353 citations · 3.2k across the 63 of their papers we have counts for
52 papers · 1 filter
Data-inspired simulation of AR 11158
Matthias Rempel, Georgios Chintzoglou
We present a data-inspired simulation of NOAA active region AR 11158. We simulate the formation of a collisional polarity inversion line (cPIL) by moving sunspots in a quadrupolar…
Quantifying Poynting flux in the Quiet Sun Photosphere
Dennis Tilipman, Maria Kazachenko, Benoit Tremblay +3
Poynting flux is the flux of magnetic energy, which is responsible for chromospheric and coronal heating in the solar atmosphere. It is defined as a cross product of electric and m…
The Puzzling Structure of Solar Convection: Window into the Dynamo
Nicholas A. Featherstone, Kyle C. Augustson, Jonathan M. Aurnou +25
The operation of the solar dynamo, with all of its remarkable spatio-temporal ordering, remains an outstanding problem of modern solar physics. A number of mechanisms that might pl…
Small-scale dynamos: From idealized models to solar and stellar applications
Matthias Rempel, Tanayveer Bhatia, Luis Bellot Rubio +1
In this article we review small-scale dynamo processes that are responsible for magnetic field generation on scales comparable to and smaller than the energy carrying scales of tur…
Limitations and biases in the retrieval of the polar magnetic field I: the role of the magnetic filling factor in Milne-Eddington inversions of simulated Hinode/SP data
Rebecca Centeno, Ivan Milić, Matthias Rempel +2
We study the extent to which Milne-Eddington inversions are able to retrieve and characterize the magnetic landscape of the solar poles from observations by the spectropolarimeter…
Eruption of a Magnetic Flux Rope in a Comprehensive Radiative Magnetohydrodynamic Simulation of flare-productive active regions
Feng Chen, Matthias Rempel, Yuhong Fan
Radiative magnetohydrodynamic simulation includes sufficiently realistic physics to allow for the synthesis of remote sensing observables that can be quantitatively compared with o…
Comprehensive radiative MHD simulations of eruptive flares above collisional polarity inversion lines
Matthias Rempel, Georgios Chintzoglou, Mark C. M. Cheung +2
We present a new simulation setup using the MURaM radiative Magnetohydrodynamic (MHD) code that allows to study the formation of collisional polarity inversion lines (cPILs) in the…
Data-Driven Radiative Magnetohydrodynamics Simulations with the MURaM code
Feng Chen, Mark C. M. Cheung, Matthias Rempel +1
We present a method of conducting data-driven simulations of solar active regions and flux emergence with the MURaM radiative magnetohydrodynamics (MHD) code. The horizontal electr…
Small-scale loops heated to transition region temperatures and their chromospheric signatures in the simulated solar atmosphere
M. Skan, S. Danilovic, J. Leenaarts +2
Recent observations revealed loop-like structures at very small scales visible in observables that sample transition region (TR) and coronal temperatures. Their formation remains u…
Rapid Blue- and Red-shifted Excursions in H line profiles synthesized from realistic 3D MHD simulations
S. Danilovic, J. P. Bjørgen, J. Leenaarts +1
Rapid blue- and red-shifted events (RBEs/RREs) may have an important role in mass-loading and heating the solar corona, but their nature and origin are still debatable. We aim to m…
Effects of spectral resolution on simple magnetic field diagnostics of the Mg II h & k lines
Rebecca Centeno, Matthias Rempel, Roberto Casini +1
We study the effects of finite spectral resolution on the magnetic field values retrieved through the weak field approximation (WFA) from the cores of the Mg II h & k lines. The re…
Chromospheric Extension of the MURaM Code
D. Przybylski, R. Cameron, S. K. Solanki +5
Detailed numerical models of chromosphere and corona are required to understand the heating of the solar atmosphere. An accurate treatment of the solar chromosphere is complicated…
Heating of the solar chromosphere through current dissipation
J. M. da Silva Santos, S. Danilovic, J. Leenaarts +5
The solar chromosphere is heated to temperatures higher than predicted by radiative equilibrium. This excess heating is greater in active regions where the magnetic field is strong…
A solar coronal loop in a box: Energy generation and heating
C. Breu, H. Peter, R. Cameron +4
Coronal loops are the basic building block of the upper solar atmosphere. Comprehending how these are energized, structured, and evolve is key to understanding stellar coronae. Her…
Efficient numerical treatment of ambipolar and Hall drift as hyperbolic system
M. Rempel, D. Przybylski
Partially ionized plasmas, such as the solar chromosphere, require a generalized Ohm's law including the effects of ambipolar and Hall drift. While both describe transport processe…
Solar Atmosphere Radiative Transfer Model Comparison based on 3D MHD simulations
M. Haberreiter, S. Criscuoli, M. Rempel +1
The reconstruction of the solar spectral irradiance (SSI) on various time scales is essential for the understanding of the Earth's climate response to the SSI variability. The driv…
Probing the Physics of the Solar Atmosphere with the Multi-slit Solar Explorer (MUSE): II. Flares and Eruptions
Mark C. M. Cheung, Juan Martínez-Sykora, Paola Testa +25
Current state-of-the-art spectrographs cannot resolve the fundamental spatial (sub-arcseconds) and temporal scales (less than a few tens of seconds) of the coronal dynamics of sola…
Probing the physics of the solar atmosphere with the Multi-slit Solar Explorer (MUSE): I. Coronal Heating
Bart De Pontieu, Paola Testa, Juan Martinez-Sykora +24
The Multi-slit Solar Explorer (MUSE) is a proposed NASA MIDEX mission, currently in Phase A, composed of a multi-slit EUV spectrograph (in three narrow spectral bands centered arou…
Measuring the magnetic origins of solar flares, CMEs and Space Weather
Philip Judge, Matthias Rempel, Rana Ezzeddine +11
We take a broad look at the problem of identifying the magnetic solar causes of space weather. With the lackluster performance of extrapolations based upon magnetic field measureme…
The Coronal Veil
A. Malanushenko, M. C. M. Cheung, C. E. DeForest +2
Coronal loops, seen in solar coronal images, are believed to represent emission from magnetic flux tubes with compact cross-sections. We examine the 3D structure of plasma above an…
A Comprehensive Radiative Magnetohydrodynamics Simulation of Active Region Scale Flux Emergence from the Convection Zone to the Corona
Feng Chen, Matthias Rempel, Yuhong Fan
We present a comprehensive radiative magnetohydrodynamic simulation of the quiet Sun and large solar active regions. The 197 Mm wide simulation domain spans from 18 (10) Mm beneath…
The Dimmest State of the Sun
K. L. Yeo, S. K. Solanki, N. A. Krivova +5
How the solar electromagnetic energy entering the Earth's atmosphere varied since pre-industrial times is an important consideration in the climate change debate. Detrimental to th…
Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
Mark P. Rast, Nazaret Bello González, Luis Bellot Rubio +84
The Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand and model the basic physical processes that control the structure and dynamics of…
Acoustic-gravity wave propagation characteristics in 3D radiation hydrodynamic simulations of the solar atmosphere
B. Fleck, M. Carlsson, E. Khomenko +3
There has been tremendous progress in the degree of realism of three-dimensional radiation magneto-hydrodynamic simulations of the solar atmosphere in the past decades. Four of the…