Results 11 to 20 of about 2,802,659 (186)

Coronal Mass Ejections and Type II Radio Emission Variability during a Magnetic Cycle on the Solar-type Star ϵ Eridani [PDF]

The Astrophysical Journal, 2022
International audienceWe simulate possible stellar coronal mass ejection (CME) scenarios over the magnetic cycle of ϵ Eridani (18 Eridani; HD 22049).
Morin, J., Jeffers, S., Jeffers, Sandra V., Kavanagh, Robert D., Morin, Julien, Kavanagh, R.D., Ó Fionnagáin, D., Ó Fionnagáin, Dúalta, Petit, P., Marsden, Stephen, Golden, Aaron, Marsden, S., Kavanagh, R., Vidotto, Aline A., Vidotto, A., Jeffers, S.V., Petit, Pascal, Golden, A., De Almeida Vidotto, A., Sandra V. Jeffers, Stephen Marsden, Pascal Petit, Aline A. Vidotto, Robert D. Kavanagh, Dúalta Ó Fionnagáin, Aaron Golden, Julien Morin   +26 more
core   +7 more sources

Oscillation of solar radio emission at coronal acoustic cut-off frequency [PDF]

Astronomy & Astrophysics, 2017
Recent SECCHI COR2 observations on board STEREO-A spacecraft have detected density structures at a distance of 2.5–15 R0 propagating with periodicity of about 90 min.
M. Panchenko, O. S. Pylaev, V. N. Melnik, A. Hanslmeier, T. V. Zaqarashvili, A. I. Brazhenko   +5 more
core   +3 more sources

New Results on the Direct Observations of Thermal Radio Emission from a Solar Coronal Mass Ejection [PDF]

Geophysical Research Letters, 2021
We report observations of thermal emission from the frontal structure of a coronal mass ejection (CME) using data obtained with the Gauribidanur RAdioheliograPH simultaneously at 80 and 53 MHz on May 1, 2016.
R. Ramesh, D. Ketaki, A. Kumari, Ketaki, D., Ramesh, R., C. Kathiravan, Kumari, A., T. J. Wang, Wang, T. J., Kathiravan, C.   +9 more
core   +5 more sources

Solar energetic particles and radio burst emission [PDF]

Journal of Space Weather and Space Climate, 2017
We present a statistical study on the observed solar radio burst emission associated with the origin of in situ detected solar energetic particles. Several proton event catalogs in the period 1996–2016 are used.
Miteva Rositsa, Samwel Susan W., Krupar Vratislav   +2 more
doaj   +3 more sources

Bursts of kinetic Alfvén waves and coronal radio emission at 2-3 solar radii

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), 2015
Solar radio observations at 10-30 MHz have been carried out recently using radio telescopes UTR-2 (world's largest radio telescope at decametric wavelengths near Kharkov, Ukraine) and Uran-2 (Poltava, Ukraine).
Melnik, V., URSI, Pierrard, Viviane, Voitenko, Y.   +3 more
core   +2 more sources

Isolated Sunspot with a Dark Patch in the Coronal Emission

Open Astronomy, 2012
On the base of the 17 GHz radio maps of the Sun taken with the Nobeyama Radio Heliograph we estimate plasma parameters in the specific region of the sunspot atmosphere in the active region AR 11312.
Bezrukov D. A., Ryabov B. I., Shibasaki K.   +2 more
doaj   +2 more sources

A correlation Study of Coronal EUV Brightenings and Radio Emission Observed by Parker Solar Probe

, 2019
International audienceThe dynamic nature of our host star is clearly observable in the solar corona. Different structures are visible in it (coronal loops, streamers, coronal holes), which have a direct relationship with changes that the Sun is ...
Dudok de Wit, Thierry, Harvey, P., Bonnell, J. W., Macdowall, R. J., Pulupa, M., Malanushenko, A. V., Guevara Gómez, J. C., Martinez Oliveros, J. C., Goetz, K., Malaspina, D., Bale, S.   +10 more
core   +5 more sources

AN ANALYSIS OF INTERPLANETARY SOLAR RADIO EMISSIONS ASSOCIATED WITH A CORONAL MASS EJECTION [PDF]

The Astrophysical Journal Letters, 2016
ABSTRACT Coronal mass ejections (CMEs) are large-scale eruptions of magnetized plasma that may cause severe geomagnetic storms if Earth directed. Here, we report a rare instance with comprehensive in situ and remote sensing observations of a CME combining white-light, radio, and plasma measurements from four different vantage points. For
Krupar, V., Eastwood, J., Kruparova, O., Santolík, O., Soucek, J., Magdalenić, J., Vourlidas, A., Maksimovic, M., Bonnin, X., Bothmer, V., Mrotzek, N., Pluta, A., Barnes, D., Davies, J., Oliveros, J., Bale, S.   +15 more
openaire   +6 more sources

Investigating Alfvénic wave propagation in coronal open-field regions [PDF]

, 2015
The physical mechanisms behind accelerating solar and stellar winds are a long-standing astrophysical mystery, although recent breakthroughs have come from models invoking the turbulent dissipation of Alfvén waves.
Morton, Richard, Tomczyk, Steve, Pinto, Rui   +2 more
core   +1 more source

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   +2 more sources