IIAP Publications: Recent submissions

  • Normalized impedance function and the straightforward inversion scheme for magnetotelluric data 
    Niwas, S; Gupta, P. K; Gaur, V. K (Indian Academy of Sciences, 2005-10)
    This paper investigates the performance of normalized response function obtained by normalizing the Cagniard impedance function by a suitable factor and then rotating the phase by 45 ◦to make it purely real for homogeneous ...
  • ω production in pp collisions 
    Ramachandran, G; Vidya, M. S; Deepak, P. N; Balasubramanyam, J; Venkataraya (The American Physical Society, 2005-09)
    A model-independent irreducible tensor formalism that was developed earlier to analyze measurements of p→p→→ppπ° is extended to present a theoretical discussion of p→p→→ppω and of ω polarization in pp→ppω→ and in pp→→ppω→. ...
  • The Chemical Compositions of the SRd Variable Stars. I. XY Aquarii, RX Cephei, AB Leonis, and SV Ursae Majoris 
    Giridhar, S; Lambert, D. L; Gonzalez, G (The Astronomical Society of the Pacific, 1998-06)
    Chemical compositions are derived from high-resolution spectra for four stars classed as SRd variables in the General Catalogue of Variable Stars. Two stars—XY Aquarii and RX Cephei—are of solar metallicity and most likely ...
  • Post-midnight onset of spread-F at Kodaikanal during the June solstice of solar minimum 
    Sastri, J. H (European Geosciences Union, 1999-08)
    At dip equatorial stations in the Indian zone, spread-F conditions are known to develop preferentially around midnight during the June solstice (northern summer) months of low solar activity, in association with a distinct ...
  • Physical Interpretation of the Poynting-Robertson Effect 
    Srikanth, R (Academic press, 1999-07)
    Although the prevalent mathematical description of the Poynting-Robertson effect is correct, its physical interpretation is sometimes problematic. By means of a two-parameter model, we revisit the effect in order to get a ...
  • Chemical composition of evolved stars of high galactic latitude 
    Giridhar, S; Arellano Ferro, A (EDP Sciences, 2005-11)
    We have carried out abundance analysis for a sample of high galactic latitude supergiants in search of evolved stars. We find that HD 27381 has atmospheric parameters and an abundance pattern very similar to that of the ...
  • Development of a Speckle Interferometer and the Measurement of Fried's Parameter (ro) at the Telescope Site 
    Saha, S. K; Sudheendra, G; Chandra, A. U; Chinnappan, V (Kluwer Academic Publishers, 1999)
    A new optical speckle interferometer for use at the 2.34 meter Vainu Bappu Telescope (VBT), at Vainu Bappu Observatory (VBO), Kavalur, India, has been designed and developed. Provisions have been made for observation both ...
  • The truth behind the legend: European doctors in pre-colonial India 
    Kochhar, R (Indian Academy of Sciences, 1999-09)
    The aim of this article is to point out that the medical history of India in the seventeenth century needs to be studied for its bearing on the history of medical science in this country. During the period 1644–1717, ...
  • Deep Impact: Observations from a Worldwide Earth-Based Campaign 
    Meech, K. J; Ageorges, N; A'Hearn, M. F; Arpigny, C; Ates, A; Aycock, J; Bagnulo, S; Bailey, J; Barber, R; Barrera, L; Barrena, R; Farnham, T. L; Feldman, P; Fernández, Y. R; Filipovic, M. D; Lyke, J; Fisher, S; Fitzsimmons, A; Fong, D; Fugate, R; Jones, G. H; Serra-Ricart, M; Fujiwara, H; Fujiyoshi, T; Furusho, R; Fuse, T; Gibb, E; Groussin, O; Lynch, D; Gulkis, S; Gurwell, M; Hadamcik, E; Sharp, R; Magee, S. K; Hainaut, O; Harker, D; Harrington, D; Harwit, M; Hasegawa, S; Hergenrother, C. W; Hirst, P; Ma, J; Hodapp, K; Snell, R. L; Villanueva, G; Jones, P. A; Kadono, T; Kamath, U. W; Käufl, H. U; Kasuga, T; Kawakita, H; Kelley, M. S; Kerber, F; Kidger, M; Snodgrass, C; Kinoshita, D; von Braun, K; Maheswar, G; Knight, M; Lara, L; Larson, S. M; Lederer, S; Lee, C. F; Levasseur-Regourd, A. C; Li, J. Y; Blake, G; Li, Q. S; Licandro, J; Vora, P; Bauer, J. M; Manfroid, J; Marco, O; Martin, P; Melnick, G; Miller, S; Miyata, T; Stallard, T; Moriarty-Schieven, G. H; Moskovitz, N; Mueller, B. E. A; Wainscoat, R. J; Mumma, M. J; Belton, M. J. S; Muneer, S; Neufeld, D. A; Ootsubo, T; Osip, D; Stecklein, G; Pandea, S. K; Pantin, E; Paterno-Mahler, R; Patten, B; Walsh, K; Penprase, B. E; Peck, A; Bensch, F; Petitpas, G; Pinilla-Alonso, N; Sterken, C; Pittichova, J; Pompei, E; Prabhu, T. P; Qi, C; Rao, R; Watanabe, J; Rauer, H; Reitsema, H; Rodgers, S. D; Bhattacharya, B; Stüwe, J. A; Rodriguez, P; Ruane, R; Ruch, G; Rujopakarn, W; Sahu, D. K; Sako, S; Weaver, H. A; Sakon, I; Samarasinha, N; Sarkissian, J. M; Weiler, M; Saviane, I; Biver, N; Schirmer, M; Schultz, P; Schulz, R; Seitzer, P; Sekiguchi, T; Weaver, W; Selman, F; Honda, M; Sugita, S; Sumner, M; Suntzeff, N; Swaters, R; Takakuwa, S; Takato, N; Bockelée-Morvan, D; Thomas-Osip, J; Thompson, E; Tokunaga, A. T; Howell, E. S; Bonev, B. P; Tozzi, G. P; Tran, H; Troy, M; Trujillo, C; Van Cleve, J; Vasundhara, R; Vazquez, R; Boehnhardt, H; Vilas, F; Hutsemékers, D; Lin, Z. Y; Weissman, P. R; Welsh, W. F; Wilner, D; Wolk, S; Womack, M; Wooden, D; Woodney, L. M; Woodward, C; Wu, Z. Y; Iono, D; Wu, J. H; Lisse, C. M; Bonev, T; Yamashita, T; Yang, B; Yang, Y. B; Yokogawa, S; Zook, A. C; Zauderer, A; Zhao, X; Ip, W. H; Zhou, X; Zucconi, J. M; LoCurto, G; Buie, M. W; Burton, M. G; Butner, H. M; Cabanac, R; Campbell, R; Campins, H; Capria, M. T; Jackson, W; Carroll, T; Chaffee, F; Charnley, S. B; Lovell, A. J; Cleis, R; Coates, A; Cochran, A; Colom, P; Conrad, A; Coulson, I. M; Jehin, E; Crovisier, J; deBuizer, J; Dekany, R; de Léon, J; Lowry, S. C; Dello Russo, N; Delsanti, A; DiSanti, M; Drummond, J; Dundon, L; Jiang, Z. J; Etzel, P. B (Science, 2005-10)
    On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show ...
  • Dust Properties in the Far-Ultraviolet in Ophiuchus 
    Sujatha, N. V; Shalima, P; Murthy, J; Henry, R. C (The American Astronomical Society, 2005-11)
    We have derived the albedo (a) and phase function asymmetry factor (g) of interstellar dust grains at 1100 Å using archival Voyager observations of diffuse radiation in Ophiuchus. We have found that the grains are highly ...
  • Modeling of Jets from Comet Hale-Bopp (C/1995 O1): Observations from the Vainu Bappu Observatory 
    Vasundhara, R; Chakraborty, P (Academic Press, 1999-07)
    Jet and shell structures from Comet Hale-Bopp during the period October 1996 to October 1997 using data from the Vainu Bappu Observatory are modeled. Evolution of jet and shell structures during the period of observations ...
  • Comparative studies using coupled-cluster and unitary coupled-cluster methods: nuclear quadrupole moment, hyperfine constants and transition properties of 27Al 
    Sur, C; Chaudhuri, R. K; Das, B. P; Mukherjee, D (Institute of Physics, 2005-12)
    The magnetic dipole and electric quadrupole hyperfine constants of Aluminium (27/supAl) atom are computed using the relativistic coupled cluster (CC) and unitary coupled cluster (UCC) methods. Effects of electron correlations ...
  • 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 ...
  • SS 433: results of a recent multiwavelength campaign 
    Chakrabarti, S. K; Anandarao, B. G; Pal, S; Mondal, S; Nandi, A; Bhattacharyya, A; Mandal, S; Sagar, R; Pandey, J. C; Pati, A. K; Saha, S. K (Royal Astronomical Society, 2005-09)
    We conducted a multiwavelength campaign in 2002 September-October, to observe SS 433. We used the Giant Meter Radio Telescope for radio observations, the Physical Research Laboratory Infrared Telescope at Mt Abu for infrared ...
  • On the Fractal Structure of Solar Supergranulation 
    Paniveni, U; Krishan, V; Singh, J; Srikanth, R (Springer, 2005-10)
    We employ fractal analysis to study the complexity of supergranulation structure using the Solar and Heliospheric Observatory (SOHO) dopplergrams. Our data consists of 200 visually selected supergranular cells, for which ...
  • Relativistic coupled cluster method. Excitation and ionization energies of Sr and Yb atom 
    Nayak, M. K; Chaudhuri, R. K (Springer, 2006-02)
    Relativistic coupled cluster method (CCM) is applied to compute the low lying excited and ion states of strontium and ytterbium atom. The resulting excitation and ionization energies are in excellent agreement with ...
  • Scattering of light by a periodic structure in the presence of randomness IV. Limit of detection by curve fitting 
    Chatterjee, S; Vani, V. C (Indian Academy of Sciences, 2005-09)
    In the context of scattering of light, we determine the extent of randomness within which a hidden periodic part can still be detected. The detection is carried out using a technique called the extended matched filtering, ...
  • Dynamics of the Solar Magnetic Network: Two-dimensional MHD Simulations 
    Hasan, S. S; van Ballegooijen, A. A; Kalkofen, W; Steiner, O (The American Astronomical Society, 2005-10)
    The aim of this work is to identify the physical processes that occur in the network and contribute to its dynamics and heating. We model the network as consisting of individual flux tubes, each with a nonpotential field ...
  • Application of relativistic coupled-cluster theory to heavy atomic systems with strongly interacting configurations: Hyperfine interactions in 207Pb+ 
    Sahoo, B. K; Chaudhuri, R. K; Das, B. P; Merlitz, H; Mukherjee, D (The American Physical Society, 2005-09)
    We report the results of our calculations of the magnetic dipole hyperfine constants for the ground and low-lying excited states of Pb+ using the relativistic coupled-cluster theory. The spectacular role of correlation ...
  • Pixel size and pitch measurements of liquid crystal 
    Banyal, R. K; Prasad, B. R (Indian Academy of Sciences, 2005-08)
    We present a simple technique for the determination of pixel size and pitch of liquid crystal (LC) based spatial light modulator (SLM). The proposed method is based on optical diffraction from pixelated LC panel that has ...

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