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Browsing by Author "Banerjee, D"

Browsing by Author "Banerjee, D"

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  • The influence of radiative damping on the modes of a magnetized isothermal atmosphere 
    Banerjee, D; Hasan, S. S; Christensen-Dalsgaard, J (Kluwer Academic Publishers, 1997)
    We examine the influence of radiative damping on the modes of an isothermal magnetized plasma. This investigation is an extension of earlier work by Hasan & Christensen-Dalsgaard (1992) and Banerjee, Hasan & Christens ...
  • The inner coronagraph on board ADITYA-L1 and automatic detection of CMEs 
    Banerjee, D; Ritesh Patel; Pant, V; ADITYA Team (International Astronomical Union, 2017-07)
    Visible Emission Line Coronagraph (VELC) on board ADITYA-L1 is an internally occulted coronagraph with mirror as its primary objective element. It has a field of view (FOV) starting from 1.05 R –3R. It will observe the ...
  • An Insight into the coupling of CME kinematics in inner and outer corona and the imprint of source regions 
    Majumdar, Satabdwa; Ritesh Patel; Pant, V; Banerjee, D (IOP Publishing, 2021-10-01)
    Despite studying coronal mass ejections (CMEs) for several years, we do not yet have a complete understanding of their kinematics. To this end, it is essential to understand the change in kinematics of the CMEs as they ...
  • Intensity oscillation in the corona as observed during the Total Solar Eclipse of 29 March 2006 
    Singh, J; Hasan, S. S; Gupta, G. R; Banerjee, D; Muneer, S; Raju, K. P; Bagare, S. P; Srinivasan, R (Springer, 2009-11)
    We obtained the images of the eastern part of the solar corona in the Fe xiv 530.3 nm (green) and Fe x 637.4 nm (red) coronal emission lines during the total solar eclipse of 29 March 2006 at Manavgat, Antalya, Turkey. ...
  • Interference of the running waves at light bridges of a sunspot 
    Su, J. T; Ji, K. F; Banerjee, D; Cao, W. D; Priya, T. G; Zhao, J. S; Yu, S. J; Ji, H. S; Zhang, M (IOP Publishing, 2016-01-01)
    The observations of chromospheric oscillations of two umbral light bridges (LBs) within a sunspot from NOAA Active Region 12127 are presented. It was found that the running umbral waves with periods of 2.2–2.6 minutes ...
  • Investigating Width Distribution of Slow and Fast CMEs in Solar Cycles 23 and 24 
    Pant, V; Majumdar, S; Patel, R; Chauhan, A; Banerjee, D; Gopalswamy, N (Frontiers, 2021-05)
    Coronal Mass Ejections (CMEs) are highly dynamic events originating in the solar atmosphere, that show a wide range of kinematic properties and are the major drivers of the space weather. The angular width of the CMEs ...
  • Jets in polar coronal holes 
    Scullion, E; Popescu, M. D; Banerjee, D; Doyle, J. G; Erdelyi, R (IOP Publishing, 2009-10-20)
    Here, we explore the nature of small-scale jet-like structures and their possible relation to explosive events and other known transient features, like spicules and macrospicules, using high-resolution spectroscopy obtained ...
  • Kodaikanal digitized white-light data archive (1921-2011): Analysis of various solar cycle features 
    Mandal, Sudip; Hegde, M; Samanta, T; Hazra, G; Banerjee, D; Ravindra, B (EDP Sciences, 2017-05)
    Context. Long-term sunspot observations are key to understanding and predicting the solar activities and its effects on space weather. Consistent observations, which are crucial for long-term variations studies, are generally ...
  • Latitude Distribution of Sunspots: Analysis Using Sunspot Data and a Dynamo Model 
    Mandal, Sudip; Karak, B. B; Banerjee, D (2017-12)
    In this paper, we explore the evolution of sunspot latitude distribution and explore its relations with the cycle strength. With the progress of the solar cycle, the distributions in two hemispheres from mid-latitudes ...
  • Long-term Evolution of Magnetic Field Proxies as Deduced from Archival Data 
    Banerjee, D; Bibhuti Kumar Jha; Mandal, Sudip; Chatterjee, Subhamoy; Hegde, M; KoSO Digitization Team (Cambridge University Press on behalf of International Astronomical Union, 2023)
    Regular observations of the solar magnetic field are available only for about the last five cycles. Thus, to understand the origin of the variation of the solar magnetic field, it is essential to reconstruct the magnetic ...
  • Long-term Evolution of the Sun's Magnetic Field during Cycles 15-19 Based on Their Proxies from Kodaikanal Solar Observatory 
    Mordvinov, A. V; Binay Karak, B; Banerjee, D; Chatterjee, S; Golubeva, E. M; Khlystova, A. I (IOP Publishing, 2020-10-10)
    The regular observation of the solar magnetic field is available only for about the last five cycles. Thus, to understand the origin of the variation of the solar magnetic field, it is essential to reconstruct the magnetic ...
  • Long-term Study of the Solar Filaments from the Synoptic Maps as Derived from a H Spectroheliograms of the Kodaikanal Observatory 
    Chatterjee, Subhamoy; Hegde, M; Banerjee, D; Ravindra, B (IOP Publishing, 2017-11)
    The century long ( 1914 – 2007 ) a H ( 656.28 nm ) spectroheliograms from the Kodaikanal Solar Observatory ( KSO ) have been recently digitized. Using these newly calibrated, processed images we study the ...
  • Magnetoacoustic wave propagation in off-limb polar regions 
    O'Shea, E; Banerjee, D; Doyle, J. G (EDP Sciences, 2006-02)
    Aims.To find evidence of magnetoacoustic waves in off-limb polar regions. Methods.Using temporal series data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations found in radiant flux and velocity ...
  • Magnetohydrodynamic Phenomena in Solar Atmosphere 
    Banerjee, D (Indian Institute of Astrophysics, Bangalore, 1996-12)
  • Magnetohydrodynamic waves in open coronal structures 
    Banerjee, D; Krishna Prasad, S; Pant, V; McLaughlin, J. A; Antolin, P; Magyar, N; Ofman, L; Tian, H; Van Doorsselaere, T; De Moorte, I; Wang, T. J (Springer Nature B.V, 2021-10)
    Modern observatories have revealed the ubiquitous presence of magnetohydrodynamic waves in the solar corona. The propagating waves (in contrast to the standing waves) are usually originated in the lower solar atmosphere ...
  • Measurements of solar differential rotation using the century long kodaikanal sunspot data 
    Jha, Bibhuti K; Priyadarshi, Aditya; Mandal, Sudip; Chatterjee, Subhamoy; Banerjee, D (Springer, 2021-01)
    The rotational profile of the Sun is considered to be one of the key inputs in a solar dynamo model. Hence, precise and long-term measurements of this quantity is important for our understanding of solar magnetism and its ...
  • MHD Seismology of a loop-like filament tube by observed kink waves 
    Pant, V; Srivastava, A. K; Banerjee, D; Goossens, M; Chen, P.-F; Joshi, N. C; Zhou, Y.-H (IOP Publishing, 2015-10)
    We report and analyze observational evidence of global kink oscillations in a solar filament as observed in Hα by instruments administered by National Solar Observatory (NSO)/Global Oscillation Network Group (GONG). An ...
  • MHD Waves in Coronal Holes 
    Banerjee, D; Krishna Prasad, S (John Wiley & Sons, Inc., 2015-05)
    Coronal holes are the dark patches in the solar corona associated with relatively cool, less dense plasma and unipolar fields. The fast component of the solar wind emanates from these regions. Several observations ...
  • Migration of solar polar crown filaments in the past 100 years 
    Xu, Yan; Banerjee, D; Chatterjee, Subhamoy; Potzi, Werner; Wang, Ziran; Ruan, Xindi; Jing, Ju; Wang, Haimin (IOP Publishing, 2021-03-01)
    Polar crown filaments (PCFs) are formed above the polarity inversion line, which separates unipolar polar fields and the nearest dispersed fields. They are important features in studying solar polar fields and their cyclical ...
  • Multi-wavelength study of a high velocity event near a sunspot 
    Lin, C. -H; Banerjee, D; O`Shea, E; Doyle, J. G (2006-05)
    Context: .Jets with velocities higher than 200 km s-1 are often observed in the X-ray spectral range in the solar atmosphere, however, very few such objects are observed in the EUV range. Aims: .We report on an eruptive ...

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