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Browsing by Author "Gopalswamy, N"

Browsing by Author "Gopalswamy, N"

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  • The location of solar metric type ii radio bursts with respect to the associated coronal mass ejections 
    Ramesh, R; Anna Lakshmi, M; Kathiravan, C; Gopalswamy, N; Umapathy, S (IOP Publishing, 2012-06-20)
    Forty-one solar type II radio bursts located close to the solar limb (projected radial distance rlesssim 0.8Rbigdot) were observed at 109 MHz by the radioheliograph at the Gauribidanur observatory near Bangalore during the ...
  • New Evidence for a Coronal Mass Ejection-driven High Frequency Type II Burst near the Sun 
    Anshu Kumari; Ramesh, R; Kathiravan, C; Gopalswamy, N (IOP Publishing, 2017-07)
    We report observations of the high frequency type II radio burst (≈430–30 MHz) that occurred in the solar corona on 2015 November 4. The drift rate of the burst, estimated close to the start frequency of its fundamental ...
  • A new investigation of microbursts at meter-decameter wavelengths 
    Subramanian, K. R; Gopalswamy, N; Sastry, Ch. V (Kluwer Academic Publishers, 1993-02)
    The results of a new investigation of microbursts at meter-decameter wavelengths are reported. Several properties of microbursts reported earlier are confirmed, and some new properties, such as time profile characteristics, ...
  • Observations and interpretation of solar decametric absorption bursts 
    Gopalswamy, N; Thejappa, G; Sastry, Ch. V (Indian Academy of Sciences, 1983-09)
    The observations of intensity reductions or absorption bursts in the solar decametric radio-continuum are reported. The reductions are interpreted as the absorption of continuum radiation by a shock-generated ion sound ...
  • Observations on the Fine Structures in Solar Decametric Radio Emission 
    Gopalswamy, N; Thejappa, G; Sastry, Ch. V (Indian Institute of Astrophysics, Bangalore, 1984)
    The Solar decametric radio emission consists of a variety of fine structures. This reflects the complexity of the corona at this level. Two observations, viz. absorption bursts and short duration narrow band bursts are ...
  • Prominence Eruption Initiated by Helical Kink Instability of an Embedded Flux Rope 
    Vemareddy, P; Gopalswamy, N; Ravindra, B (IOP Publishing, 2017-11)
    We study the triggering mechanism of a limb-prominence eruption and the associated coronal mass ejection ( CME ) near AR 12342 using Solar Dynamics Observatory and Large Angle and Spectrometric Coronagraph / Solar ...
  • Radioheliograph observations of metric Type II bursts and the kinematics of coronal mass ejections 
    Ramesh, R; Kathiravan, C; Sreeja S. K; Gopalswamy, N (Institute of Physics, 2010-03-20)
    Assuming that metric type II radio bursts from the Sun are due to magnetohydrodynamic shocks driven by coronal mass ejections (CMEs), we estimate the average CME acceleration from its source region up to the position of ...
  • A theory of Jovian shadow bursts 
    Gopalswamy, N (D. Reidel Publishing Co., 1986-06)
    The shadow events in the dynamic spectra of Jovian decametric emission are explained as the result of interaction between electron bunches responsible for S and L emissions. The relevant dispersion relation is derived for ...
  • Type-I Solar Radio Bursts 
    Gopalswamy, N (Indian Institute of Astrophysics, Bangalore, 1986)
    A brief review of the recent work done on Type-I radio emission in the Indian Institute of Astrophysics is presented. The most plausible low frequency turbulence needed to generate the type-I bursts is shown to be ion-sound ...

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