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Browsing by Author "Banerjee, D"

Browsing by Author "Banerjee, D"

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  • Effect of Newtonian Cooling on Waves in a Magnetized Isothermal Atmosphere 
    Banerjee, D; Hasan, S. S; Christensen-Dalsgaard, J (Springer, 1997-05)
    We examine the influence of nonadiabatic effects on the modes of an isothermal stratified magnetic atmosphere. The present investigation is a continuation of earlier work by Hasan and Christensen-Dalsgaard (1992) and ...
  • The Effects of Transients on Photospheric and Chromospheric Power Distributions 
    Mandal, Sudip; Yuan, D; Fang, Xia; Banerjee, D; Pant, V; Van Doorsselaere, T (IOP Publishing, 2016-09-10)
    Slow MHD waves are important tools for understanding coronal structures and dynamics. In this paper, we report a number of observations from the X-Ray Telescope (XRT) on board HINODE and Solar Dynamic Observatory/Atmospheric ...
  • The effects of transients on photospheric and chromospheric power distributions 
    Samanta, T; Henriques, V. M. J; Banerjee, D; Krishna Prasad, S; Mathioudakis, M; Jess, D; Pant, V (IOP Publishing, 2016-09-01)
    We have observed a quiet-Sun region with the Swedish 1 m Solar Telescope equipped with the CRISP Imaging SpectroPolarimeter. High-resolution, high-cadence, Hα line scanning images were taken to observe different layers of ...
  • Energy transport to the solar corona by magnetic kink waves 
    Choudhuri, A. R; Dikpati, M; Banerjee, D (American Astronomical Society, 1993-08-20)
    We show that the magnetic kink waves generated by the motions of photospheric footpoints of the coronal flux tubes can supply adequate energy for heating the quiet corona, provided there are occasional rapid motions of ...
  • Evidence for wave harmonics in cool loops 
    O'Shea, E; Srivastava, A. K; Doyle, J. G; Banerjee, D (Astronomy and Astrophysics, Vol. 473, pp. L13 - L16, 2007-10)
    Aims.Using temporal series image data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations found in intensity (radiance) measurements from the transition region O V 629 line with the aim of finding ...
  • Evolution of the Sun's activity and the poleward transport of remnant magnetic flux in Cycles 21-24 
    Mordvinov, Alexander V; Karak, Bidya Binay; Banerjee, D; Golubeva, Elena M; Khlystova, Anna I; Zhukova, Anastasiya V.; Kumar, Pawan (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    Detailed study of the solar magnetic field is crucial to understand its generation, transport, and reversals. The timing of the reversals may have implications on space weather and thus identification of the temporal ...
  • Evolution of the thermodynamic properties of a coronal mass ejection in the inner Corona 
    Sheoran, Jyoti; Pant, V; Ritesh Patel; Banerjee, D (Frontiers, 2023-02)
    The thermodynamic evolution of Coronal Mass Ejections (CMEs) in the inner corona (≤1.5 Rsun) is not yet completely understood. In this work, we study the evolution of thermodynamic properties of a CME core observed in the ...
  • The extended solar cycle: muddying the waters of solar/stellar dynamo modeling or providing crucial observational constraints? 
    Srivastava, Abhishek K; McIntosh, Scott W; Arge, N; Banerjee, D; Dikpati, Mausumi; Dwivedi, Bhola N; Guhathakurta, Madhulika; Karak, B. B; Leamon, Robert J; Matthew, Shibu K; Munoz-Jaramillo, Andres; Nandy, D; Norton, Aimee; Upton, L; Chatterjee, S; Rakesh, M; Yamini K. Rao; Rahul Yadav (Frontiers, 2018-11-22)
    "In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle. Almost eighty years later, Hale described the nature of the ...
  • Extending the sunspot area series from Kodaikanal Solar Observatory 
    Jha, Bibhuti K; Hegde, M; Priyadarshi, Aditya; Mandal, Sudip; Ravindra, B; Banerjee, D (Frontiers, 2022-10)
    Kodaikanal Solar Observatory (KoSO) possesses one of world's longest and homogeneous records of sunspot observations that span more than a century (1904–2017). Interestingly, these observations (originally recorded in ...
  • The extent of 3-min oscillations in regions other than sunspot plumes 
    Lin, C. -H; Banerjee, D; Doyle, J. G; O`Shea, E (EDP Science, 2005-12)
    The active region, AR0554, was observed with NIS/CDS on board SoHO to examine the extent and range of oscillations from a range of features. Among all the NIS spectral lines analysed, significant oscillations were found ...
  • First Imaging Observation of Standing Slow Wave in Coronal Fan Loops 
    Pant, V; Tiwari, A; Yuan, D; Banerjee, D (IOP Publishing, 2017-09)
    We observe intensity oscillations along coronal fan loops associated with the active region AR 11428. The intensity oscillations were triggered by blast waves that were generated due to X-class flares in the distant ...
  • Flows and waves in braided solar coronal magnetic structures 
    Pant, V; Datta, A; Banerjee, D (IOP Publishing, 2015-03-01)
    We study the high frequency dynamics in the braided magnetic structure of an active region (AR 11520) moss as observed by the High-Resolution Coronal Imager (Hi-C). We detect quasi-periodic flows and waves in these structures. ...
  • Forward modeling of propagating slow waves in coronal loops and their frequency-dependent damping 
    Mandal, Sudip; Magyar, N; Yuan, D; Van Doorsselaere, T; Banerjee, D (IOP Publishing, 2016-03)
    Propagating slow waves in coronal loops exhibit a damping that depends upon the frequency of the waves. In this study we aim to investigate the relationship of the damping length ( L d ) with the frequency of the ...
  • Forward modeling of standing slow modes in flaring coronal loops 
    Yuan, D; Van Doorsselaere, T; Banerjee, D; Antolin, P (IOP Publishing, 2015-07-01)
    Standing slow-mode waves in hot flaring loops are exclusively observed in spectrometers and are used to diagnose the magnetic field strength and temperature of the loop structure. Owing to the lack of spatial information, ...
  • Frequency-Dependent Damping in Propagating Slow Magneto-Acoustic Waves 
    Krishna Prasad, S; Banerjee, D; Doorsselaere, T. V (IOP Publishing, 2014-07-10)
    Propagating slow magneto-acoustic waves are often observed in polar plumes and active region fan loops. The observed periodicities of these waves range from a few minutes to a few tens of minutes and their amplitudes were ...
  • High-Frequency Dynamics of Active Region Moss as Observed by IRIS 
    Narang, Nancy; Pant, V; Banerjee, D; Doorsselaere, Tom Van (Frontiers, 2019-05-16)
    The high temporal, spatial and spectral resolution of Interface Region Imaging Spectrograph (IRIS) has provided new insights into the understanding of different small-scale processes occurring at the chromospheric and ...
  • IIA Newsletter, Vol.10, No.4, December 2007 
    Banerjee, D; Mallik, D. C. V; Varghese, B. A (Indian Institute of Astrophysics, 2007-12)
  • IIA Newsletter, Vol.11, November 2006 
    Banerjee, D; Mallik, D. C. V; Varghese, B. A (Indian Institute of Astrophysics, 2006-11)
  • IIA Newsletter, Vol.12, No.1, March 2007 
    Banerjee, D; Mallik, D. C. V; Varghese, B. A (Indian Institute of Astrophysics, 2007-03)
  • IIA Newsletter, Vol.12, No.2, June 2007 
    Banerjee, D; Mallik, D. C. V; Varghese, B. A (Indian Institute of Astrophysics, 2007-06)

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