Results 91 to 100 of about 1,272,533 (187)

Connecting the Low to High Corona: Propagating Disturbances as Tracers of the Near-Sun Solar Wind

The Astrophysical Journal
We revisit a quiet 14 day period of solar minimum during 2008 January and track substreamer propagating disturbances (PDs) from low heights in STEREO/EUVI to the extended corona through STEREO/COR1 and into STEREO/COR2 along nonradial paths that trace ...
Nathalia Alzate, Simone Di Matteo, Huw Morgan, Nicholeen Viall, Angelos Vourlidas   +4 more
doaj   +1 more source

Observations of the brightness temperature distribution of the quiet solar corona at decametric wavelengths [PDF]

, 1987
The brightness temperature distribution of the quiet solar corona at a wavelength of 8.9 meters is measured by two types of radio telescope: (1) a 'T' type array with a resolution of 26'X38', and (2) a fan beam interferometer with an E-W resolution of 3'.
Sastry, Ch. V.
core  

MHD simulations of coronal heating [PDF]

, 2015
The problem of heating the solar corona requires the conversion of magnetic energy into thermal energy. Presently, there are two promising mechanisms for heating the solar corona: wave heating and nanoflare heating.
Tam, Kuan V.
core   +1 more source

Solar cycle dependence of scaling in solar wind fluctuations [PDF]

, 2008
In this review we collate recent results for the statistical scaling properties of fluctuations in the solar wind with a view to synthesizing two descriptions: that of evolving MHD turbulence and that of a scaling signature of coronal origin that ...
B. Hnat, Hnat, B., Kiyani, K., S. C. Chapman, K. Kiyani, Chapman, S. C., Chapman, Sandra C.   +6 more
core   +2 more sources

Velocity and Density Fluctuations in the Quiet Sun Corona

The Astrophysical Journal
We investigate the properties and relationship between Doppler velocity fluctuations and intensity fluctuations in the off-limb quiet Sun corona. These are expected to reflect the properties of Alfvénic and compressive waves, respectively.
Michael Hahn, Xiangrong Fu, Stefan J. Hofmeister, Yifan Huang, Alexandros Koukras, Daniel Wolf Savin   +5 more
doaj   +1 more source

Picoflares in the Quiet Solar Corona: Solar Orbiter Observations Halfway to the Sun

13 pages, 7 figures, submitted to Astronomy & Astrophysics (A&A)
Podladchikova, O., Warmuth, A., Harra, L., Dolla, L., Verbeeck, C., Mierla, M., Rodriguez, L., Parenti, S., Georgoulis, M. K., Hofmeister, S. J., Engler, N., West, M. J., Veronig, A. M., Antolin, P., Purkhart, S., Long, D. M., Buchlin, É., Haberreiter, M., Zhukov, A. N., Safari, H., Battaglia, A. F., Soubrié, E., Büchel, V., Gissot, S., De Groof, A., Gyo, M., Halain, J. P., Inhester, B., Kraaikamp, E., Müller, D., Pfiffner, D., Rochus, P., Schuller, F., Smith, P. J., Schmutz, W., Stegen, K.   +35 more
openaire   +2 more sources

Correlated Quasiperiodic Pulsations in Type III Radio Bursts and Solar EUV Emission, Jetlets and Magnetic Fields: Comparisons of Intervals with and without Type III Storms

The Astrophysical Journal
Solar p -modes are ∼5 minute acoustic waves, which can be used as helioseismological diagnostics of the Sun’s subsurface. Recent studies relate them to quasiperiodic pulsations (QPPs) identified in X-rays, radio waves, and extreme ultraviolet (EUV ...
C. Cattell, L. Glesener, E. L. M. Hanson, Y. Kim, T. Mahaffey, R. B. Masek, M. Phillips, J. C. Buitrago-Casas, J. Martínez Oliveros, M. Pulupa, T. Ervin, S. Badman   +11 more
doaj   +1 more source

Metric and Decimetric Observations of the Quiet Solar Corona

, 2015
8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and ...
Marque, C., Lantos, P., Delouis, J. M., Alissandrakis, C.   +3 more
openaire   +1 more source

Chromospheric evaporation as the driver of helium enrichment in active region solar wind: A case study

Astronomy & Astrophysics
Context. The physical mechanisms of helium abundance (AHe) depletion in the corona and solar wind are closely linked to coronal heating, solar wind origin, and acceleration processes. The relationships between the AHe in the solar wind and the properties
Ma Chi, Fu Hui, Madjarska Maria S., Shi Xinzheng, Huang Zhenghua, Xia Lidong   +5 more
doaj   +1 more source

Full-disk spectroscopy of the solar corona across a solar cycle with Hinode/EIS

Frontiers in Astronomy and Space Sciences
The structure and dynamics of the solar corona evolve with the Sun’s magnetic cycle, yet how this variability manifests in the disk-integrated, Sun-as-a-star observables used in stellar activity studies remains poorly constrained. We compile 18 full-disk
James McKevitt, James McKevitt, Ignacio Ugarte-Urra, Peter R. Young, Peter R. Young   +4 more
doaj   +1 more source