IIAP Publications: Recent submissions

  • Possible signatures for strange stars in stellar X-ray binaries 
    Datta, B; Thampan, A. V; Bombaci, I (European Southern Observatory, 2000-03)
    Kilohertz quasi-periodic brightness oscillations (kHz QPOs) observed in certain X-ray burst sources may represent Keplerian frequencies in the inner regions of the accretion disk in such systems. If this assumption is ...
  • New limits on the gravitational Majorana screening from the Zürich G experiment 
    Unnikrishnan, C. S; Gillies, G. T (The American Physical Society, 2000-05)
    We analyze the results from an experiment being conducted at the Physik-Institut, Universität Zürich to measure the gravitational constant, and obtain a tight constraint on the Majorana gravitational shielding factor. The ...
  • Optical Variability of Blazars 
    Ghosh, K. K; Ramsey, B. D; Sadun, A. C; Soundararajaperumal, S (The American Astronomical Society, 2000-03)
    In this paper we show the results of our monitoring the flux variability of 15 blazars, within the redshift range of 0.07-2.06, all with a visual magnitude range between 14 and 20 mag. Because blazars have displayed ...
  • Binary pulsar PSR B1913+16 constrains the electron-proton charge asymmetry 
    Sengupta, S (Elsevier, 2000-07)
    A binary stellar system loses its orbital rotational energy by the emission of gravity wave. If there exists a charge asymmetry between electron and proton then the system would also lose its orbital rotational energy due ...
  • Some Further Effects of Discrete Scale Transformations 
    Sivaram, C (Springer, 2000-05)
    Some further consequences of the notion of discrete scale transformations invoked earlier to suggest strong links between fundamental interactions and cosmology are developed.
  • Oscillations In Galaxies 
    Namboodiri, P. M. S (Springer, 2000-02)
    Oscillations in galaxies have been investigated by numerical simulations. The various models used have density distributions corresponding to that of polytrope of index n in the range 0 ≤ n ≤ 4 and their evolution has been ...
  • Abundance evolution of intermediate mass elements (C to Zn) in the Milky Way halo and disk 
    Goswami, A; Prantzos, N (European Southern Observatory, 2000-07)
    We present a comprehensive study of the evolution of the abundances of intermediate mass elements, from C to Zn, in the Milky Way halo and in the local disk. We use a consistent model to describe the evolution of those two ...
  • Distribution of Supergranular Sizes 
    Srikanth, R; Singh, J; Raju, K. P (The American Astronomical Society, 2000-05)
    A gradient-based method of tessellation was applied to SOHO Dopplergrams and to Ca II K filtergrams in order to study the cellular pattern of the solar surface, in specific the geometric relationship between the tessellation ...
  • Effects of nuclear structure on parity nonconservation in atomic cesium in relativistic mean field theory 
    Panda, P. K; Das, B. P (The American Physical Society, 2000-12)
    We use relativistic mean field theory, which includes scalar and vector mesons, to calculate the binding energy and charge radii in 125Cs-139Cs. We then evaluate the nuclear structure corrections to the weak charges for a ...
  • The Chemical Compositions of the SRD Variable Stars. III. KK Aquilae, AG Aurigae, Z Aurigae, W Leo Minoris, and WW Tauri 
    Giridhar, S; Lambert, D. L; Gonzalez, G (The Astronomical Society of the Pacific, 2000-12)
    Chemical compositions are derived from high-resolution spectra for five field SRd variables. These supergiants not previously analyzed are shown to be metal poor: KK Aql with [Fe/H]=-1.2, AG Aur with [Fe/H]=-1.8, Z Aur ...
  • Radiative Transfer Effects and the Dynamics of Small-Scale Magnetic Structures on the Sun 
    Rajaguru, S. P; Hasan, S. S (The American Astronomical Society, 2000-11)
    The dynamical consequences of radiative energy transport on the evolution of gas confined to small-scale magnetic structures on the Sun are studied. Convective collapse, which transforms weak-field structures into intense ...
  • Results from a revisit to the K2V bright points 
    Sivaraman, K. R; Gupta, S. S; Livingston, W. C; Damé, L; Kalkofen, W; Keller, C. U; Smartt, R; Hasan, S. S (European Southern Observatory, 2000-11)
    We have used pairs of temporally simultaneous CaII K-line spectroheliograms and magnetic area scans to search for spatial correlation between the CaII K2V bright points in the interior of the network and corresponding ...
  • Changing molecular gas properties in the bar and center of NGC 7479 
    Hüttemeister, S; Aalto, S; Das, M; Wall, W. F (European Southern Observatory, 2000-11)
    We present sensitive interferometric 12/supCO, 13/supCO and HCN observations of the barred spiral galaxy NGC 7479, one of the few barred galaxies known to have a continuous gas-filled bar. We focus on the investigation and ...
  • Ionization potentials of beryllium-like ions from the relativistic coupled-cluster-based linear response theory 
    Chaudhuri, R. K; Panda, P. K; Merlitz, H; Das, B. P; Mahapatra, U. S; Mukherjee, D (Institute of Physics, 2000-11)
    We first test our recently developed relativistic coupled-cluster-based linear response theory (RCCLRT) by computing the principal and the shake-up ionization potentials (IP) of highly stripped atoms. Comparison is made ...
  • Non-radial Oscillations in an Axisymmetric MHD Incompressible Fluid 
    Satya Narayanan, A (Indian Academy of Sciences, 2000-12)
    It is well known from Helioseismology that the Sun exhibits oscillations on a global scale, most of which are non_radial in nature. These oscillations help us to get a clear picture of the internal structure of the Sun as ...
  • High energy universe -- Satellite missions 
    Krishan, V (Indian Academy of Sciences, 2000-12)
    A variety of satellite missions to observe the high energy universe are currently operating and some more with more versatility and capability are on the anvil. In this paper, after giving a brief introduction to the ...
  • Workshop I – Black holes and compact objects: Classical aspects 
    Ramachandra, B. S; Vishveshwara, C. V (Indian Academy of Sciences, 2000-10)
    This is a summary of the papers presented in session W1 on the papers submitted to the workshop I on the classical aspects of black holes and compact objects were classified into three categories: (i) theoretical aspects; ...
  • Early Observations of the Afterglow of GRB 000301c 
    Bhargavi, S. G; Cowsik, R (The American Astronomical Society, 2000-12)
    We report multiband observations of the optical transient associated with GRB 000301c carried out 2000 March 2-4 using the 2.34 m Vainu Bappu Telescope at Kavalur, India. When combined with other reported data, the initial ...
  • Black holes in nonflat backgrounds: The Schwarzschild black hole in the Einstein universe 
    Nayak, R. K; MacCallum, M. A; Vishveshwara, C. V (The American Physical Society, 2001-01)
    As an example of a black hole in a non-flat background a composite static spacetime is constructed. It comprises a vacuum Schwarzschild spacetime for the interior of the black hole across whose horizon it is matched onto ...
  • Effect of radiative cooling on collapsing charged grains 
    Pandey, B. P; Krishan, V; Roy, M (Indian Academy of Sciences, 2001-01)
    The effect of the radiative cooling of electrons on the gravitational collapse of cold dust grains with fluctuating electric charge is investigated. We find that the radiative cooling as well as the charge fluctuations, ...

Search DSpace


Browse

My Account