Results 51 to 60 of about 148,277 (289)
The Stagger Code for Accurate and Efficient, Radiation-coupled Magnetohydrodynamic Simulations
The Astrophysical JournalWe describe the Stagger code for simulations of magnetohydrodynamic (MHD) systems. This is a modular code with a variety of physics modules that will let the user run simulations of deep stellar atmospheres, sunspot formation, stellar chromospheres and ...
Robert F. Stein +3 more
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The Solar Particle Acceleration Radiation and Kinetics (SPARK) Mission Concept
Aerospace, 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.
Hamish A. S. Reid +59 more
doaj +1 more source
Arthritis Care &Research, EarlyView.Systemic sclerosis (SSc) is a rare autoimmune disease defined by immune dysregulation, vasculopathy, and progressive fibrosis of the skin and internal organs. Despite advances in care, major complications such as interstitial lung disease (ILD) and myocardial involvement remain the leading causes of morbidity and mortality.
Cristiana Sieiro Santos +2 more
wiley +1 more source
The Astrophysical JournalCoronal mass ejections (CMEs) are large-scale eruptions of magnetized plasma from stellar coronae, and they are always accompanied by flares. In this study, we present high-resolution spectroscopic observations of a long-duration optical flare on the RS ...
Dongtao Cao, Shenghong Gu
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The Carbon Star DY Persei May Be a Cool R Coronae Borealis Variable
The Astrophysical Journal, 2023 Optical and near-IR photometry suggests that the carbon star DY Persei exhibits fadings similar to those of R Coronae Borealis (RCB) variables. Photometric surveys of the Galaxy and Magellanic Clouds uncovered new DY Per variables with infrared ...
D. A. García-Hernández +5 more
doaj +1 more source
The Lupus Damage Index Revision Program: Results From the Item Generation and Reduction Phases
Arthritis Care &Research, EarlyView.Objective A data‐driven and expert/patient consensus‐based project to develop a revised Systemic Lupus International Collaborating Clinics (SLICC)/American College of Rheumatology (ACR) Damage Index (SDI) is under way supported by SLICC, ACR, and the Lupus Foundation of America. Our objective is to report the item generation and reduction phase results
Burak Kundakci +25 more
wiley +1 more source
The formation and eruption of magnetic flux ropes in solar and stellar coronae [PDF]
, 2015 Flux ropes are magnetic structures commonly found in the solar corona. They are thought to play an important role in solar flares and coronal mass ejections.
Gibb, Gordon Peter Samuel
core +2 more sources
The Influence of Stellar Chromospheres and Coronae on Exoplanet Transmission Spectroscopy
The Astrophysical Journal LettersA main source of bias in transmission spectroscopy of exoplanet atmospheres is magnetic activity of the host star in the form of stellar spots, faculae, or flares. However, the fact that main-sequence stars have a chromosphere and a corona and that these
Volker Perdelwitz +3 more
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Astronomy & AstrophysicsContext. Stellar coronae are unresolved in X-rays, so inferences about their structure rely on spectral analysis. The Sun-as-an-X-ray-star (SaXS) approach uses the Sun as a spatially resolved template to interpret stellar spectra, but previous SaXS ...
Joseph W. M. +3 more
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Observations of stellar coronae and prominences [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractX-ray and EUV observations of young cool stars have shown that their coronae are extremely pressured environments with temperatures and densities that are up to two orders of magnitudes larger than those observed in the solar corona. At the same time rapidly transiting absorption features in optical and UV spectra reveal the presence of large ...
openaire +1 more source