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  • GMRT Observations of the 2006 outburst of the Nova RS Ophiuchi: First detection of emission at radio frequencies < 1.4 GHz 
    Kantharia, N. G; Anupama, G. C; Prabhu, T. P; Ramya, S; Bode, M. F; Eyres, S. P. S; O'Brien, T. J (University of Chicago Press, 2007-10)
    The first low radio frequency (<1.4 GHz) detection of the outburst of the recurrent nova RS Ophiuchi is presented in this Letter. Radio emission was detected at 0.61 GHz on day 20 with a flux density of 48 mJy and at 0.325 ...
  • GMRT study of extremely faint dwarf irregular galaxies 
    Begum, A; Chengalur, J. N (Astronomical Society of India, 2004-09)
    We present results of deep, high velocity resolution (~1.6 km s-1) Giant Metrewave Radio Telescope (GMRT) HI 21 cm-line observations of a sample of extremely faint (MB > -12.5) dwarf irregular galaxies. unlike previous ...
  • A GMRT study of Seyfert galaxies NGC 4235 and NGC 4594: evidence of episodic activity? 
    Kharb, P; Srivastava, S; Singh, V; Gallimore, J. F; Ishwara-Chandra, C. H; Ananda, H (Oxford University Press on behalf of the Royal Astronomical Society, 2016-06)
    Low-frequency observations at 325 and 610 MHz have been carried out for two ‘radio-loud’ Seyfert galaxies, NGC 4235 and NGC 4594 (Sombrero galaxy), using the Giant Meterwave Radio Telescope (GMRT). The 610 MHz total ...
  • GOLF: A New Proxy for Solar Magnetism 
    Mathur, S; Jimenez-Reyes, S. J; Garcia, R. A (GOLF: A New Proxy for Solar Magnetism, 2009)
    Solar magnetism is measured with different indices: for instance the Magnetic Plage Solar Index (MPSI) and the Mount Wilson Sunspot Index (MWSI), number of sunspots, radio flux at 10.7 cm, Ca II K, Mg II K, EUV, He I or ...
  • GONG instrument and science 
    Harvey, J; The GONG Team (Astronomical Society of India, 1998-09)
    The Global Oscillation Network Group (GONG) is an international project to study the solar interior using helioseismology. The major goal is to accurately measure those modes of solar acoustic oscillations that have global ...
  • 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, ...
  • GONG site evaluation program at Udaipur Solar Observatory 
    Ambastha, A; Bhatnagar, A; Jain, R; Srivastava, N; Gupta, S; Sharma, R; Agrawal, G (Astronomical Society of India, 1991)
    The Global Oscillations Network Group (GONG) project to study the internal structure and dynamic of the sun is discussed. The GONG project will measure waves that penetrate throughout the sun's core. Power spectra of the ...
  • GPS measurements from the Ladakh Himalaya, India: Preliminary tests of plate-like or continuous deformation in Tibet 
    Jade, S; Bhatt, B. C; Yang, Z; Bendick, R; Gaur, V. K; Molnar, P; Anand, M. B; Kumar, D (Geological Society of America, 2004-11)
    Observations of relative motion in a geodetic network in Ladakh, India, and across southern Tibet indicate slow shear on the Karakorum fault, rapid east-west extension across the whole of southern Tibet, and constant ...
  • GPS-derived deformation rates in northwestern Himalaya and Ladakh 
    Jade, S; Raghavendra Rao, H. J; Vijayan, M. S. M; Gaur, V. K; Bhatt, B. C; Kumar, K; Jaganathan, S; Ananda, M. B; Dileep Kumar, P (Springer, 2011-09)
    Deformation rates derived from GPS measurements made at two continuously operating stations at Leh (34.1°N, 77.6°E) and Hanle (32.7°N, 78.9°E), and eight campaign sites in the trans-Himalayan Ladakh spanning 11 years ...
  • 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 collapse of inhomogeneous dust: Naked singularities, black hole formation and Hawking evaporation 
    Unnikrishnan, C. S (Astronomical Society of India, 1993)
    There are several examples of existence of naked singularities in models of spherically symmetric gravitational collapse and they are considered to be counter-examples to the Cosmic Censorship (CCC). In fact, there were ...
  • 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 Interactions Between Galaxies 
    Alladin, S. M (Astronomical Society of India, 1975-03)
  • A gravitational lens probe of galaxy-scale dark matter? 
    Sunita Nair (Astronomical Society of India, 1993)
    We present a model for an observed gravitationally lensed system, MG2016+112. We assume that there are two galaxies acting as lenses (as suggested by the observations), each with a diffuse dark matter halo. It is shown ...
  • 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 wave astronomy: Recent advances 
    Dhurandhar, S. V (Astronomical Society of India, 2002-09)
    Several groundbased gravitational wave (GW) laser interferometric projects have completed construction and are currently involved in conducting engineering runs. The spacebased NASA-ESA mission, LISA is expected to be ...
  • Gravitational Wave Astronomy:Probing Physics and Unravelling Astrophysics 
    Iyer, B. R (Astronomical Society of India, 2002-09)
    Kilometer scale Laser Interferometer Gravitational Wave Detectors like LIGO (vntGO) are expected to go online in 2002 (2003). Space interferometers like LISA are scheduled for 2011. In this talk the possible science payoffs ...

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