The Astrophysical JournalDuring solar cycle minimum, polar coronal holes show a prominent radio brightening cap. The analysis of polar microwave enhanced radiation in polar coronal holes is helpful for understanding the magnetic field characteristics and the origin of the solar ...
Jing Huang +6 more
doaj +1 more source
Giant Postflare Loops in Active Regions with an Extremely Strong Coronal Magnetic Field
The Astrophysical JournalWe report for the first time the detection of thermal free–free emission from post-flare loops at 34 GHz in images from the Nobeyama Radioheliograph. We studied eight loops, seven of which were from regions with an extremely strong coronal magnetic field
Costas E. Alissandrakis +4 more
doaj +1 more source
The Diagnostic Temperature Discrepancy as Evidence for Non-Maxwellian Coronal Electrons
The Open Journal of AstrophysicsTwo independent electron temperature diagnostics applied to the quiet solar corona yield systematically different results. Radio brightness temperatures from the Nançay Radioheliograph indicate Tₑ ≈ 0.6 MK, while hydrostatic scale-height modeling of the ...
Victor Edmonds
doaj +1 more source
Restoration of solar images by the Steer algorithm
, 2003 Restoration of diffuse features and computational time have been more serious problems in solar observations than in non-solar observations because of complicated brightness structures in enormous time-series images.
H. Koshiishi
core +1 more source
Long-term Solar Activity Studies using Microwave Imaging Observations and Prediction for Cycle 25. [PDF]
J Atmos Sol Terr Phys, 2018 Gopalswamy N +3 more
europepmc +1 more source
The behavior of the spotless active regions during the solar minimum 23-24
, 2016 In this work, we analysed the physical parameters of the spotless actives regions observed during solar minimum 23 – 24 (2007 – 2010). The study was based on radio maps at 17 GHz obtained by the Nobeyama Radioheliograph (NoRH) and magnetograms provided ...
Caius Lucius Selhorst +1 more
core +1 more source
Lambda 8-CM Solar Maps Observed with the RSIP, A Real-Time Multi-Channel Digital Correlator Backend Installed to the Radioheliograph at Toyokawa [PDF]
1987-03-25The lambda 8-cm radioheliograph at Toyokawa has been improved with respect to sensitivity and time resolution by the introduction of a new real-time digital correlator backend, which is called RSIP (Real-Time Solar Image Processor ...
ENOME, Shinzo +5 more
core
Loss-cone instability modulation due to a magnetohydrodynamic sausage mode oscillation in the solar corona. [PDF]
Nat Commun, 2019 Carley EP +6 more
europepmc +1 more source
Automatic detection of limb prominences in 304 Å EUV images [PDF]
, 2010 A new algorithm for automatic detection of prominences on the solar limb in 304 Å EUV images is presented, and results of its application to SOHO/EIT data discussed.
Labrosse, N., Dalla, S., Marshall, S.
core
On-Disc Observations of Flux Rope Formation Prior to Its Eruption. [PDF]
Sol Phys, 2017 James AW +8 more
europepmc +1 more source