Results 21 to 30 of about 148,277 (289)
Stellar activity and coronal heating: an overview of recent results. [PDF]
Philos Trans A Math Phys Eng Sci, 2015 Observations of the coronae of the Sun and of solar-like stars provide complementary information to advance our understanding of stellar magnetic activity, and of the processes leading to the heating of their outer atmospheres.
Testa P, Saar SH, Drake JJ.
europepmc +2 more sources
Highlights of Astronomy, 1980 The standard theory of stellar coronae requires the presence of vigorous surface convection. In consequence, the expectation of such a theory is that stellar x-ray emission — if due to a corona — should be limited to a subset of stars (principally those of main sequence spectral types F and G), and therefore should be relatively rare.
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Three-dimensional solutions of the magnetohydrostatic equations : rigidly rotating magnetized coronae in cylindrical geometry [PDF]
, 2010 Context. Solutions of the magnetohydrostatic (MHS) equations are very important for modelling astrophysical plasmas, such as the coronae of magnetized stars.
Al-Salti, Nasser +5 more
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Emission Lines of Fe xiv, Fe xv, and Fe xvi in the Extreme Ultraviolet Region 40–100 Å
The Astrophysical Journal, 2023 We report on emission spectra of iron in the extreme ultraviolet recorded at an electron density of ∼10 ^11 cm ^−3 on the Lawrence Livermore electron beam ion trap facility.
J. K. Lepson +3 more
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The FIP and Inverse FIP Effects in Solar and Stellar Coronae
Living Reviews in Solar Physics, 2015 We review our state of knowledge of coronal element abundance anomalies in the Sun and stars. We concentrate on the first ionization potential (FIP) effect observed in the solar corona and slow-speed wind, and in the coronae of solar-like dwarf stars ...
J. Martin Laming
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The Astrophysical Journal, 2023 The ponderomotive force has been suggested to be the main mechanism to produce the so-called first ionization potential (FIP) effect—the enrichment of low-FIP elements observed in the outer solar atmosphere, in the solar wind, and in solar energetic ...
Juan Martínez-Sykora +5 more
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Mass loss from coronae and its effect upon stellar rotation [PDF]
, 1968 Mass loss from coronae and its effect on stellar ...
Kyoji Nariai, Nariai, K.
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The High-energy Spectrum of the Young Planet Host V1298 Tau
The Astronomical Journal, 2023 V1298 Tau is a young pre-main-sequence star hosting four known exoplanets that are prime targets for transmission spectroscopy with current-generation instruments. This work pieces together observations from the NICER X-ray telescope, the Space Telescope
Girish M. Duvvuri +6 more
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Tomography of a stellar X-ray corona:αCoronae Borealis [PDF]
Astronomy & Astrophysics, 2003 We interpret the X-ray light curve obtained by XMM-Newton during a total X-ray eclipse in the nearby binary star α Coronae Borealis. This system consists of a G5 V main-sequence star orbiting an X-ray dark A0 star. The secondary G star is a young, active solar analog with an age of a few 100 Myr.
Güdel, M. +3 more
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The magnetic fields of β Coronae Borealis and the early F-star σ Bootis [PDF]
, 2022 International audienceThe study of magnetism in stars close to the transition from fossil to dynamo magnetic fields is important for understanding the nature of the stellar dynamo and dynamics of the outer atmosphere. We present surface magnetic maps for
Folsom, C. P. +4 more
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