Results 111 to 120 of about 1,202,560 (191)

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

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

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

Unravelling the nonthermal emissions from the quiet solar corona with the SKA

Investigation of the nonthermal emissions from the quiet solar corona has been rather limited. This primarily stems from the fact that the emission is expected to be quite weak and very high dynamic range images are required to detect such emissions. Although, the few detections of the nonthermal emissions have all come from the radio band, the past ...
Mondal, Surajit, Oberoi, Divya, Sharma, Rohit, Zhang, Peijin, Kansabanik, Devojyoti, Chen, Xingyao, Kontar, Eduard   +6 more
openaire   +2 more sources

Source Region of the Solar Wind: Statistics of the Doppler Velocities at the Chromosphere

The Astrophysical Journal Letters
The solar wind has been extensively studied recently with in situ observations, and the understanding of its counterpart near the solar surface has also progressed significantly.
Fu Yu, Shihao Rao, Jie Zhao, Chuan Li, Yang Su, Jinsong Zhao, Ye Qiu, Mingde Ding, Cheng Fang, Hui Li, Weiqun Gan   +10 more
doaj   +1 more source

What Determines the Brightness of the Magnetically Open Solar Corona?: Insights from Three-dimensional Radiative Magnetohydrodynamic Simulations and Observations

The Astrophysical Journal
We investigate the relationship between solar coronal holes and open-field regions using three-dimensional radiative magnetohydrodynamic simulations combined with remote-sensing observations from the Solar Dynamics Observatory (SDO).
Haruhisa Iijima
doaj   +1 more source

3D MHD Simulations of Coronal Loops Heated via Magnetic Braiding. I. Continuous Driving

The Astrophysical Journal
The nature and detailed properties of the heating of the million-degree solar corona are important issues that are still largely unresolved. Nanoflare heating might be dominant in active regions and quiet Sun, although direct signatures of such small ...
G. Cozzo, Paola Testa, J. Martinez-Sykora, F. Reale, P. Pagano, F. Rappazzo, V. Hansteen, B. De Pontieu, A. Petralia, E. Alaimo, F. Fiorentino, F. D’Anca, L. Sciortino, M. Todaro, U. Lo Cicero, M. Barbera   +15 more
doaj   +1 more source

Modeling Metric Gyrosynchrotron Radio Emission From the Quiet Solar Corona

The radio emission of the quiet Sun in the metric and decametric bands has not been well studied historically due to limitations of existing instruments. It is nominally dominated by thermal brehmsstrahlung of the solar corona, but may also include significant gyrosynchrotron emission, usually assumed to be weak under quiet conditions. In this work, we
Kozarev, Kamen, Nedal, Mohamed
openaire   +2 more sources