IIAP Publications: Recent submissions

  • HF doppler and ionosonde observations on the onset conditions of equatorial spread F 
    Jayachandran, B; Balan, N; Rao, P. B; Sastri, J. H; Bailey, G. J (American Geophysical Union, 1993)
    The relative importance of height, vertical drift velocity, and electron density gradient of the postsunset bottomside (5.5 MHz) equatorial F region for the onset of spread F is studied using simultaneous HF Doppler radar ...
  • Nuclear matter in the derivative scalar coupling model. Energy per nucleon and a finite temperature equation of state 
    Datta, B; Sahu, P. K (Elsevier Science B.V., 1993-12-02)
    We calculate an equation of state of nuclear matter based on the derivative scalar coupling model proposed by Zimanyi and Moszkowski, using improved values of the saturation density and binding energy. Comparison of this ...
  • Oort and the comets 
    Bhatt, H. C (Indian Academy of Sciences, 1993-07-25)
  • On limiting field strengths in gravitation 
    Desabbata, V; Sivaram, C (Springer, 1993-12)
    We consider through the equivalence principle the existence of maximal and minimal field strengths in gravitation. We explore the consequences for gravitational collapse and for explaining the rotation curve of galaxies ...
  • Jan oort and interstellar clouds 
    Mallik, D. C. V (Indian Academy of Sciences, 1993-07-25)
  • Penetration of polar electric fields to the nightside dip equator at times of geomagnetic sudden commencements 
    Sastri, J. H; Rao, J. V. S. V; Ramesh, K. B (American Geophysical Union, 1993-10-01)
    Measurements of Doppler Velocity, V D of F - region reflections at normal incidence over Kodaikanal (dip 3°N, 77° 28′E) are used to study the nature of perturbations in F - region vertical plasma drift, V z associated with ...
  • A low cost steerable radio-telescope 
    Sawant, H. S; Neri, J. A. C. F; Fernandes, F. C. R; Cecatto, J. R; Sankararaman, M. R; Faria, C; Stephany, S; Rosa, R. R; Andrade, M. C; Alonso, E. M. B; Ludke, E; Subramanian, K. R; Ramesh, R; Sundararajan, M. S; Ananthakrishnan, S; Swarup, G; Boas, J. W. V; Botti, L. C. L; Moron, C. E; Saito, J. H (Elsevier B. V., 2003)
    We present the technical characteristics of a low-cost radio telescope for solar/non solar observations at decimetric (1200–1700 MHz) and centimetric (2700 and 5000 MHz) wavelengths known as Brazilian Decimetric Array ...
  • Coupled Cluster Calculations of the Ground and Excited Electronic States Using Two- and Four-Component Relativistic Spinors 
    Chaudhuri, R. K (Molecular Diversity Preservation International, 2003-12)
    The coupled cluster based linear response theory which is applicable to the direct calculation of atomic and molecular properties are presented and applied to compute the ionization potentials and excitation energies of ...
  • High resolution studies of intermediate drift bursts 
    Fernandes, F. C. R; Krishan, V; Andrade, M. C; Cecatto, J. R; Freitas, D. C; Sawant, H. S (Elsevier B. V., 2003)
    We report high resolution observations of the Intermediate Drift (IMD) bursts in decimetric band (ν = 950 2650 MHz). With a time resolution of 20 - 50 ms and a frequency resolution of 4 - 10 MHz, we are able to estimate ...
  • High resolution time profile of decimetric type-III bursts 
    Cecatto, J. R; Sawant, H. S; Fernandes, F. C. R; Krishan, V; Neri, J. A. C. F; Moraes, J. C (Elsevier B. V., 2003)
    Type-III bursts are signatures of the electron beams accelerated during the solar flares, their observation and investigation provide information of the acceleration processes, the characteristics of the exciting agent and ...
  • Holographic recording in Fe:Ce:Ti doped LiNbO3 crystal 
    Banyal, R. K; Prasad, B. R (Elsevier, 2007-06)
    High diffraction efficiency measurements in a triply doped Fe:Ce:Ti LiNbO3 crystal are reported. The crystal shows an improved recording sensitivity, weak light-induced scattering and extremely slow readout erasure which ...
  • Effect of the M 9.3 Sumatra-Andaman islands earthquake of 26 December 2004 at several permanent and campaign GPS stations in the Indian continent 
    Jade, S; Vijayan, M. S. M; Gupta, S. S; Kumar, P. D; Gaur, V. K; Arumugam, S (Taylor and Francis Ltd, 2007-07)
    The effect of the 26 December 2004 Sumatra-Andaman earthquake on the Indian continent has been estimated from the analysis of GPS data from permanent and campaign GPS sites in the Indian continent. Co-Seismic displacements ...
  • New mountings of concave reflection holographic grating 
    Singh, M; Reddy, G. P (Elsevier, 1987-06)
  • Comparison of computed fluxes for Fe X and Fe XIV lines with observed values at 1980 eclipse 
    Raju, P. K; Singh, J (Kluwer Academic Publishers, 1987-09)
    Fluxes have been computed for Fex (6374 Å) and Fe xiv (5303 Å) lines as a function of solar radii and at various coronal tempratures. The electron density derived from the white light corona during the total solar eclipse ...
  • Large dust grains in the dark cloud B5 
    Bhatt, H. C (Royal Astronomical Society, 1986-09)
    Polarization measurements of stars in the region of the dark cloud B5 indicate that the average dust grain size in the cloud is much larger than the mean interstellar grain size. Within the cloud, the average grain size ...
  • Chromospheric CA II K-line variations in the sun as a star over a solar cycle 
    Sivaraman, K. R; Singh, J; Bagare, S. P; Gupta, S. S (American Astronomical Society, 1987-02)
    The disk-averaged Ca II K profiles obtained at the Kodaikanal solar tower telescope for the period 1969-1984 are used to study the chromospheric variations in the sun as a star. The 1A index shows increases of 18 and 28 ...
  • Uncertainty principle limits on the cosmological constant 
    Sivaram, C (Springer, 1986-08)
    The identification of the cosmological constant term with the energy density of the vacuum enables lower and upper limits to be placed on its value. The upper limit arises from the constraint that the total zero-point ...
  • Effects of spacetime curvature and rotation on arrival times of pulses from fast pulsars 
    Kapoor, R. C; Datta, B (American Astronomical Society, 1986-12)
    General relativistic effects due to spacetime curvature and rotation on the arrival times of pulsar signals are investigated using a rotationally perturbed spherical metric. It is found that for the millisecond pulsar PSR ...
  • IRAS observations of R Cor Bor stars 
    Kameswara Rao, N; Nandy, K (Royal Astronomical Society, 1986-09)
    The IRAS observations of R Cr B, SU Tau and V 348 Sgr indicate the existence of a cool dust component of temperature about 30 K in R Cr B and SU Tau and less than or equal to 100 K in V 348 Sgr, in addition to the hot dust. ...
  • HF Doppler observations of small scale plasma motions in the equatorial electrojet 
    Sastri, J. H; Ramesh, K. B; Rao, J. V. S. V; Rao, D. R. K (The Royal Swedish Academy of Sciences, 1986-12)
    Recordings of the variations in phase path, P of reflections, at vertical incidence, from blanketing sporadic-E layers over Kodaikanal (dip 3.5°N) revealed small amplitude, quasi-sinusoidal oscillations of 45-180 s periods ...

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