53 citations · 262 across the 17 of their papers we have counts for
17 papers
Evolution of Currents of Opposite Signs in the Flare Productive Solar Active Region NOAA 10930
B. Ravindra, P. Venkatakrishnan, Sanjiv Kumar Tiwari +1
Analysis of a time series of high spatial resolution vector magnetograms of the active region NOAA 10930 available from SOT/SP on-board Hinode revealed that there is a mixture of u…
Evolution of Magnetic Field Twist and Tilt in Active Region NOAA 10930
B. Ravindra, P. Venkatakrishnan, Sanjiv Kumar Tiwari
Magnetic twist of the active region has been measured over a decade using photospheric vector field data, chromospheric H_alpha data, and coronal loop data. The twist and tilt of t…
Evolution of twist-shear and dip-shear in Faring active region NOAA 10930
Sanjay Gosain, P. Venkatakrishnan
We study the evolution of magnetic shear angle in a flare productive active region NOAA 10930. The magnetic shear angle is defined as the deviation in the orientation of the observ…
Acoustic Power Absorption and its Relation with Vector Magnetic Field of a Sunspot
S. Gosain, S. K. Mathew, P. Venkatakrishnan
The distribution of acoustic power over sunspots shows an enhanced absorption near the umbra--penumbra boundary. Earlier studies revealed that the region of enhanced absorption coi…
Magnetic Non-Potentiality of Solar Active Regions and Peak X-Ray Flux of the Associated Flares
Sanjiv Kumar Tiwari, P. Venkatakrishnan, Sanjay Gosain
Predicting the severity of the solar eruptive phenomena like flares and Coronal Mass Ejections (CMEs) remains a great challenge despite concerted efforts for several decades. The a…
Evolution of twist-shear and dip-shear during X-class flare of 13 December 2006: Hinode observations
Sanjay Gosain, P. Venkatakrishnan
The non-potentiality (NP) of the solar magnetic fields is measured traditionally in terms of magnetic shear angle i.e., the angle between observed and potential field azimuth. Here…