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  • Asymmetric lepton production in a universe with non-zero baryon number 
    Sivaram, C (Springer, 1982-03)
    Due to processes occurring during different stages of stellar evolution, a universe with a net baryon number develops an excess of neutrinos and positrons over antineutrinos of the same order as the observed relative ...
  • Asymmetry in energy transfer in a collision of galaxies 
    Ahmed, Farooq; Alladin, S. M (Astronomical Society of India, 1981-03)
    The time dependence of binding and translational energies of a pair of galaxies during head-on collisions has been studied with impulsive approximation. The two galaxies are assumed to be identical with mass distribution ...
  • Asymmetry in the length scales of the solar supergranulation network 
    Raju, K. P (IOP Publishing, 2020-08-20)
    Supergranulation is the horizontal velocity pattern on the solar surface with a typical size of 30,000 km and a lifetime of 24 hr. The network structure seen in chromospheric lines, such as Ca ii K 3934 Å, is the manifestation ...
  • Asymmetry parameter and efficiency for radiation pressure and scattering of electromagnetic radiation by a very large dielectric sphere 
    Shah, G. A (Kluwer Academic Publisher, 1991)
    The asymmetry parameter of the scattering diagram and the efficiency for radiation pressure for scattering by a very large dielectric sphere conforming to geometrical optics and diffraction, have been investigated beyond ...
  • Asymptotic giant branch stars in the ISOGAL survey 
    Ojha, D. K; Omont, A; Simon, G; Blommaert, J (Astronomical Society of India, 2000)
    We present and analyse the data of a field at 1 = 0o, b = +1o from the ISOGAL survey of selected areas of the inner Galactic bulge at 15 and 7 ?m. In combination with IJKs data from the near-infrared southern sky survey ...
  • Asymptotic Values of Some Scattering Parameters from Mie Theory 
    Shah, G. A (Indian Institute of Astrophysics, Bangalore, 1991)
    The scattering parameters such as extinction efficiency, albedo, asymmetry parameter, etc, have been studied on the basis of the Mie theory of scattering of electromagnetic radiation by a sphere as well as the classical ...
  • At what energy does gravity unite with grand unified theories in the early universe? 
    Sivaram, C (Springer, 1987-12)
    Unification of gravity with GUTs is usually expected at the Planck energy E pl≈10/sup19 GeV. However, the vastly different values of the two couplings at E Pl ( α GUT« 1, α grav≈ 1) would make such unity (at E Pl) implausible ...
  • AT2020ohl: its nature and probable implications 
    Roy, Rupak; Mandal, Samir; Sahu, D. K; Anupama, G. C; Nandi, Sumana; Kumar, Brijesh (Oxford University Press on behalf of Royal Astronomical Society., 2024-03)
    ASASSN-20hx, a.k.a AT2020ohl, is an ambiguous nuclear transient, which was discovered in the nearby galaxy NGC6297 by the All-Sky Automated Survey for Supernovae. We have investigated the evolution of AT2020ohl using a ...
  • Atlas of H-Alpha Synoptic Charts for Solar Cycle 19 (1955 - 1964): Carrington Solar Rotations 1355 to 1486 
    Makarov, V. I; Sivaraman, K. R (Indian Institute of Astrophysics, Bangalore, 1986)
  • An atmosphere on Ganymede from its occultation of SAO 186800 on 7 June 1972 
    Carlson, R. W; Bhattacharyya, J. C; Smith, B. A; Johnson, T. V; Hidayat, B; Smith, S. A; Taylor, G. E; O'Leary, B; Brinkmann, R. T (The American Association for the Advancement of Science, 1973-09)
    On 7 June 1972 the third Jovian satellite Ganymede occulted the eighth-magnitude star SAO 186800. Successful photoelectric observations obtained at Lembang, Java (Indonesia), and Kavalur, India, show nonabrupt immersions ...
  • Atmospheres of components of the close binary stars 
    Srinivasa Rao, M (Astronomical Society of India, 2002-09)
    For theoretical modeling of binary systems, one has to consider realistic models which takes into account the radiative transfer, hydrodynamics, and the effect of irradiation from the secondary component on the atmosphere of ...
  • Atmospheres of Cool Stars 
    Singh, Prabhjot (Indian Institute of Astrophysics, Bangalore, 1995-12)
  • Atmospheres of the Components of Close Binary Stars 
    Srinivasa Rao, M (Indian Institute of Astrophysics, Bangalore, 2001-03)
  • Atmospheric abundances in post-AGB candidates of intermediate temperature 
    Arellano Ferro, A; Giridhar, S; Mathias, P (EDP Sciences, 2001-03)
    Detailed atmospheric abundances have been calculated for a sample of -G supergiant stars with IR fluxes and/or high galactic latitudes. HD 172481 and HD 158616 show clear indications of being post-AGB stars that have ...
  • Atmospheric Characteristics at Trombay relating to the October 1995 Solar Eclipse 
    Sapra, B. K; Sunny, Faby; Kulkarni, P. B; Mahadevan, T. N; Pandit, G. G (Indian Institute of Astrophysics, Bangalore, 1997)
    A study was undertaken to examine the effect of a short-term reduction in the solar intensity on the characteristics of the atmospheric environment. Meteorological parameters, solar radiation variations, major pollutant ...
  • Atmospheric dispersion corrector for a multi-object spectroscopic mode of HROS-TMT 
    Manjunath, B; Hasan, Amirul; Divakar, Devika; Surya, Arun; Sriram, S; Sivarani, T; Prakash, A; Parvathy, M; Yadav, Sudharsan (SPIE-The International Society for Optical Engineering, 2023-10)
    Highly multiplexed spectroscopic surveys have changed the astronomy landscape in recent years. However, these surveys are limited to low and medium spectral resolution. High spectral resolution spectroscopy is often photon ...
  • Atmospheric extinction and background light measurements at Jammora, Jammu 
    Kaul, S. R; Dhar, V. K; Kaul, M. K; Bhat, R. K; Sapru, M. L; Kaul, R. K; Bhat, C. L (Astronomical Society of India, 1994)
    Atmospheric extinction and background light measurements have been carried out at Jammora for the period 1991 October-November, with a view to evaluate its suitability as a site for our new ground-based gamma-ray observatory. ...
  • Atmospheric extinction at Devasthal, Naini Tal 
    Mohan, V; Uddin, W; Sagar, R; Gupta, S. K (Astronomical Society of India, 1999)
    The atmospheric extinction coefficients in Johnson U, B, V, R and I photometric passbands are determined for the first time at Devasthal, Naini Tal during 1998 and 1999. A solid state stellar photometer mounted on a 52-cm ...
  • Atmospheric Extinction at Kavalur Observatory during 1980-85 
    Shylaja, B. S; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1986)
    From a series of photoelectric scanner observations during 1980-85, the atmospheric extinction at Kavalur has been analysed. The variation of this appears to follow lamda/sup-4/ law. There is a general increase in the ...
  • Atmospheric extinction measure at Guwahati 
    Barthakur, N. K; Duorah, H. L (Astronomical Society of India, 1996)
    The extinction coefficients in UBV filters were determined using the 15cm reflector at Guwahati University Observatory, Jalukbari during January - March, 1994, January - March, 1995 with photometric observations. The ...

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