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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • An efficient decomposition technique to solve angle-dependent Hanle scattering problems 
    Supriya, H. D; Sampoorna, M; Nagendra, K. N; Ravindra, B; Anusha, L. S (Elsevier, 2013-04)
    Hanle scattering is an important diagnostic tool to study weak solar magnetic fields. Partial frequency redistribution (PRD) is necessary to interpret the linear polarization observed in strong resonance lines. Usually ...
  • Efficient minimization of servo lag error in adaptive optics using data stream mining 
    Vyas, A; Roopashree, M. B; Prasad, B. R (Springer, 2011)
    Prediction of the wavefronts helps in reducing the servo lag error in adaptive optics caused by finite time delays (~ 1-5 ms) before wavefront correction. Piecewise linear segmentation based prediction is not suitable in ...
  • An efficient modulation scheme for dual beam polarimetry 
    Nagaraju, K; Ramesh, K. B; Sankarasubramanian, K; Rangarajan, K. E (Astronomical Society of India, 2007-09)
    An eight stage balanced modulation scheme for dual beam polarimetry is presented in this paper. The four Stokes parameters are weighted equally in all the eight stages of modulation resulting in total polarimetric efficiency ...
  • Eigenfrequencies of radial pulsations of strange quark stars 
    Datta, B; Sahu, P. K; Anand, J. D; Goyal, A (World Scientific, 1994)
    We calculate the range of Eigenfrequencies of radial pulsations of stable strange quark stars, using the general relativity pulsation equation and adopting realistic equation of state for degenerate (u,d,s) quark matter.
  • Eigenfrequencies of radial pulsations of strange quark starsEigenfrequencies of radial pulsations of strange quark stars 
    Datta, B; Sahu, P. K; Anand, J. D; Goyal, A (Elsevier, 1992-06)
    We calculate the range of eigenfrequencies of radial pulsations of stable strange quark stars, using the general relativistic pulsation equation and adopting realistic equation of state for degenerate strange quark matter.
  • The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III 
    Aihara, H; Allende Prieto, C; An, D; Anderson, S. F; Aubourg, E; Balbinot, E; Beers, T. C; Berlind, A. A; Bickerton, S. J; Bizyaev, D; Blanton, M. R; Gillespie, B. A; Pan, K; Gilmore, G; González Hernández, J. I; Bochanski, J. J; Gott, J. R; Gould, A; Grebel, E. K; Mullally, F; Gunn, J. E; Phleps, S; Hamilton, J; Harding, P; Carr, M. A; Harris, D. W; Hawley, S. L; Hearty, F. R; Nichol, R. C; Ho, S; Hogg, D. W; Holtzman, J. A; Davenport, J. R. A; Honscheid, K; Muna, D; Inada, N; Pandey, P; Ivans, I. I; Jiang, L; Johnson, J. A; Jordan, C; O'Connell, R. W; Jordan, W. P; Pichon, C; Kazin, E. A; Kirkby, D; Klaene, M. A; Knapp, G. R; Paris, I; Munn, J. A; Kneib, J; Kochanek, C. S; Koesterke, L; Kollmeier, J. A; Pieri, M. M; Ogando, R. L. C; Kron, R. G; Lampeitl, H; Lang, D; Le Goff, J; Bolton, A. S; Lee, Y. S; Lin, Y; Murayama, H; Long, D. C; Chen, Y; Loomis, C. P; Lucatello, S; Olmstead, M. D; Lundgren, B; Lupton, R. H; Ma, Z; Percival, W. J; MacDonald, N; Mahadevan, S; Maia, M. A. G; Prada, F; Makler, M; Myers, A. D; Malanushenko, E; Malanushenko, V; Oravetz, D. J; Mandelbaum, R; Maraston, C; Petitjean, P; Margala, D; Masters, K. L; Price-Whelan, A. M; McBride, C. K; McGehee, P. M; McGreer, I. D; Ménard; Naugle, T; Fausti Neto, A; Padmanabhan, N; Palanque-Delabrouille, N; Pfaffenberger, R; Pforr, J; Raddick, M. J; Bovy, J; Ramos, B. H. F; Esposito, M; Reyle, C; Rich, J; Miralda-Escudé, J; Richards, G. T; Rix, H; Robin, A. C; Chiappini, C; Rocha-Pinto, H. J; Rockosi, C. M; Roe, N. A; Cuong Nguyen, D; Rollinde, E; Brandt, W. N; Ross, A. J; Dawson, K; Ross, N. P; Rossetto, B. M; Sánchez, A. G; Sayres, C; Comparat, J; Schlegel, D. J; Evans, M. L; Schlesinger, K. J; Schmidt, S. J; Schneider, D. P; Sheldon, E; Dhital, S; Brinkmann, J; Shu, Y; Simmerer, J; Simmons, A. E; Sivarani, T; Fan, X; Connolly, N; Snedden, S. A; Sobeck, J. S; Steinmetz, M; Strauss, M. A; Ealet, A; Szalay, A. S; Tanaka, M; Brown, P. J; Thakar, A. R; Morrison, H. L; Thomas, D; Tinker, J. L; Cortes, M; Tofflemire, B. M; Tojeiro, R; Tremonti, C. A; Ebelke, G. L; Vandenberg, J; Vargas Magaña, M; Verde, L; Femenía Castellá, B; Vogt, N. P; Brownstein, J. R; Wake, D. A; Wang, J; Croft, R. A. C; Weaver, B. A; Weinberg, D. H; Edmondson, E. M; White, M; White, S. D. M; Font-Ribera, A; Yanny, B; Yasuda, N; Yeche, C; Zehavi, I; Busca, N. G; Campbell, H; Cuesta, A. J; da Costa, L. N; Eisenstein, D. J; Escoffier, S; Frinchaboy, P. M; Ge, J (IOP Publishing, 2011-04)
    The Sloan Digital Sky Survey (SDSS) started a new phase in 2008 August, with new instrumentation and new surveys focused on Galactic structure and chemical evolution, measurements of the baryon oscillation feature in the ...
  • Ejecta curtain radiative transfer modeling for probing its geometry and dust optical properties 
    Shalima, P; Wada, K; Kimura, H (Elsevier, 2015-10)
    An ejecta curtain is produced as a result of impact cratering of celestial bodies that excavates and ejects their surface and underground material. Since ejecta particles are thought to reflect the interior materials and ...
  • Ejection of massive black holes from galaxies 
    Kapoor, R. C (Indian Academy of Sciences, 1976-11)
    Gravitational recoil of a gigantic black hole of about 10 to the 8th to 10 to the 9th solar masses formed in the nonspherical collapse of the nuclear part of a typical galaxy can take place with an appreciable speed as a ...
  • Electric dipole and quadrupole transition amplitudes for Ba+ using the relativistic coupled-cluster method 
    Gopakumar, G; Merlitz, H; Chaudhuri, R. K; Das, B. P; Mahapatra, U. S; Mukherjee, D (The American Physical Society, 2002-09)
    We present our calculations of the electric dipole and quadrupole matrix elements for transitions between low-lying bound states of Ba1 that are relevant for parity nonconservation studies using the relativistic coupled-cluster ...
  • Electric dipole transition amplitudes for 207 Pb+ 
    Sahoo, B. K; Majumder, S; Merlitz, H; Chaudhuri, R. K; Das, B. P; Mukherjee, D (Institute of Physics, 2006-01)
    Electric dipole transition amplitudes of certain low-lying states of Pb+ have been calculated using the relativistic coupled-cluster theory and compared with previous calculations. The role of electron correlation is found ...
  • Electric quadrupole moment of the 5d/sup2/ D/sub3∕2/ state in /sup171/Yb/sup+/: A relativistic coupled-cluster analysis 
    Latha, K. V. P; Sur, C; Chaudhuri, R. K; Das, B. P; Mukherjee, D (The American Physical Society, 2007-12)
    The electric quadrupole moment for the 5d 2D3/2 state of 171Yb+, has been calculated using the relativistic coupled-cluster method. Earlier a similar calculation was performed for the 4d 2D5/2 state of 88Sr+ which is the ...
  • Electric Quadrupole Moments of the D States of Alkaline-Earth-Metal Ions 
    Sur, C; Latha, K. V. P; Sahoo, B. K; Chaudhuri, R. K; Das, B. P; Mukherjee, D (The American Physical Society, 2006-05)
    The electric quadrupole moment for the 4dD5/22 state of Sr+88; one of the most important candidates for an optical clock, has been calculated using the relativistic coupled-cluster theory. This is the first application of ...
  • Electromagnetic properties of neutral and charged spin-1 particles 
    Nieves, J. F; Pal, P. B (The American Physical Society, 1997-03)
    The structure of the electromagnetic vertex of spin-1 particles is studied in a general way, for the diagonal as well as the off-diagonal couplings. In each case, we consider in detail the consequences of gauge invariance ...
  • Electromagnetic radiation in a helical magnetic field 
    Krishan, V (1984)
    Electromagnetic radiation spectrum is studied in a helical magnetic field since such magnetic field configurations may be present in cosmic objects. It is shown that, by a proper choice of the spatial period of the magnetic ...
  • Electron acceleration in a post-flare decimetric continuum source 
    Subramanian, P; White, S. M; Karlický, M; Sych, R; Sawant, H. S; Ananthakrishnan, S (EDP Sciences, 2007-06)
    Aims.To calculate the power budget for electron acceleration and the efficiency of the plasma emission mechanism in a post-flare decimetric continuum source. Methods.We have imaged a high brightness temperature ($\sim ...
  • Electron Cooling in a Young Radio Supernova: SN 2012aw 
    Yadav, N; Ray, A; Chakraborti, S; Stockdale, C; Chandra, P; Smith, R; Roy, R; Bose, S; Dwarkadas, V; Sutaria, F. K; Pooley, D (IOP Publishing, 2014-02-10)
    We present the radio observations and modeling of an optically bright Type II-P supernova (SN), SN 2012aw which exploded in the nearby galaxy Messier 95 (M95) at a distance of 10 Mpc. The spectral index values calculated ...
  • Electron correlation effects in hyperfine interactions in 45/SupSc and 89/SupY 
    Sahoo, B. K; Beier, T; Das, B. P; Chaudhuri, R. K; Mukherjee, D (Institute of Physics, 2005-12)
    Relativistic coupled-cluster theory has been employed to calculate the magnetic dipole and electric quadrupole hyperfine structure constants for the stable isotopes 45/supSc and 89/supY. The results are in good agreement ...
  • The electron electric dipole moment enhancement factors of Rubidium and Cesium atoms 
    Nataraj, H. S; Sahoo, B. K; Das, B. P; Chaudhuri, R. K; Mukherjee, D (2007-07-27)
    The enhancement factors of the electric dipole moment (EDM) of the ground states of two paramagnetic atoms; rubidium (Rb) and caesium (Cs) which are sensitive to the electron EDM are computed using the relativistic ...
  • Electron impact polarization of resonance lines from Li-like ions 
    Chandra, Suresh (Indian Institute of Astrophysics, Bangalore, 1988)
  • Electron Scattering Redistribution Effect on Atomic Line Polarization 
    Supriya, H. D; Nagendra, K. N; Ravindra, B; Sampoorna, M (Astronomical Society of the Pacific, 2014-10)
    The scattering of line photons on free electrons modifies the polarization of the atomic spectral lines. Hence it is important to treat scattering by electrons as a redistribution process and to study in detail its effect ...

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