Results 21 to 30 of about 146,288 (166)

STEllAR-GROUP/octotiger: Kokkos kernels

open access: yes, 2021
What's Changed Branch by @diehlpk in https://github.com/STEllAR-GROUP/octotiger/pull/341 Add Zenodo DOI by @diehlpk in https://github.com/STEllAR-GROUP/octotiger/pull/342 Docu by @diehlpk in https://github.com/STEllAR-GROUP/octotiger/pull/347 Add ...
Biddiscombe, John   +21 more
core   +1 more source

Radiative Transfer in 3D Model Stellar Atmospheres

open access: yes, 2003
Recently 3D hydrodynamical simulations of stellar surface convection have become feasible thanks to advances in computer technology and efficient numerical algorithms. Available observational diagnostics indicate that these models are highly realistic in
Asplund, Martin,, Collet, Remo,
core   +8 more sources

Disentangling planetary orbits from stellar activity in radial-velocity surveys [PDF]

open access: yes, 2013
The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now ...
Segransan, Damien   +41 more
core   +1 more source

Stellar magnetism : empirical trends with age and rotation [PDF]

open access: yes, 2014
AAV acknowledges support from a Royal Astronomical Society Fellowship and from the Swiss National Science Foundation via an Ambizione Fellowship. SGG acknowledges support from the Science and Technology Facilities Council (STFC) via an Ernest Rutherford ...
G. Hussain   +45 more
core   +1 more source

Heating of Stellar Chromospheres and Transition Regions [PDF]

open access: yesSymposium - International Astronomical Union, 2004
To explain the heating of stellar chromospheres and transition regions, two classes of heating mechanisms have been considered: dissipation of acoustic and magnetic waves generated in stellar convection zones; and dissipation of currents generated by photospheric motions of surface magnetic fields.
openaire   +1 more source

The Magnetic Field Configuration in Solar and Stellar Chromospheres [PDF]

open access: yesSymposium - International Astronomical Union, 1983
Calculations are presented for the inhomogeneous magnetic field structure above a stellar photosphere which has magnetic flux tubes located at the downdraughts of its supergranulation pattern. Regions can be delineated where the ambient magnetic energy density is large or small compared with the thermal energy density derived from a model atmosphere ...
U. Anzer, D. J. Galloway
openaire   +1 more source

Summary of the Stellar Chromospheres Conference [PDF]

open access: yes, 1973
Studies on solar-type stellar chromospheres include diagnostic techniques, observations on different kinds of apparently existing chromospheres, enhancement dynamics of chromospheric activity, and interpretation of stellar spectroscopy with theoretical ...
Wilson, O. C.
core  

The relative emission from chromospheres and coronae: dependence on spectral type and age [PDF]

open access: yes, 2020
Extreme-ultraviolet and X-ray emission from stellar coronae drives mass loss from exoplanet atmospheres, and ultraviolet emission from stellar chromospheres drives photochemistry in exoplanet atmospheres.
Pinada, J Sebastian   +47 more
core   +1 more source

Tracing kinematic (mis)alignments in CALIFA merging galaxies : Stellar and ionized gas kinematic orientations at every merger stage [PDF]

open access: yes, 2015
J.M.A. and V.W. acknowledge support from the European Research Council Starting Grant (SEDmorph; P.I. V. Wild).We present spatially resolved stellar and/or ionized gas kinematic properties for a sample of 103 interacting galaxies, tracing all merger ...
Ziegler, Katharina B.   +71 more
core   +2 more sources

Comparing Solar Structure Detection Methods in SDO/AIA Observations and the Application to Raw Uncalibrated Data

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Recent advances in solar physics increasingly rely on automated identification of coronal structures using machine learning. Yet most studies emphasize scientific performance without evaluating feasibility for onboard deployment to prioritize downlink observations.
P. Gonidakis   +11 more
wiley   +1 more source

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