IIA Institutional Repository: Recent submissions

  • Instrumentation of "Solar X-Ray Spectrometer" Low Energy Detector (SLD) - Proposed payload onboard Indian satellite 
    Vadher, N. M; Shah, A. B; Rajmal, J; Vats, H. O; Deshpande, M. R; Seetha, S; Murthy; Sharma, R. K; Umapathy (Astronomical Society of India, 2000)
    It is proposed to fly a high spectral and temporal resolution - "Solar X-Ray Spectrometer (SOXS)" onboard Indian satellite. The SOXS will provide the disk integrated flux in the energy range 2 keV-10 MeV. It is composed ...
  • Science from "Solar X-ray Spectrometer (SOXS)" - Proposed payload onboard Indian satellite 
    Jain, R; Rao, A. R; Deshpande, M. R; Dwivedi, B. N; Manoharan, P. K; Seetha, S; Vahia, M. N; Vats, H. O; Venkatakrishnan, P (Astronomical Society of India, 2000)
    It is proposed to fly a high spectral and temporal resolution "Solar X-ray Spectrometer (SOXS)" onboard Indian satellite to understand the mechanisms of energy release and particle acceleration in solar flares. The SOXS ...
  • The variability of HD 76536 
    Shylaja, B. S (Kluwer Academic Publishers, 1990-02)
    The spectrophotometric and photometric observations of the WC star HD 76536 are reported. The flux and the magnitude variations appear to be periodic. The possibilities of a compact binary are discussed.
  • Spectrophotometry of Nova Vulpeculae 1984:1 
    Shylaja, B. S (European Space Agency, 1985)
    The Spectrophotometric observations of the nova Vulpeculae, 1984, # 1 obtained at the Kavalur observatory in September 1984 have been identified and compared with other novae. The nova appears to be in the early decline ...
  • Core polarization in coupled-cluster theory induced by a parity and time-reversal violating interaction 
    Latha, K. V. P; Angom, D; Chaudhuri, R. K; Das, B. P; Mukherjee, D (Institute of Physics, 2008-01)
    The effects of a parity and time-reversal violating potential, in particular the tensor–pseudotensor electron–nucleus interaction, are studied. We establish that selected terms representing the interplay of these effects ...
  • Temperature and emission-line structure at the edges of H II regions 
    Mallik, D. C. V (American Astronomical Society, 1975-04)
    Models of ionization fronts located at the edges of expanding H II regions are presented. These fronts are of the weak D-type and are preceded by shocks in the H I clouds. Since the energy input time is smaller than the ...
  • Helium abundance in the solar envelope 
    Basu, S (Astronomical Society of India, 2000)
  • Fossil magnetic fields of the sun and stars 
    Hiremath, K. M; Gokhale, M. H (Astronomical Society of India, 2000)
    Using helioseismologically inferred internal rotation given by Dziembowski et al., 1989, in the previous work, we (Hiremath and Gokhale 1995, Hiremath 1995) modelled the steady (fossil) part of the poloidal magnetic field ...
  • Helioseismic constraints on the proton-proton reaction cross-section 
    Antia, H. M; Chitre, S. M (Astronomical Society of India, 2000)
  • Effect of a magnetic field on solar oscillation frequencies 
    Antia, H. M; Chitre, S. M (Astronomical Society of India, 2000)
  • Solar influence on barometric pressure 
    Rangarajan, S (Indian Meteorological Department, 1954-07)
  • Effect of asymmetry in peak profile on f-mode frequencies 
    Antia, H. M; Basu, S (Astronomical Society of India, 2000)
  • 4-day periodic variation in the Sun's meridional flow 
    Javaraiah, J (Astronomical Society of India, 2000)
    In latitude interval 20 deg -30 deg, the dependencies (i) 'initial' meridional motion, vini(?), of sunspot groups with life spans ??= 2-12 days, on ? of the spot groups, and (ii) mean meridional motion, v(?), of sunspot ...
  • On the power and frequency of p-modes in sunspots 
    Kumar, B; Tripathy, S. C; Jain, R; Deshpande, M. R (Astronomical Society of India, 2000)
    A time series of GONG Dopplergrams has been used to measure the velocity fluctuations in the sunspot and quiet photosphere simultaneously. The power spectrum analysis shows that the power of the predominant p-mode is reduced ...
  • 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, ...
  • 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 ...
  • Magnetoacoustic gravity surface waves with flows 
    Satya Narayanan, A (Astronomical Society of India, 2000)
    The effect of uniform flows on the characteristics of magneto acoustic-gravity surface waves at a single interface when both the magnetic field and the propagation vector are parallel to each other is studied. The region ...
  • Convective overshooting in stellar interiors 
    Singh, H. P; Roxburgh, I. W; Chan, K. L (Astronomical Society of India, 2000)
    The region of turbulent convective motions in stellar envelopes provides for both energy transport and the redistribution of chemical elements by mixing processes. Penetration or overshooting of these convective motions ...
  • Rotation rate and flows in the solar interior 
    Antia, H. M (Astronomical Society of India, 2000)
    The rotation rate in the solar interior can be inferred from measured splittings of solar oscillation frequencies using various inversion techniques. While other large scale flows can be studied using local techniques, ...
  • Helioseismology and solar neutrinos 
    Chitre, S. M (Astronomical Society of India, 2000)

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