Results 91 to 100 of about 2,470 (205)

Can XMM‐Newton Be Used to Track Compositional Changes in the Solar Wind?

Journal of Geophysical Research: Space Physics, Volume 129, Issue 12, December 2024.
Abstract Geocoronal Solar Wind Charge Exchange (SWCX) is the process by which heavy ions from the solar wind undergo charge exchange with neutral hydrogen atoms from the Earth's exosphere, releasing photons at discrete energies characteristic of the solar wind ions. This paper investigates the solar wind types driving geocoronal SWCX.
S. Nitti, J. A. Carter, S. F. Sembay, S. E. Milan, L. Zhao, S. T. Lepri, K. D. Kuntz   +6 more
wiley   +1 more source

Analysis of WISPR Images of the Near-Sun Heliospheric Current Sheet Region from Parker Solar Probe Encounters 4 and 5 and Comparison with the in Situ Observations

The Astrophysical Journal
We present an analysis of Wide-field Imager for Solar PRobe (WISPR) images of the near-Sun heliospheric current sheet (HCS) region from the Parker Solar Probe (PSP) in 2020 January and June.
Paulett C. Liewer, Samuel T. Badman, Mark Linton, T. D. Phan, Guillermo Stenborg, Angelos Vourlidas   +5 more
doaj   +1 more source

A Drag-force Analysis of Solar Wind White-light Tracers in the Inner Heliosphere

The Astrophysical Journal
We studied the propagation of blobs, which are a subset of density mesoscale structures observed in the solar corona. The detection of blobs in white-light data was performed during Solar Cycle 23.
Cynthia López-Portela, Mari Paz Miralles, Alejandro Lara   +2 more
doaj   +1 more source

Dynamics and energetics of the solar corona [PDF]

The primary objective of this research program is to improve our understanding of the dynamics and energetics of the solar corona both in the quiescent dynamic equilibrium state when coronal structure is dominated by the equatorial streamer belt and in ...
Steinolfson, R. S.
core   +1 more source

Quasi-Periodic Releases of Streamer Blobs and Velocity Variability of the Slow Solar Wind near the Sun

, 2009
We search for persistent and quasi-periodic release events of streamer blobs during 2007 with the Large Angle Spectrometric Coronagraph on the \textit{Solar and Heliospheric Observatory} and assess the velocity of the slow solar wind along the plasma ...
A.B. Galvin, A.R. Breen, D.J. McComas, E. Endeve, E. Endeve, G. Einaudi, G. Lapenta, G.E. Brueckner, H. Q. Song, K. Liu, L. D. Xia, L. Strachan, L.C. Lee, M.L. Kaiser, N.R. Sheeley, R. Woo, R.R. Grail, S. W. Feng, S. Wang, S.R. Cranmer, S.R. Habbal, S.T. Suess, S.T. Wu, X. Li, Y. Chen, Y. Chen, Y.M. Wang, Y.M. Wang   +27 more
core   +1 more source

Radio Signature of the Strong Compression between a Streamer and a Coronal Hole Boundary

The Astrophysical Journal Letters
We present evidence of the first detection of the radio signature at metric wavelengths of the strong compression between a helmet streamer (HS) and the boundary of a coronal hole (CH) using radio observations from the Callisto MEXICO-LANCE and ALASKA ...
E. Aguilar-Rodriguez, A. Vourlidas, P. Corona-Romero, C. Monstein, W. D. Reeve, E. Romero-Hernandez, E. Andrade-Mascote, P. Villanueva-Hernandez, I. A. Peralta-Mendoza, J. E. Perez-Leon, E. Perez-Tijerina   +10 more
doaj   +1 more source

The Coronal Plasma Density Structure over a Solar Cycle: A Comparison of Tomography and Magnetohydrodynamic Simulations

The Astrophysical Journal
The large-scale plasma density structure of the extended solar corona is a tracer of the underlying magnetic field configuration and dictates the structure of the solar wind in interplanetary space.
Liam T. Edwards, Huw Morgan, Pete Riley, Jon A. Linker   +3 more
doaj   +1 more source

Coronal Diagnostics from Narrowband Images around 30.4 nm

, 2012
Images taken in the band centered at 30.4 nm are routinely used to map the radiance of the He II Ly alpha line on the solar disk. That line is one of the strongest, if not the strongest, line in the EUV observed in the solar spectrum, and one of the few ...
A. Fludra, A. Pietarila, A.F. Thernisien, A.M. Vásquez, A.P. Hayes, A.R. Breen, D. Telloni, D. Telloni, D. Telloni, E. Antonucci, E. Antonucci, E.C. Sittler Jr., E.C. Sittler Jr., G. Del Zanna, G. Del Zanna, G. Del Zanna, G. Del Zanna, G. Del Zanna, G. Del Zanna, G. Del Zanna, G. Noci, G.E. Brueckner, G.L. Withbroe, H.C. van de Hulst, J.-P. Delaboudinière, J.C. Raymond, J.L. Kohl, J.L. Kohl, J.L. Phillips, K. Saito, K.P. Dere, K.P. Dere, M. Asplund, M. Guhathakurta, M. Guhathakurta, N.R. Sheeley Jr., P. Bochsler, P.G. Judge, P.R. Young, R. von Steiger, R.A. Harrison, R.H. Munro, R.J. Thomas, R.R. Grall, S. Fineschi, S. Fineschi, S.D. Jordan, S.E. Gibson, S.R. Cranmer, T. Wang, U. Feldman, V. Andretta, V. Andretta, W.T. Thompson, Y. Leblanc, Y.-K. Ko   +55 more
core   +1 more source

The solar wind heavy ion composition in the ascending phases of the solar cycles 23 and 25

Frontiers in Astronomy and Space Sciences
The approximately 11-year solar cycle has been shown to impact the heavy ion composition of the solar wind, even when accounting for streams of differing speeds; however, the heavy ion composition observed between the same specific phases of a past solar
D. T. Carpenter, S. T. Lepri, L. Zhao, R. M. Dewey, J. M. Raines, S. Livi, S. Livi, A. B. Galvin, L. M. Kistler   +8 more
doaj   +1 more source

X-Ray flares in Orion Young Stars. II. Flares, Magnetospheres, and Protoplanetary Disks

, 2008
We study the properties of powerful X-ray flares from 161 pre-main sequence (PMS) stars observed with the Chandra X-ray Observatory in the Orion Nebula region.
Alef W., Benz A. O., Birk G. T., Eric D. Feigelson, Franciosini E., Getman K. V., Getman K. V., Giusi Micela, Gordon P. Garmire, Gregory S. G., Hiei E., Imanishi K., Isobe H., Jardine M., Konstantin V. Getman, Lovelace R. V. E., Maggio A., Moira M. Jardine, Reale F., Scott G. Gregory, Siess L., Stelzer B.   +21 more
core   +1 more source