77 citations · 406 across the 34 of their papers we have counts for
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Distribution of Magnetic Shear Angle in an Emerging Flux Region
Sanjay Gosain
We study the distribution of magnetic shear in an emerging flux region using the high-resolution Hinode/SOT SP observations. The distribution of mean magnetic shear angle across th…
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…
On the estimate of magnetic non-potentiality of sunspots derived using Hinode SOT/SP observations: Effect of polarimetric noise
Sanjay Gosain, Sanjiv Kumar Tiwari, P. Venkatakrishnan
The accuracy of Milne-Eddington (ME) inversions, used to retrieve the magnetic field vector, depends upon the signal-to-noise ratio (SNR) of the spectro-polarimetric observations.…