” is introduced to describe small, intense, transient brightenings in ultraviolet images of solar active regions. We…”
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The Multi-slit Approach to Coronal Spectroscopy with the Multi-slit Solar Explorer (MUSE) by De Pontieu, Bart, Martínez-Sykora, Juan, Testa, Paola, Winebarger, Amy R., Daw, Adrian, Hansteen, Viggo, Cheung, Mark C. M., Antolin, Patrick

“…The Multi-slit Solar Explorer (MUSE) is a proposed mission aimed at understanding the physical mechanisms driving the heating of the solar corona and the…”
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Destabilizing the Fundamental Mode of Black Holes: The Elephant and the Flea by Cheung, Mark Ho-Yeuk, Destounis, Kyriakos, Macedo, Rodrigo Panosso, Berti, Emanuele, Cardoso, Vitor

“…Recent work applying the notion of pseudospectrum to gravitational physics showed that the quasinormal mode spectrum of black holes is unstable, with the…”
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THERMAL DIAGNOSTICS WITH THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY: A VALIDATED METHOD FOR DIFFERENTIAL EMISSION MEASURE INVERSIONS by Cheung, Mark C. M., Boerner, P., Schrijver, C. J., Testa, P., Chen, F., Peter, H., Malanushenko, A.

“…ABSTRACT We present a new method for performing differential emission measure (DEM) inversions on narrow-band EUV images from the Atmospheric Imaging Assembly…”
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Stellar-mass microlensing of gravitational waves by Cheung, Mark H Y, Gais, Joseph, Hannuksela, Otto A, Li, Tjonnie G F

“…ABSTRACT When gravitational waves (GWs) pass through the nuclear star clusters of galactic lenses, they may be microlensed by the stars. Such microlensing can…”
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A METHOD FOR DATA-DRIVEN SIMULATIONS OF EVOLVING SOLAR ACTIVE REGIONS by Cheung, Mark C M, DeRosa, Marc L

“…We present a method for performing data-driven simulations of solar active region formation and evolution. The approach is based on magnetofriction, which…”
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Various Local Heating Events in the Earliest Phase of Flux Emergence by Toriumi, Shin, Katsukawa, Yukio, Cheung, Mark C. M.

“…Emerging flux regions (EFRs) are known to exhibit various sporadic local heating events in the lower atmosphere. To investigate the characteristics of these…”
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Exploring the Limits of Synthetic Creation of Solar EUV Images via Image-to-image Translation by Salvatelli, Valentina, dos Santos, Luiz F. G., Bose, Souvik, Neuberg, Brad, Cheung, Mark C. M., Janvier, Miho, Jin, Meng, Gal, Yarin, Güneş Baydin, Atilim

“…The Solar Dynamics Observatory (SDO), a NASA multispectral decade-long mission that has been daily producing terabytes of observational data from the Sun, has…”
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Flux Emergence (Theory) by Cheung, Mark C. M., Isobe, Hiroaki

“…Magnetic flux emergence from the solar convection zone into the overlying atmosphere is the driver of a diverse range of phenomena associated with solar…”
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A Critical Assessment of Nonlinear Force-Free Field Modeling of the Solar Corona for Active Region 10953 by DeRosa, Marc L, Schrijver, Carolus J, Barnes, Graham, Leka, K. D, Lites, Bruce W, Aschwanden, Markus J, Amari, Tahar, Canou, Aurélien, McTiernan, James M, Régnier, Stéphane, Thalmann, Julia K, Valori, Gherardo, Wheatland, Michael S, Wiegelmann, Thomas, Cheung, Mark C. M, Conlon, Paul A, Fuhrmann, Marcel, Inhester, Bernd, Tadesse, Tilaye

“…Nonlinear force-free field (NLFFF) models are thought to be viable tools for investigating the structure, dynamics, and evolution of the coronae of solar…”
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Data-driven Radiative Magnetohydrodynamics Simulations with the MURaM Code by Chen, Feng, Cheung, Mark C. M., Rempel, Matthias, Chintzoglou, Georgios

“…We present a method of conducting data-driven simulations of solar active regions and flux emergence with the MURaM radiative magnetohydrodynamics (MHD) code…”
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NUMERICAL STUDY ON THE EMERGENCE OF KINKED FLUX TUBE FOR UNDERSTANDING OF POSSIBLE ORIGIN OF δ-SPOT REGIONS by Takasao, Shinsuke, Fan, Yuhong, Cheung, Mark C. M., Shibata, Kazunari

“…ABSTRACT We carried out an magnetohydrodynamic simulation where a subsurface twisted kink-unstable flux tube emerges from the solar interior to the corona…”
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Comparative Study of Data-driven Solar Coronal Field Models Using a Flux Emergence Simulation as a Ground-truth Data Set by Toriumi, Shin, Takasao, Shinsuke, Cheung, Mark C. M., Jiang, Chaowei, Guo, Yang, Hayashi, Keiji, Inoue, Satoshi

“…For a better understanding of the magnetic field in the solar corona and dynamic activities such as flares and coronal mass ejections, it is crucial to measure…”
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Probing the Physics of the Solar Atmosphere with the Multi-slit Solar Explorer (MUSE). II. Flares and Eruptions by Cheung, Mark C. M., Martínez-Sykora, Juan, Testa, Paola, De Pontieu, Bart, Chintzoglou, Georgios, Rempel, Matthias, Polito, Vanessa, Kerr, Graham S., Reeves, Katharine K., Fletcher, Lyndsay, Jin, Meng, Nóbrega-Siverio, Daniel, Danilovic, Sanja, Antolin, Patrick, Allred, Joel, Hansteen, Viggo, Ugarte-Urra, Ignacio, DeLuca, Edward, Longcope, Dana, Takasao, Shinsuke, DeRosa, Marc L., Boerner, Paul, Jaeggli, Sarah, Nitta, Nariaki V., Daw, Adrian, Carlsson, Mats, Golub, Leon

“…Current state-of-the-art spectrographs cannot resolve the fundamental spatial (subarcseconds) and temporal (less than a few tens of seconds) scales of the…”
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Comprehensive Radiative MHD Simulations of Eruptive Flares above Collisional Polarity Inversion Lines by Rempel, Matthias, Chintzoglou, Georgios, Cheung, Mark C. M., Fan, Yuhong, Kleint, Lucia

“…We present a new simulation setup using the MURaM radiative MHD code that allows the study of the formation of collisional polarity inversion lines (cPILs) in…”
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Solar Orbiter and SDO Observations, and a Bifrost Magnetohydrodynamic Simulation of Small-scale Coronal Jets by Panesar, Navdeep K., Hansteen, Viggo H., Tiwari, Sanjiv K., Cheung, Mark C. M., Berghmans, David, Müller, Daniel

“…We report high-resolution, high-cadence observations of five small-scale coronal jets in an on-disk quiet Sun region observed with Solar Orbiter’s EUI/HRI EUV…”
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LIGHT BRIDGE IN A DEVELOPING ACTIVE REGION. I. OBSERVATION OF LIGHT BRIDGE AND ITS DYNAMIC ACTIVITY PHENOMENA by Toriumi, Shin, Katsukawa, Yukio, Cheung, Mark C. M.

“…ABSTRACT Light bridges, the bright structures that divide the umbra of sunspots and pores into smaller pieces, are known to produce a wide variety of activity…”
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Surface Flux Transport on the Sun by Yeates, Anthony R., Cheung, Mark C. M., Jiang, Jie, Petrovay, Kristof, Wang, Yi-Ming

“…We review the surface flux transport model for the evolution of magnetic flux patterns on the Sun’s surface. Our underlying motivation is to understand the…”
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Sun-as-a-star Spectral Irradiance Observations of Transiting Active Regions by Toriumi, Shin, Airapetian, Vladimir S., Hudson, Hugh S., Schrijver, Carolus J., Cheung, Mark C. M., DeRosa, Marc L.

“…Major solar flares are prone to occur in active-region (AR) atmospheres associated with large, complex, dynamically evolving sunspots. This points to the…”
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