Search Results - "Bradshaw, Stephen J"

Modeling Transition Region Hot Loops on the Sun: The Necessity of Rapid, Complex Spatiotemporal Heating and Nonequilibrium Ionization by Bahauddin, Shah Mohammad, Bradshaw, Stephen J.

“…The study examines the heating profile of hot solar transition region loops, particularly focusing on transient brightenings observed in IRIS 1400 Å slit-jaw…”
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Coronal Loop Scaling Laws for Various Forms of Parallel Heat Conduction by Bradshaw, Stephen J., Emslie, A. Gordon, Bian, N. H., Kontar, Eduard P.

“…The solar atmosphere is dominated by loops of magnetic fluxes that connect the multi-million degree corona to the much cooler chromosphere. The temperature and…”
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Collisional and Radiative Processes in Optically Thin Plasmas by Bradshaw, Stephen J., Raymond, John

“…Most of our knowledge of the physical processes in distant plasmas is obtained through measurement of the radiation they produce. Here we provide an overview…”
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Solar Active Region Heating Diagnostics from High-temperature Emission Using the MaGIXS by Athiray, P. S., Winebarger, Amy R., Barnes, Will T., Bradshaw, Stephen J., Savage, Sabrina, Warren, Harry P., Kobayashi, Ken, Champey, Patrick, Golub, Leon, Glesener, Lindsay

“…The relative amount of high-temperature plasma has been found to be a useful diagnostic to determine the frequency of coronal heating on sub-resolution…”
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The origin of reconnection-mediated transient brightenings in the solar transition region by Bahauddin, Shah Mohammad, Bradshaw, Stephen J., Winebarger, Amy R.

“…The ultraviolet emission from the solar transition region is dominated by dynamic, low-lying magnetic loops. The enhanced spatial and temporal resolution of…”
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Hard X-Ray Constraints on Small-scale Coronal Heating Events by Marsh, Andrew J., Smith, David M., Glesener, Lindsay, Klimchuk, James A., Bradshaw, Stephen J., Vievering, Juliana, Hannah, Iain G., Christe, Steven, Ishikawa, Shin-nosuke, Krucker, Säm

“…Much evidence suggests that the solar corona is heated impulsively, meaning that nanoflares may be ubiquitous in quiet and active regions (ARs). Hard X-ray…”
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Exploring Standing and Reflected Slow-mode Waves in Flaring Coronal Loops: A Parametric Study Using 2.5D MHD Modeling by Wang, Tongjiang, Ofman, Leon, Bradshaw, Stephen J.

“…Abstract Recent observations of reflected propagating and standing slow-mode waves in hot flaring coronal loops have spurred our investigation into their…”
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Electron Beams Cannot Directly Produce Coronal Rain by Reep, Jeffrey W., Antolin, Patrick, Bradshaw, Stephen J.

“…Coronal rain is ubiquitous in flare loops, forming shortly after the onset of the solar flare. Rain is thought to be caused by a thermal instability, a…”
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Quantifying the Influence of Key Physical Processes on the Formation of Emission Lines Observed by IRIS. I. Non-equilibrium Ionization and Density-dependent Rates by Bradshaw, Stephen J., Testa, Paola

“…In the work described here, we investigate atomic processes leading to the formation of emission lines within the Interface Region Imaging Spectrograph…”
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Temperature and Differential Emission Measure Profiles in Turbulent Solar Active Region Loops by Emslie, A. Gordon, Bradshaw, Stephen J.

“…We examine the temperature structure of static coronal active region loops in regimes where thermal conductive transport is driven by Coulomb collisions, by…”
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The Dynamic Evolution of Solar Wind Streams Following Interchange Reconnection by Scott, Roger B., Bradshaw, Stephen J., Linton, Mark G.

“…Interchange reconnection is thought to play an important role in determining the dynamics and material composition of the slow solar wind that originates from…”
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Scaling Laws for Dynamic Solar Loops by Bradshaw, Stephen J., Emslie, A. Gordon

“…The scaling laws which relate the peak temperature and volumetric heating rate to the pressure and length for static coronal loops were established over 40…”
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Simulation of Thermal Nonequilibrium Cycles in the Solar Wind by Scott, Roger B., Reep, Jeffrey W., Linton, Mark G., Bradshaw, Stephen J.

“…Thermal nonequilibrium (TNE) is a condition of the plasma in the solar corona in which the local rate of energy loss due to radiation increases to the point…”
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Asymmetries and Broadenings of Spectral Lines in Strongly Charged Iron Produced during Solar Flares by Mandage, Revati S., Bradshaw, Stephen J.

“…Spatially resolved spectroscopic observations show wing enhancements and broadening in extreme ultraviolet emission lines, particularly in hot iron lines…”
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Efficient Calculation of Non-local Thermodynamic Equilibrium Effects in Multithreaded Hydrodynamic Simulations of Solar Flares by Reep, Jeffrey W., Bradshaw, Stephen J., Crump, Nicholas A., Warren, Harry P.

“…Understanding the dynamics of the chromosphere is crucial to understanding energy transport across the solar atmosphere. The chromosphere is optically thick at…”
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Flows in Enthalpy-based Thermal Evolution of Loops by Rajhans, Abhishek, Tripathi, Durgesh, Bradshaw, Stephen J., Kashyap, Vinay L., Klimchuk, James A.

“…Plasma-filled loop structures are common in the solar corona. Because detailed modeling of the dynamical evolution of these structures is computationally…”
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Solar physics: Swirls in the corona by Bradshaw, Stephen J

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Swirls in the corona by Bradshaw, Stephen J.

“…Observations made by NASA's Solar Dynamics Observatory have been used to identify signatures of a conduit through which energy could be transported from the…”
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Spectral Line Asymmetries of Hot Fe Lines in Multiloop Models by Mandage, Revati S., Bradshaw, Stephen J.

“…Extreme ultraviolet emission line profiles often show asymmetries, in the form of wing enhancements, during solar flares. Various explanations, ranging from…”
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The way forward for coronal heating by De Moortel, Ineke, Browning, Philippa, Bradshaw, Stephen J, Pintér, Balázs, Kontar, Eduard P

“…The coronal heating problem is one of the major outstanding challenges in astrophysics and, while there has been considerable progress in both theory and…”
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