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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Anisotropy of the Indian continental lithospheric mantle 
    Heintz, M; Kumar, V. P; Gaur, V. K; Priestley, K; Rai, S. S; Prakasam, K. S (Wiley-Blackwell Publishing, 2009-12)
    Due to the paucity of seismological data available in the public domain, the structure of the Indian lithosphere is still little known. We investigate the lithospheric structure and potential mechanical coupling between ...
  • Annual wave in the world-wide F-region ionization 
    Bhargava, B. N (Manager of Publications Civil Lines Delhi, 1959)
    An analysis of squares of noon median F2 layer critical frequencies for a 3-year period has been made in order to derive the latitude variation of the annual effect in the electron densities and its relation to average F2 ...
  • The annular eclipse of the Sun 1894 April 6 
    Smith, C. M (Royal Astronomical Society, 1894-12)
  • Anomalous Behaviour of 22.3 kHz NWC Signal during Total Solar Eclipse of October 24, 1995 
    De, B. K; Sarkar, S. K (Indian Institute of Astrophysics, Bangalore, 1997)
    The effect of total solar eclipse of October 24, 1995 on long distance VLF radio wave propagation of 22.3 kHz from North West Cape, Australia to Calcutta is being reported here. After the commencement of the total eclipse ...
  • Anomalous dispersion in the sun 
    Royds, T (Indian Institute of Astrophysics, Bangalore, 1915-10-29)
  • Anomalous dust in the environment of Herbig Ae/Be stars 
    Gorti, U; Bhatt, H. C (European Southern Observatory, 1993-04)
    Photometric data in the UBVRI bands of Herbig Ae/Be stars have been analyzed to study the wavelength dependence of extinction to these objects. The color excess ratios E(U-B)/E(B-V), E(V-R)/E(B-V), E(V-I)/E(B-V) and ...
  • Anomalous gravity data during the 1997 total solar eclipse do not support the hypothesis of gravitational shielding 
    Unnikrishnan, C. S; Mohapatra, A. K; Gillies, G. T (The American Physical Society, 2001-03)
    We present arguments that rule out the recent suggestion by Wang et al. that their observations of anomalous gravity data during the 1997 total solar eclipse in China could be evidence for shielding of gravity of the Sun ...
  • Anomalous heating of quasar emission-line regions 
    Krishan, V (Royal Astronomical Society, 1987-06)
    It is shown that the non-thermal radio radiation from a quasar is intense enough to drive parametric instabilities in the fully ionized emission-line regions. These instabilities cause significant enhancement of the plasma ...
  • Anomalous nature of outbursts of black hole candidate 4U 1630-472 
    Chatterjee, Kaushik; Debnath, Dipak; Bhowmick, Riya; Nath, Sujoy Kumar; Chatterjee, Debjit (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    The Galactic black hole candidate (BHC) 4U 1630−472 has gone through several outbursts (13 to be particular) in the last two and a half decades starting from the RXTE era till date. Like the outbursts of other transient ...
  • Anomalous redshifts of QSOS 
    Narlikar, J. V; Das, P. K (International Astronomical Union, 1980)
  • Anomalous redshifts of quasi-stellar objects 
    Narlikar, J. V; Das, P. K (American Astronomical Society, 1980-09)
    This paper is based on the assumption that the observational evidence to date does point to the possibility that high-redshift quasars are physically associated with low-redshift galaxies. It is first argued that the excess ...
  • Anomalous surface wave dispersion and the enigma of “continental-like” structure for the Bay of Bengal 
    Mitra, S; Priestley, K; Acton, C; Gaur, V. K (Elsevier B.V., 2011-11)
    Brune and Singh (1986) showed that fundamental mode surface wave group velocities measured across the Bay of Bengal were inconsistent with velocity models of a normal oceanic crust overlain by sediments. They attributed ...
  • Anomalously high apparent abundances of singly ionized helium in the Galactic H II region W3A 
    Roelfsema, P. R; Goss, W. M; Mallik, D. C. V (University of Chicago Press, 1992-07)
    The distribution of single ionized helium Y(+) in the Galactic H II region W3A has been determined using high-resolution observations of radio recombination lines in the 76, 92, and 110 alpha lines. The angular resolutions ...
  • Antiproton production in cosmic rays: A comparison of photino and quark models 
    Sivaram, C; Krishnan, V; de Sabbata, V; Yellappa, Y (International Cosmic Ray, 1990)
    The rise of energy of a pp interaction is accompanied by increase in multiplicity with corresponding rise in fraction of secondary particles produced in propagation of cosmic rays through the interstellar medium. A comparison ...
  • Anyons and torsion 
    de Sabbata, V; Sivaram, C (Italian Physical Society, 1992-10)
    We consider, in analogy to electromagnetic anyons as charge magnetic-flux composite, the gravitational anyons as mass-spin (energy-spin) composite. We show that torsion interaction has many features in common with the ...
  • AOTF-based spectro-polarimeter for observing Earth as an exoplanet 
    Jaiswal, Bhavesh; Singh, Swapnil; Jain, Anand; Sankarasubramanian, K; Nandi, Anuj (SPIE-Society of Photo-Optical Instrumentation Engineers, 2022-10)
    Earth is the only known habitable planet and it serves as a testbed to benchmark the observations of temperate and more Earth-like exoplanets. It is required to observe the diskintegrated signatures of Earth for a large ...
  • Aperture synthesis : methods and applications to optical astronomy 
    Saha, S. K (Springer, 2011)
    Over the years long baseline optical interferometry has slowly gained in importance and today it is a powerful tool. This timely book sets out to highlight the basic principles of long baseline optical interferometry. The ...
  • Aperture Synthesis at Optical Wavelengths 
    Saha, S. K (Department of Applied Optics and photonics, University of Calcutta, 2011)
    Optical stellar interferometers have demonstrated milli-arcsecond resolution with few apertures spaced tens of meters apart. Results from the area of stellar angular diameters with implications for emergent fluxes, ...
  • Aperture synthesis in optical astronomy; the current status 
    Saha, S. K (Invertis, Inc, 2007)
    A milestone in observational astronomy was achieved when the interferometric fringes of Lyrae (Vega) in the visible band were obtained in July 1974, by A. Labeyrie from an interferometer, called Interferometre a deux ...
  • The apparent effect of planets on the distribution of prominences 
    Royds, T; Sitarama Ayyar, S (Indian Institute of Astrophysics, Bangalore, 1913-11-15)

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