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Browsing by Author "Banerjee, D"

Browsing by Author "Banerjee, D"

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  • Time-latitude distribution of prominences for 10 solar cycles: a study using Kodaikanal, Meudon, and Kanzelhohe data 
    Chatterjee, S; Manjunath, H; Banerjee, D; Ravindra, B; McIntosh, Scott W (Wiley-Blackwell Publishing Ltd, 2020-03)
    Solar prominences are structures of importance because of their role in polar field reversal. We study the long-term variation of the time latitude distribution of solar prominences in this article. To accomplish this, ...
  • Transition region counterpart of a moving magnetic feature 
    Lin, C. -H; Banerjee, D; O'Shea, E; Doyle, J. G (EDP Sciences, 2006-12)
    this which we seek to address in this work. Aims.In this work we aim to investigate the chromospheric and transition-region dynamics associated with a moving magnetic monopole by using spectral time-series and ...
  • Transition region small-scale dynamics as seen by SUMER on SOHO 
    Teriaca, L; Banerjee, D; Falchi, A; Doyle, J. G; Madjarska, M. S (EDP Sciences, 2004-12)
    High spectral, spatial and temporal resolution UV observations of the quiet Sun transition region show a highly structured and dynamical environment where transient supersonic flows are commonly observed. Strongly non-Gaussian ...
  • Transverse oscillations in a coronal loop triggered by a jet 
    Sarkar, S; Pant, V; Srivastava, A. K; Banerjee, D (Springer, 2016-11)
    We detect and analyse transverse oscillations in a coronal loop, lying at the south–east limb of the Sun as seen from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). The jet is believed ...
  • Triggering The Birth of New Cycle’s Sunspots by Solar Tsunami 
    Dikpati, M; McIntosh, S.W; Chatterjee, Subhamoy; Banerjee, D; Yellin-Bergovoy, Ron; Srivastava, A (Springer Nature, 2019-02-14)
    When will a new cycle’s sunspots appear? We demonstrate a novel physical mechanism, namely, that a “solar tsunami” occurring in the Sun’s interior shear-fluid layer can trigger new cycle’s magnetic flux emergence at high ...
  • Twisting/Swirling Motions during a Prominence Eruption as Seen from SDO/AIA 
    Pant, V; Datta, A; Banerjee, D; Chandrashekhar, K; Ray, S (IOP Publishing, 2018-06-10)
    A quiescent prominence was observed at the northwest limb of the Sun using different channels of the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. We report and analyze twisting/swirling motions ...
  • Unravelling the Components of a Multi-Thermal Coronal Loop Using Magnetohydrodynamic Seismology 
    Prasad, S. K; Jess, D. B; Klimchuk, J. A; Banerjee, D (IOP Publishing, 2017-01-10)
    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 temperatures in the solar and stellar ...
  • Variation of Emission LineWidth in Mid and High-Latitude Corona 
    Krishna Prasad, S; Singh, J; Banerjee, D (Springer, 2013-02)
    Spectroscopic studies of the solar corona, using the high spatial and spectral resolution 25-cm corona graph at the Norikura Solar Observatory for equatorial off-limb observations, indicated that the variation of radiance ...
  • Variation of line widths in coronal hole off-limb regions: evidence for long-term structuring in plumes 
    O'Shea, E; Banerjee, D; Doyle, G (European Space Agency, 2004-12)
    A detailed analysis of an off-limb polar region observed over a number of weeks by the Coronal Diagnostic Spectrometer (CDS), on board the SOHO spacecraft, is presented. Form a measurement of a number of coronal lines we ...
  • Variation of line widths in polar off-limb regions 
    Banerjee, D; O'Shea, E; Doyle, J. G (European Space Agency, 2005-12)
    Using measurement from the Coronal Diagnostic Spectrometer (CDS) on board SOHO we seek to examine the relative roles of radiative and Collisional excitation in regions far off-limb at the Northern pole of the sun. We study ...
  • Variation of supergranule parameters with solar cycles: results from century-long Kodaikanal digitized Ca II K data 
    Chatterjee, Subhamoy; Mandal, Sudip; Banerjee, D (IOP Publishing, 2017-05)
    The Ca ii K spectroheliograms spanning over a century (1907–2007) from Kodaikanal Solar Observatory, India, have recently been digitized and calibrated. Applying a fully automated algorithm (which includes contrast enhancement ...
  • Very long period activity at the base of solar wind streams 
    Popescu, M. D; Banerjee, D; O`Shea, E; Doyle, J. G; Xia, L. D (EDP Science, 2005-11)
    Using time series data of spectral lines originating from a wide range of temperatures in the solar transition region, above a polar coronal hole, from SUMER (Solar Ultraviolet Measurements of Emitted Radiation) on SoHO ...
  • Visible emission line coronagraph on Aditya-L1 
    Prasad, B. R; Banerjee, D; Singh, J; Nagabhushana, S; Amit Kumar; Kamath, P. U; Kathiravan, S; Venkata Suresh, Narra; Rajkumar, N; Natarajan, V; Juneja, Madhur; Somu, Pawan; Pant, V; Shaji, Nigar; Sankarsubramanian, K; Patra, Asit; Venkateswaran, R; Adoni, A. A; Narendra, S; Haridas, T. R; Mathew, S. K; Mohan Krishna, R; Amareswar, K; Jaiswa, Bhavesh (Indian Academy of Science, 2017-08-25)
    Solar coronagraph mimics total solar eclipse by blocking the solar disk and enabling the observation of extended coronal atmosphere of the Sun. Visible Emission Line Coronagraph (VELC), on-board Aditya-L1 space mission, ...
  • Wave leakage in a magnetized isothermal atmosphere 
    Banerjee, D; Hasan, S. S; Christensen-Dalsgaard, J (Astronomical Society of India, 1996)
    The present investigation is a continuation of earlier work by Hasan & christensen-Dalsgaard (1992) and Banerjee, Hasan & Christensen-Dalsgaard(1995), where the interaction of various elementary modes in a stratified ...
  • Waves in polar coronal holes 
    Banerjee, D (Springer, 2010)
    The fast solar wind originates from polar coronal holes. Recent observations from SoHO suggest that the solar wind is flowing from funnel-shaped magnetic fields anchored in the lanes of the magnetic network at the solar ...
  • X-Ray and Ultraviolet Flares on AT Microscopii Observed by AstroSat 
    Kuznetsov, A. A; Karakotov, R. R; Chandrashekhar, K; Banerjee, D (IOP Publishing, 2023-01)
    We present observations of the active M-dwarf binary AT Mic (dM4.5e+dM4.5e) obtained with the orbital observatory AstroSat. During 20 ks of observations, in the far-ultraviolet (130–180 nm) and soft X-ray (0.3–7 keV) spectral ...

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