Abstract In solar physics, it is a big challenge to measure the magnetic fields directly from observations in upper atmosphere, including chromosphere and corona. Radio are regarded as most feasible approach diagnose field However, because of complexity diversity emission mechanisms, previous studies have only presented implicit diagnostic functions for specific mechanism radio observations. Th...

Microwave maps may provide critical information on the flux rope interaction and breakout eruption if their polarization is measured with high precision. We demonstrate this diagnostic capability using 17 GHz from Nobeyama Radioheliograph (NoRH) of a circular ribbon flare SOL2014-12-17T04:51. The EUV images SDO/AIA coronal magnetic field extrapolated HMI magnetogram are also used to support int...

introduction: the purpose of this in vitro study was to compare the coronal seal of four temporary filling materials, coltosol, zonalin, zamherir, and intermediate restorative material (irm) by the india ink dye penetration test. materials and methods: endodontic access preparations were prepared in 120 extracted intact human premolars. the teeth were randomly divided into six groups including ...

Heating signatures from small-scale magnetic reconnection events in the solar atmosphere have proven to be difficult detect through observations. Numerical models that reproduce flaring conditions are essential understanding of how nanoflares may act as a heating mechanism corona. We study effects non-thermal electrons synthetic spectra 1D hydrodynamic RADYN simulations nanoflare heated loops i...

Getman et al. report the discovery, energetics, frequencies, and effects on environs of >1000 X-ray superflares with energies EX ∼ 1034–1038 erg from pre-main-sequence (PMS) stars identified in Chandra MYStIX SFiNCs surveys. Here we perform detailed plasma evolution modeling 55 bright MYStIX/SFiNCs these events. They constitute a large sample most powerful stellar flares analyzed uniform fashio...

We study the intensity, modulation depth and mean of gyrosynchrotron (GS) radiation as a function frequency line sight (LOS) in fast sausage modes. By solving 2.5D MHD ideal equations straight coronal loop considering chromosphere with typical flaring plasma parameters we analyse wavelet transform density GS emission for different radio frequencies spatial resolutions, given impulsive general p...

We present a detailed X-ray analysis and imaging of stellar coronae five coronally connected eclipsing binaries, namely, 44 Boo, DV Psc, ER Vul, XY UMa, TX Cnc. Both components these binaries are found to be active. The light curves detached semidetached type systems show eclipsed-like features, whereas no evidence for coronal is shown by the contact systems. curve Psc shows O'Connell-like effe...

Abstract We explore the processes of repetitive buildup and explosive release magnetic energy, together with formation flux ropes, which eventually resulted in three homologous eruptive flares successively increasing intensities (i.e., M2.0, M2.6, X1.0). The originated from NOAA active region 12017 between 2014 March 28 29. EUV observations magnetogram measurements, coronal field modeling, sugg...

Magnetic helicity (MH) is a measure of twist and shear magnetic field. MH injected in the active region (AR) corona through photospheric footpoint motions causing twisted sheared fields. From conservation property helicity, it was conjectured that an already flux rope (FR) with continuous injection inevitably erupts to remove excess accumulated coronal helicity. Therefore, understanding nature ...