132 citations · 3.1k across the 125 of their papers we have counts for
11 papers · 1 filter
Association of Plages With Sunspots: A multi wavelength Study Using Kodaikanal Ca K and Greenwich sunspot area Data
Sudip Mandal, Subhamoy Chatterjee, Dipankar Banerjee
Plages are the magnetically active chromospheric structures prominently visible in Ca K line (3933.67 Å). A plage may or may not be associated with a sun…
Rise and fall of the dust shell of the classical nova V339 Delphini
A. Evans, D. P. K. Banerjee, R. D. Gehrz +16
We present infrared spectroscopy of the classical nova V339 Delphini, obtained over a year period. The infrared emission lines were initially symmetrical, with HWHM velocit…
Solar Active Longitudes From Kodaikanal White-light Digitized Data
Sudip Mandal, Subhamoy Chatterjee, Dipankar Banerjee
The study of solar active longitudes has generated a great interest in the recent years. In this work we have used an unique continuous sunspot data series obtained from Kodaikanal…
Transverse oscillations in a coronal loop triggered by a jet
S. Sarkar, V. Pant, A. K. Srivastava +1
We detect and analyse transverse oscillations in a coronal loop, lying at the south east limb of the Sun as seen from the \textit{Atmospheric Imaging Assembly} (AIA) onboard \texti…
Unravelling the components of a multi-thermal coronal loop using magnetohydrodynamic seismology
S. Krishna Prasad, D. B. Jess, J. A. Klimchuk +1
Coronal loops, constituting the basic building blocks of the active Sun, serve as primary targets to help understand the mechanisms responsible for maintaining multi-million Kelvin…
Simultaneous longitudinal and transverse oscillation in an active filament
V. Pant, R. Mazumder, D. Yuan +3
We report on the co-existence of longitudinal and transverse oscillations in an active filament. On March 15 2013, a M1.1 class flare was observed in the active region AR 11…
Sunspot Sizes and The Solar Cycle: Analysis Using Kodaikanal White-light Digitized Data
Sudip Mandal, Dipankar Banerjee
Sizes of the sunspots vary in a wide range during the progression of a solar cycle. Long-term variation study of different sunspot sizes are key to better understand the underlying…
Reflection Of Propagating Slow Magneto-acoustic Waves In Hot Coronal Loops : Multi-instrument Observations and Numerical Modelling
Sudip Mandal, Ding Yuan, Xia Fang +3
Slow MHD waves are important tools for understanding the coronal structures and dynamics. In this paper, we report a number of observations, from X-Ray Telescope (XRT) on board HIN…
Solar coronal magnetic fields derived using seismology techniques applied to omnipresent sunspot waves
D. B. Jess, V. E. Reznikova, R. S. I. Ryans +9
Sunspots on the surface of the Sun are the observational signatures of intense manifestations of tightly packed magnetic field lines, with near-vertical field strengths exceeding 6…
Statistical study of network jets observed in the solar transition region: A comparison between coronal holes and quiet sun regions
Nancy Narang, Rebecca T. Arbacher, Hui Tian +4
Recent IRIS observations have revealed a prevalence of intermittent small-scale jets with apparent speeds of 80 - 250 km s, emanating from small-scale bright regions inside…
Forward Modelling of Propagating Slow Waves in Coronal Loops and Their Frequency-Dependent Damping
Sudip Mandal, Norbert Magyar, Ding Yuan +2
Propagating slow waves in coronal loops exhibit a damping which depends upon the frequency of the waves. In this study we aim to investigate the relationship of the damping length…