Cygnus X-3, among the X-ray binaries, is one of the brightest in the radio band, repeatedly exhibiting huge radio flares. The X-ray spectra shows two definite states, low (correspondingly hard) and high (correspondingly soft). During the hard state the X-ray spectra shows a pivoting behaviour correlated to the radio emission. In the high state the X-ray spectra shows a gamut of behaviour which ...

We present high resolution ( 0.2′′) AO-corrected coronographic near-infrared imaging on the early-type Herbig Be star MWC 297. X-ray flaring has been reported towards this young object, however this has been difficult to reconcile with its early spectral type (B1.5) and relatively high mass (∼10 M ). Our infrared and X-ray analysis shows that the X-ray flaring is likely due to a late-type star ...

Abstract Violent solar flares and coronal mass ejections (CMEs) are magnetic phenomena. However, how fields reconnecting in the flare differ from nonflaring remains unclear owing to lack of studies properties. Here we present a first statistical study flaring (highlighted by ribbons) vector photosphere. Our systematic approach allows us describe key physical properties magnetism, including dist...

Aims. This work aims to detect and classify stellar flares potential coronal mass ejection (CME) signatures in optical spectra provided by the Sloan Digital Sky Survey (SDSS) data release 14. The sample is constrained all F, G, K, M main-sequence type stars, resulting more than 630 000 stars. makes use of individual spectral exposures SDSS. Methods. An automatic flare search was performed detec...

Abstract We report a detailed analysis of failed eruption and flare in active region 12018 on 2014 April 3 using multiwavelength observations from the Solar Dynamics Observatory/Atmospheric Imaging Assembly, IRIS, STEREO, Hinode/Solar Optical Telescope. At least four jets were observed to emanate cusp this small (large bright point) with null-point topology during 2 hr prior slow rise filament....

Abstract Many stars of different spectral types with planets in the habitable zone are known to emit flares. Until now, studies that address long-term impact stellar flares and associated coronal mass ejections (CMEs) assumed planet’s interior remains unaffected by interplanetary CMEs, only considering effect plasma/UV interactions on atmosphere planets. Here, we show magnetic flux carried flar...

Abstract Magnetic helicity is a measure of the entanglement magnetic field lines used to characterize complexity solar active region (AR) fields. Previous attempts use helicity-based indicators predict eruptive/flaring events have shown promise but not been universally successful. Here we investigate quantity associated with helicity, winding, as means flaring activity. This represents fundamen...