Results 91 to 100 of about 3,072 (224)

Solar Wind Heavy Ions and Alpha Particles Within Earth's Magnetosphere and Their Variability With Upstream Conditions

Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.
Abstract Working toward the goal of understanding solar wind (SW) entry to the Earth's magnetosphere, this study examines solar‐origin ion composition in the magnetotail. During its trajectory, Wind spent a significant amount of time in the Earth's magnetotail, where its SupraThermal Ion Composition Spectrometer (STICS) measured the mass and mass per ...
S. Colón‐Rodríguez, M. W. Liemohn, J. M. Raines, S. T. Lepri   +3 more
wiley   +1 more source

The solar chromosphere at high resolution with IBIS [PDF]

, 2008
Context. The exact nature of the quiet solar chromosphere and especially its temporal variation, are still subjects of intense debate. One of the contentious issues is the possible role of the magnetic field in structuring the quieter solar regions.
G. Cauzzi, Reardon, KP, K. P. Reardon, A. Vecchio, Cauzzi, G, Vecchio, Alberto   +5 more
core   +1 more source

Near infrared observations of solar chromosphere [PDF]

, 2015
Includes bibliographical references (leaves 30-31)The solar chromosphere is an excellent medium to explore the intricate interplay between plasma and magnetic fields in a regime where both are relevant and alternately dominant.
Tejomoortula, Usha Sree
core  

Propagation of alfvénic waves from corona to chromosphere and consequences for solar flares [PDF]

, 2013
How do magnetohydrodynamic waves travel from the fully ionized corona, into and through the underlying partially ionized chromosphere, and what are the consequences for solar flares?
Fletcher, L., Russell, A.J.B., Russell, A. J. B.   +2 more
core   +1 more source

Slow Solar Wind: Origin in an Independent Small‐Scale Solar Dynamo

Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.
Abstract Separation of the solar wind (SW) into three flow types (coronal mass ejections (CMEs), high speed streams (HSSs), and slow solar wind (SSW)) reveals an inverse relationship between the percentage of time Earth spends in SSW during a year and its annually averaged magnetic field strength (B).
E. W. Cliver, I. G. Richardson, S. F. Martin   +2 more
wiley   +1 more source

Solar wind Acceleration from the Upper Chromosphere to the Corona in Coronal Hole Regions [PDF]

, 1998
The dynamic behavior of the plasma in the chromosphere/transition region /inner corona is vital for the acceleration of the solar wind. With new theoretical descriptions of the solar atmosphere and corona, and the increased observational possibilities ...
Esser, Ruth
core   +1 more source

The emergence of magnetic flux through a partially ionised solar atmosphere [PDF]

, 2006
We present results from 2.5D numerical simulations of the emergence of magnetic flux from the upper convection zone through the photosphere and chromosphere into the corona. Certain regions of the solar atmosphere are at sufficiently low temperatures to be
J. E. Leake, T. D. Arber, Leake, J. E. (James E.), Arber, T. D.   +3 more
core   +1 more source

3-D hydrodynamic simulations of the solar chromosphere [PDF]

, 2003
We present first results of three-dimensional numerical simulations ofthe non-magnetic solar chromosphere, computed with the radiationhydrodynamics code CO5BOLD.
Wedemeyer, S., Holweger, H., Holweger, Hartmut, Wedemeyer, Sven,, Steffen, Matthias, Freytag, Bernd,, Freytag, B., Steffen, M., Ludwig, Hans-Günter   +8 more
core   +1 more source

Identifying Plasma Fractionation Processes in the Chromosphere Using IRIS

The Astrophysical Journal
The composition of the solar corona differs from that of the photosphere, with the plasma thought to fractionate in the solar chromosphere according to the first ionization potential (FIP) of the different elements.
David M. Long, Deborah Baker, Andy S. H. To, Lidia van Driel-Gesztelyi, David H. Brooks, Marco Stangalini, Mariarita Murabito, Alexander W. James, Mihalis Mathioudakis, Paola Testa   +9 more
doaj   +1 more source

Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes [PDF]

, 2013
We present observational evidence for the presence of MHD (magnetohydrodynamic) waves in the solar photosphere deduced from SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) Dopplergram velocity observations.
Shelyag, S., Thompson, Michael John, Zharkov, Sergei, Zharkov, S., M. J. Thompson, Fedun, V., S. Zharkov, Shelyag, Sergiy, Erdélyi, Robert, R. Erdélyi, Erdelyi, R., S. Shelyag, V. Fedun, Fedun, Viktor, Thompson, M.J.   +14 more
core   +1 more source