IIA Institutional Repository

Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

Sort by: Order: Results:

  • Emission Spectrum of Hot R CrB star Mv Sgr 
    Kameswara Rao, N; Houziaux, L; Giridhar, S (Indian Academy Sciences, 1990-03)
    The new spectroscopic observation of MV Sgr obtained at ESO in 1987july shows enhanced emission lines of He I , λ 3889, [S II ] λ 4068 relative to the observations discussed by Jeffrey et al. (1988). The presence of [SII] ...
  • Emission-line CCD imaging of three southern symbiotic stars 
    Bhatt, H. C; Sagar, R (Indian Academy of Sciences, 1991-06)
    Symbiotic stars that are strong radio sources and have cool dust emitting in the IR are expected to have extended emission nebulae around them. In order to search for such emission nebulae, CCD imaging of three symbiotic ...
  • Emission-line spectra of XX Ophiuchi in 1996 and 1997 
    Goswami, A; Kameswara Rao, N; Lambert, D. L (The Observatory, 2001-04)
  • The emission-line spectrum of the hot R Coronae Borealis star MV SGR 
    Pandey, G; Kameswara Rao, N; Lambert, D. L (Royal Astronomical Society, 1996-10)
    Spectra of MV Sgr obtained at CTIO in 1992 May show many emission lines in the red. Most of the emission lines show two components with a minimum centred at the stellar velocity. Species represented include H, HeI, TiII ...
  • Empirical Determination of Threshold Partial Wave Amplitudes for pp → ppω 
    Ramachandran, G; Balasubramanyam, J; Vidya, M. S; Venkataraya (World Scientific Publishing Company, 2006-08)
    Using the model-independent irreducible tensor approach to ω production in pp collisions, we show theoretically that it is advantageous to measure experimentally the polarization of ω, in addition to the proposed experimental ...
  • Empirical Determination of Threshold Partial Wave Amplitudes in p p --> p p omega 
    Ramachandran, G; Balasubramanyam, J; Vidya, M. S; Venkataraya (World Scientific Publishing Co, 2006-08)
    Using the model independent irreducible tensor approach to omega production in pp collisions, we show theoretically that it is advantageous to measure experimentally the polarization of w, in addition to the proposed ...
  • An empirical relation to estimate host galaxy stellar light from AGN spectra 
    Jalan, Priyanka; Rakshit, Suvendu; Woo, Jong-Jak; Kotilainen, Jari; Stalin, C. S (Oxford University Press on behalf of Royal Astronomical Society, 2023-05)
    Measurement of black hole mass for low-z (z≤ 0.8) Active Galactic Nuclei (AGNs) is difficult due to the strong contribution from host galaxy stellar light necessitating detailed spectral decomposition to estimate the AGN ...
  • Energetics of solar coronal mass ejections 
    Subramanian, P; Vourlidas, Angelos (EDP Sciences, 2007-05)
    Aims.We investigate whether solar coronal mass ejections are driven mainly by coupling to the ambient solar wind or through the release of internal magnetic energy. Methods.We examine the energetics of 39 flux-rope like ...
  • Energy and angular momentum transfer in binary galaxies 
    Namboodiri, P. M. S; Kochhar, R. K (NASA, 1990-11)
    The authors numerically studied tidal effects of a massive perturber on a satellite galaxy. The model consists of a spherical satellite galaxy and a point mass perturber and the encounter is non-penetrating. A wide range ...
  • The Energy Dependence of the Photoelectric Attenuation Coefficient of Substances 
    Chatterjee, S; Vyas, A; Ravanfar Haghighi, R; Kumar, P (Global Center for Advanced Research in Biomedical Physics and Biomedical Engineering, 2011)
    Introduction: The photoelectric attenuation coefficient of substances is known to depend upon the energy E of the photon and the effective atomic number of substances (Zeff) as (Zeff x/Ey). No definitive values about ...
  • Energy distribution of solar flare events 
    Sen, Samrat; Mangalam, A; Ramesh, R (Cambridge University Press, 2018-02)
    The coronal field typically reorganizes itself to attain a force-free field configuration. We have evaluated the power law index of the energy distribution f(E) = f0E−α by using a model of relaxation incorporating ...
  • Energy enigmas in the early universe and related problems in Newtonian cosmology 
    Sivaram, C (Springer, 1988-01)
    Some paradoxical situations regarding the balance between the different forms of energy present and the velocities of expansion in the early stages of the big bang are discussed. Solutions are suggested in the framework ...
  • Energy exchange during collision of a pair of disc-sphere galaxies 
    Namboodiri, P. M. S; Kochhar, R. K (Kluwer Academic Publishers, 1989-02)
    We have considered the collision of a pair of disc-sphere galaxies under the impulsive approximation to study the variation of the energy change of the disc due to the passage of a spherical galaxy. Various collision ...
  • Energy transport in intense flux tubes on the sun. I - Equilibrium atmosphere 
    Hasan, S. S (The American Astronomical Society, 1988-09)
    Model calculations are performed to determine self-consistently the equilibrium atmosphere in an intense flux tube. The generalization of the Eddington approximation to three dimensions is used to develop a zeroth-order ...
  • Energy transport to the solar corona by magnetic kink waves 
    Choudhuri, A. R; Dikpati, M; Banerjee, D (American Astronomical Society, 1993-08-20)
    We show that the magnetic kink waves generated by the motions of photospheric footpoints of the coronal flux tubes can supply adequate energy for heating the quiet corona, provided there are occasional rapid motions of ...
  • The Engelbert experience: pathways from the past 
    Vishveshwara, C. V (Springer, 1999)
  • The Enhanced Coronal Green Line Intensity and the Magnetic Field Gradients 
    Ramesh, K. B; Nagabhushana, B. S; Varghese, B. A (Indian Academy of Sciences, 2000-12)
  • Enhanced He{I} Absorption at the Feet of Solar X-Ray Loops 
    Venkatakrishnan, P; Sakurai, T; Suematsu, Y; Ichimoto, K (Astronomical Society of Japan, 1996)
    A comparison of He{I} spectroheliograms and Yohkoh soft X-ray images of active regions indicates that He{I} absorption is enhanced at the feet of hot X-ray loops. It is suggested that the conduction of heat from the loops ...
  • Enhanced luminosity of young stellar objects in cometary globules 
    Maheswar, G; Bhatt, H. C (Springer, 2008-06)
    In this study we investigated the effects of external trigger on the characteristics of young stellar objects (YSOs) associated with cometary globules (CGs). We made optical spectroscopy of stars associated with star-forming ...
  • Enhanced role of electron correlation in the hyperfine interactions in D5/22 states in alkaline-earth-metal ions 
    Sahoo, B. K; Sur, C; Beier, T; Das, B. P; Chaudhuri, R. K; Mukherjee, D (The American Physical Society, 2007-04)
    The low-lying n(=3,4,5)d 2D5/2 states of alkaline-earth-metal ions are of vital importance in a number of different physical applications. The hyperfine structure constants of these states are characterized by unusually ...

Search DSpace


Browse

My Account