IIA Institutional Repository

Browsing Publications of Astronomical Society of India by Author "Jain, K"

Browsing Publications of Astronomical Society of India by Author "Jain, K"

Sort by: Order: Results:

  • GONG p-mode frequency changes with solar activity 
    Bhatnagar, A; Jain, K; Tripathy, S. C (Astronomical Society of India, 2000)
    In this paper, we present a correlation study of nine solar activity indices with p-mode frequency shifts obtained from the GONG data. It is found that the two are closely correlated and a linear relationship exits. Further, ...
  • On the p-mode Asymmetry between Velocity and Intensity from the GONG+ Data 
    Tripathy, S. C; Jain, K; Hill, F; Toner, C. G (Astronomical Society of India, 2003)
    We have analyzed the local acoustic spectra of small regions over the solar surface at different locations from disk center to limb via the technique of ring diagrams. The analysis suggest that the frequency shifts between ...
  • Reconstruction of Total Solar Irradiance on Multiple Time Scales 
    Jain, K; Hasan, S. S (Astronomical Society of India, 2003)
    We have developed regression models of total solar irradiance on different time scales by parameterizing the combined influence of sunspots and faculae. These models are useful in identifying the key parameters responsible ...
  • A relation between frequency shift and the changes in activity indices 
    Jain, K; Tripathy, S. C; Kumar, B; Bhatnagar, A (Astronomical Society of India, 2000)
    We present a linear relation between the shift in p-mode frequencies and variation in two solar activity indices, namely the sunspot number and 10.7 cm radio flux. From this relation, an empirical model is constructed to ...
  • Solar rotation rate from minimum to maximum of activity cycle 
    Jain, K; Tripathy, S. C; Bhatnagar, A; Kumar, B (Astronomical Society of India, 2001)
    Using helioseismic data from SOI/MDI and GONG for the current solar cycle 23, from solar minimum to near maximum phase, we report here on the temporal variation of the rotation rate.
  • Temporal variations of solar p-mode frequencies on time scales of 27 days 
    Tripathy, S. C; Jain, K; Bhatnagar, A (Astronomical Society of India, 2002-09)
    We have studied variations in the frequencies of intermediate degree solar oscillation modes on a time cadence of 18 and 27 days. We report that the p-modes adjust to changes in the activity measures on time scales as ...

Search DSpace


Browse

My Account