Results 1 to 10 of about 150 (116)

Coronal Streamers Revealed during Solar Eclipses: Seeing is not Believing, and Pictures Can Lie [PDF]

i-Perception, 2011
For those fortunate enough to have personally witnessed and photographed the visible corona surrounding the Sun during a solar eclipse, pictures are usually a let down for not living up to the visual view.
Richard Woo
doaj   +3 more sources

Sources of solar wind over the solar activity cycle [PDF]

Journal of Advanced Research, 2013
Fast solar wind has been recognized, about 40 years ago, to originate in polar coronal holes (CHs), that, since then, have been identified with sources of recurrent high speed wind streams.
Giannina Poletto
doaj   +2 more sources

Coronal Streamer Brightness Profiles Investigated With BriLo Using Parker Solar Probe White-Light Data [PDF]

Solar Physics
Cappello GM, Temmer M, Lienhart A, Nisticò G, Stenborg G, Linton MG, De Leo Y, Heinemann SG, Liewer PC, Howard RA, Bothmer V.   +10 more
exaly   +2 more sources

COCONUT, a Novel Fast-converging MHD Model for Solar Corona Simulations. II. Assessing the Impact of the Input Magnetic Map on Space-weather Forecasting at Minimum of Activity

The Astrophysical Journal, 2023
This paper is dedicated to the new implicit unstructured coronal code COCONUT, which aims at providing fast and accurate inputs for space-weather forecasting as an alternative to empirical models.
Barbara Perri, Błażej Kuźma, Michaela Brchnelova, Tinatin Baratashvili, Fan Zhang, Peter Leitner, Andrea Lani, Stefaan Poedts   +7 more
doaj   +1 more source

Three-dimensional multi-fluid model of a coronal streamer belt with a tilted magnetic dipole [PDF]

Annales Geophysicae, 2015
Observations of streamers in extreme ultraviolet (EUV) emission with SOHO/UVCS show dramatic differences in line profiles and latitudinal variations in heavy ion emission compared to hydrogen Ly-α emission. In order to use ion emission observations of
L. Ofman, L. Ofman, L. Ofman, E. Provornikova, E. Provornikova, L. Abbo, S. Giordano   +6 more
doaj   +1 more source

Structure of the Plasma near the Heliospheric Current Sheet as Seen by WISPR/Parker Solar Probe from inside the Streamer Belt

The Astrophysical Journal, 2023
Parker Solar Probe (PSP) crossed the heliospheric current sheet (HCS) near the perihelion on encounters E8 and E11, enabling the Wide-field Imager for Solar Probe (WISPR) to image the streamer belt plasma in high resolution while flying through it.
Paulett C. Liewer, Angelos Vourlidas, Guillermo Stenborg, Russell A. Howard, Jiong Qiu, Paulo Penteado, Olga Panasenco, Carlos R. Braga   +7 more
doaj   +1 more source

A New Numerical Implementation for Solar Coronal Modeling by an HLL Generalized Riemann Problem Solver

The Astrophysical Journal Supplement Series, 2023
In this paper, we employ a Harten–Lax–van Leer (HLL) generalized Riemann problem (HLL-GRP) solver within the framework of a finite volume method to model 3D solar coronal structures for the first time.
Mengqing Liu, Man Zhang, Xiaojing Liu, Fang Shen   +3 more
doaj   +1 more source

Oxygen abundance in coronal streamers during solar minimum [PDF]

Annales Geophysicae, 2001
We present a study of the oxygen abundance relative to hydrogen in the equatorial streamer belt of the solar corona during the recent period of activity minimum.
D. Marocchi, E. Antonucci, S. Giordano, S. Giordano   +3 more
doaj   +1 more source

First Infrared Coronal Spectra from DKIST/Cryo-NIRSP: Comparisons with Global MHD Models

The Astrophysical Journal, 2023
The Cryogenic Near-Infrared Spectropolarimeter (Cryo-NIRSP) is now conducting science operations at the National Science Foundation’s Daniel K. Inouye Solar Telescope (DKIST).
Thomas A. Schad, Jeffrey R. Kuhn, Andre Fehlmann, Isabelle F. Scholl, David Harrington, Thomas Rimmele, Alexandra Tritschler   +6 more
doaj   +1 more source

Graphical evidence for the solar coronal structure during the Maunder minimum: comparative study of the total eclipse drawings in 1706 and 1715

Journal of Space Weather and Space Climate, 2021
We discuss the significant implications of three eye-witness drawings of the total solar eclipse on 1706 May 12 in comparison with two on 1715 May 3, for our understanding of space climate change.
Hayakawa Hisashi, Lockwood Mike, Owens Matthew J., Sôma Mitsuru, Besser Bruno P., van Driel-Gesztelyi Lidia   +5 more
doaj   +1 more source