Results 11 to 20 of about 2,624,667 (213)

Plasma Astrophysics: Kinetic Processes in Solar and Stellar Coronae, Second Edition [PDF]

open access: bronzeEos, Transactions American Geophysical Union, 2003
A collision‐less plasma is an ionized fluid that is so hot and tenuous that interactions between individual particles are unimportant. In such a plasma, electric and magnetic fields mediate interactions among particles, and fundamental physics is addressed by kinetic theories that describe not only the spatial and temporal variations of the medium, but
S. Peter Gary
semanticscholar   +4 more sources

Advances in Solar-Stellar Astrophysics [PDF]

open access: bronzePublications of the Astronomical Society of the Pacific, 1996
The discovery on stars of coronae and of X-ray emission from flares in the 1970's opened up the investigation of stellar activity. Solar-stellar astrophysics has now become a two-way street. The rich detail of the Sun provides a close-up view of physical phenomena, while the stellar observations provide a way to, in effect, vary the otherwise fixed ...
Bernhard Haisch, J. H. M. M. Schmitt
semanticscholar   +4 more sources

Solar, Stellar and Galactic Connections Between Particle Physics and Astrophysics [PDF]

open access: closed, 2007
The very small and the very large are intimately connected in Nature. Particle physics and astrophysics meet in fundamental questions: the structure and evolution of stars; their end and how this is manifested; how we think galaxies are created from matter we have yet to discover and why we believe the most energetic particles cannot come from the ...
A. Carramiñana   +2 more
openalex   +3 more sources

Stellar Physics and General Relativity

open access: yesAstronomische Nachrichten, EarlyView.
The general theory of relativity is currently established as the most precise theory of gravity supported by observations, and its application is diverse ranging from astronomy to cosmology, while its application to astrophysics has been restricted only ...
Shuichi Yokoyama
semanticscholar   +2 more sources

Understanding the Duration of Solar and Stellar Flares at Various Wavelengths [PDF]

open access: yesAstrophysical Journal, 2023
Recent irradiance measurements from numerous heliophysics and astrophysics missions including Solar Dynamics Observatory (SDO), GOES, Kepler, TESS, Chandra, the X-ray Multi-Mirror Mission, and NICER have provided critical input into understanding the ...
J. Reep, V. Airapetian
semanticscholar   +1 more source

Application of a Magnetic-field-induced Transition in Fe x to Solar and Stellar Coronal Magnetic Field Measurements [PDF]

open access: yesResearch in Astronomy and Astrophysics, 2022
Magnetic fields play a key role in driving a broad range of dynamic phenomena in the atmospheres of the Sun and other stars. Routine and accurate measurements of the magnetic fields at all the atmospheric layers are of critical importance to understand ...
Yajie Chen   +5 more
semanticscholar   +1 more source

Atomic diffusion in solar-like stars with MESA. Comparison with the Montreal/Montpellier and CESTAM stellar evolution codes [PDF]

open access: yesAstronomy & Astrophysics, 2022
Context. The stellar evolution code Modules for Experiments in Stellar Astrophysics (MESA) is public and is widely used by the community. It includes the possibility of taking several non-standard processes such as atomic di ff usion into account. Even if
Bernardo Campilho, M. Deal, D. Bossini
semanticscholar   +1 more source

Stellar population astrophysics (SPA) with the TNG. The chemical content of the red supergiant population in the Perseus complex [PDF]

open access: yesAstronomy & Astrophysics, 2021
Context. The Perseus complex in the outer disk of the Galaxy hosts a number of clusters and associations of young stars. Gaia is providing a detailed characterization of their kinematic structure and evolutionary properties. Aims.
C. Fanelli   +5 more
semanticscholar   +1 more source

Connecting measurements of solar and stellar brightness variations [PDF]

open access: yesAstronomy & Astrophysics, 2020
Context. A comparison of solar and stellar brightness variations is hampered by the difference in spectral passbands that are used in observations, and also by the possible difference in the inclination of the solar and stellar rotation axes from the ...
N.-E. Nèmec   +11 more
semanticscholar   +1 more source

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