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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Grain Alignment in the Circumstellar Shell of IRC+10° 216 
    Andersson, B. -G; Lopez-Rodriguez, Enrique; Medan, Ilija; Archana Soam; Hoang, Thiem; Vaillancourt, John E; Lazarian, Alex; Sandin, Christer; Mattsson, Lars; Tahani, Mehrnoosh (American Astronomical Society, 2022-06-01)
    Dust-induced polarization in the interstellar medium (ISM) is due to asymmetric grains aligned with an external reference direction, usually the magnetic field. For both the leading alignment theories, the alignment of the ...
  • Gravimagnetic field, torsion, and gravitational shielding 
    de Sabbata, V; Sivaram, C (Springer, 1991-08)
    Many arguments are given in support of the existence of a gravimagnetic field in nature. Its connection with torsion is elaborated. Some consequences of the existence of such a field for effects of gravitational shielding ...
  • Gravitating systems with torsion self-interaction 
    Sivaram, C; de Andrade, L. C. G (Kluwer Academic Publishers, 1993-02)
  • Gravitational instability of interstellar magnetic clouds 
    Ghosh, K. K; Bhattacharyya, J. C (D. Reidel Publishing Co.,, 1985-12)
    The gravitational instability of a nonrotating isothermal gaseous disk permeated by a uniform frozen-in magnetic field is investigated using a fourth-order perturbation technique. From the results it is found that the disk ...
  • Gravitational Lensing and Microlensing in Clusters: Clusters as Dark Matter Telescopes 
    Safonova, M (Societe Royale des Sciences de Liege, 2018-04)
    Gravitational lensing is brightening of background objects due to deflection of light by foreground sources. Rich clusters of galaxies are very effective lenses because they are centrally concentrated. Such natural Gravitational ...
  • Gravitational searchlight and its astrophysical applications 
    Chitre, S. M; Narlikar, J. V; Kapoor, R. C (Nature Publishing Group, 1974-12)
    Attention is given to an interesting effect associated with light emitted in the forward direction by a source circulating in an equatorial plane around a highly collapsed object or a black hole. The emitted light received ...
  • Gravitational Waves from Collapsing Stars 
    Sivaram, C (Indian Institute of Astrophysics, 1988)
  • Gravitational waves: some less discussed intriguing issues 
    Sivaram, C (World Scientific Publishing Co., 2015-10)
    Attempts to detect gravitational waves is actively in progress with sophisticated devices like LIGO setup across continents. Despite being predicted almost 100 years ago, there has so far been no direct detection of these ...
  • Gravity and CP violation 
    de Sabbata, V; Sivaram, C (Springer, 1994-10)
    The non-conservation of CP symmetry in the decay of neutralK mesons was discovered almost three decades ago. The origin of this unique phenomenon is still not well understood. There have been attempts to link it with energy ...
  • Gravity of accelerations on quantum scales and its consequences 
    Sivaram, C; Arun, K; Kiren, O. V; Sreenath, B. N (Hadronic Press Inc, 2015-12)
    Gravity stands apart from other fundamental interactions in that it is locally equivalent to an accelerated frame and can be transformed away. Again it is indistinguishable from the geometry of space-time (which is an arena ...
  • GRB 051028: an intrinsically faint gamma-ray burst at high redshift? 
    Castro-Tirado, A. J; Jelínek, M; Pandey, S. B; McBreen, S; de Jong, J; Sahu, D. K; Ferrero, P; Caballero, J. A; Gorosabel, J; Kann, D. A; Klose, S; de Ugarte Postigo, A; Anupama, G. C; Gry, C; Guziy, S; Srividya, S; Valdivielso, L; Vanniarajan, S; Henden, A. A (EDP Sciences, 2006-12)
    We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to determine the reason for its optical faintness when compared to other ...
  • The Great North American Eclipse 2024 
    Kapoor, R. C. (NIScPR-CSIR, 2024-05)
    THE excitement about the total solar eclipse of 8 April 2024 in North America is unprecedented. Years before it was to pass, astronomers, educationists, students, the administrations and the local communities, and ...
  • Green coronal emission and the global solar cycle 
    Sivaraman, K. R; Makarov, V. I (Astronomical Society of the Pacific, 1992)
  • Green coronal intensity enhancements and their relation to the underlying photospheric/chromospheric activity 
    Ramesh, K. B; Nagabhushana, B. S; Varghese, B. A (Kluwer Academic Publishers, 1999-08)
    Analysis of the photospheric and chromospheric activity at the sites of enhanced 5303 Å coronal intensity revealed some important aspects of their association. We have examined the daily maps of 5303 Å coronal line intensity ...
  • Green's matrix for Compton reflection of polarized radiation from cold matter 
    Poutanen, J; Nagendra, K. N; Svensson, R (Royal Astronomical Society, 1996-12)
    The Compton-reflected spectrum from cold matter for incident X-rays and gamma-rays with arbitrary angular, spectral and polarization properties can be determined by a simple folding of Green's matrix with the incident ...
  • Grid size optimization for atmospheric turbulence phase screen simulations 
    Roopashree, M. B; Vyas, A; Prasad, B. R (Optical Society of America, 2011-07)
    Atmospheric phase screens are used for numerical evaluation of large telescope systems. In this paper, we optimized the grid size of the simulated phase screens in terms of the error in the structure function assuming a ...
  • A ground based near infra-red detector system 
    Bhattacharya, J. C (Centre of Advanced Study in Astronomy,Osmania University, 1974)
    The problems connected with observations in the near infra-red from ground based locations are discussed. It is shown that optical telescopes located at high stations in India. can be used effectively for near infra-red ...
  • Ground-based optical astronomy in India 
    Parthasarathy, M (National Astronomical Observatory, 1996)
  • Ground-Level Humidity, Pressure and Temperature Measurements during the October 24, 1995 Total Solar Eclipse 
    Gonzalez, G (Indian Institute of Astrophysics, Bangalore, 1997)
    Measurements of the relative humidity, air pressure, and air temperature were obtained at Nim Ka Thana, India on October 24, 1995 during tht total eclipse of the Sun. Data were also obtained 24 hours previous to the eclipse. ...
  • Group velocity tomography of the Indo-Eurasian collision zone 
    Acton, C. E; Priestley, K; Gaur, V. K; Rai, S. S (American Geophysical Union, 2010-12)
    We present results of a Rayleigh and Love wave group velocity dispersion study of the Indo-Eurasian collision zone. Group velocity dispersion curves are measured and combined to produce dispersion maps for 10–70 s period ...

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