IIAP Publications: Recent submissions

  • Large-scale flow patterns in the solar atmosphere 
    Sivaraman, K. R (International Astronomical Union, 1990)
    One of the results of a study on the migration of H-alpha filaments, namely, the existence of meridional flow on the sun, is presented and extended to show the participation of this meridional flow in the solar cycle ...
  • Frequency and time profiles of metric wave isolated Type I solar noise storm bursts at high spectral and temporal resolution 
    Sundaram, G. A. S; Subramanian, K. R (Royal Astronomical Society, 2005-05)
    Type I noise storms constitute a sizeable fraction of the active Solar radio emission component. Observations of isolated instances of such bursts, in the swept-frequency mode at metric wavelengths, have remained sparse, ...
  • Inverse Cascade in Hydrodynamic Turbulence and its Role in Solar Granulation 
    Krishan, V (International Astronomical Union, 1990)
    Self-organization i.e the formation of large ordered structures in a turbulent medium is a consequence of inverse cascade where energy preferentially transfers towards large spatial scales. It is envisaged that this may ...
  • Theoretical study on the excited states of HCN 
    Nayak, M. K; Chaudhuri, R. K; Krishnamachari, S. N. L. G (American Institute of Physics, 2005-05)
    In the flash-photolysis of oxazole, iso-oxazole, and thiozole a transient band system was observed in the region 2500–3050 Å. This band system was attributed to a meta-stable form of HCN, i.e., either HNC or triplet HCN. ...
  • Generation of potential energy curves for the X-1Sigma (+) g, B-1 Delta (+) (g), and B' (1) states of C-2 using the effective valence shell Hamiltonian method 
    Chaudhuri, R. K; Freed, K. F (American Institute of Physics, 2005-04)
    Calculations of the ground and excited state potential energy curves of C2 using the third-order effective valence Hamiltonian (H/Sup-3rd(v) ) method are benchmarked against full configuration interaction and other correlated ...
  • Flares associated with abnormal rotation rates: Longitudinal minimum separation of leading and following sunspots 
    Hiremath, K. M; Suryanarayana, G. S; Lovely, M. R (EDP Sciences, 2005-07)
    Using six years (1969-1974) of data of sunspot groups from the white light pictures of the Kodaikanal Observatory, we compute rotation rates of the leading and the following sunspots and the rate of change of longitudinal ...
  • Polarization Measurements of Post-Asymptotic Giant Branch Candidates and Related Stars 
    Parthasarathy, M; Jain, S. K; Sarkar, G (The American Astronomical Society, 2005-05)
    We have obtained UBVRI polarization measurements of 26 post-asymptotic giant branch (post-AGB) candidates and related stars. The extremely metal-poor post-AGB star HR 4049 has been observed several times. In most cases we ...
  • Optical and near-infrared spectroscopy of nova V1494 Aquilae 1999 no. 2 
    Kamath, U. S; Anupama, G. C; Ashok, N. M; Mayya, Y. D; Sahu, D. K (Monthly Notices of the Royal Astronomical Society, Vol. 361, No. 4, pp. 1165 - 1172, 2005-08)
    Optical and near-infrared spectroscopic observations of the fast nova V1494 Aquilae 1999 no. 2 covering various phases - early decline, transition and nebular - during the first 18 months of its post-outburst evolution are ...
  • An Interpretation of the Differences in the Solar Differential Rotation during Even and Odd Sunspot Cycles 
    Javaraiah, J; Bertello, L; Ulrich, R. K (The American Astronomical Society, 2005-06)
    Using the data on sunspot groups during the period 1879-2004, we have found that the solar equatorial rotation rate during the odd-numbered sunspot cycles is well correlated with the equatorial rotation rate of the preceding ...
  • Radio emission by particles due to pulsar spin 
    Thomas, R. M. C; Gangadhara, R. T (EDP Sciences, 2005-07)
    We present a relativistic model for the motion of charged particles in rotating magnetic field lines projected onto a plane perpendicular to the rotation axis. By making an approximation that the projected field lines are ...
  • Coronal oscillations in the vicinity of a sunspot as observed by GIS/CDS 
    Lin, C. H; Banerjee, D; Doyle, J. G; O'Shea, E; Foley, C. R (EDP Sciences, 2005-05)
    In this paper, we present results from a time series analysis of data from the Grazing Incidence Spectrometer (GIS), onboard SoHO. Our observations were concentrated at the boundary between the quiet Sun and an active ...
  • Adaptive optics and its applications 
    Mohan, D; Mishra, S. K; Saha, S. K (National Institute of Science Communication and Information Resources, 2005-06)
    The adaptive optics (AO) system combines technologies that enable corrections in real time for the deleterious effects of the atmosphere allowing terrestrial telescopes to achieve their near diffraction-limit. Such a system ...
  • Polarization of L Dwarfs by Dust Scattering 
    Sengupta, S; Kwok, S (The American Astronomical Society, 2005-06)
    The degree of polarization in L dwarfs of spectral types L0-L6 resulting from dust scattering in a rotation-induced oblate photosphere is calculated. Assuming that forsterite is the main condensate, we derive the atmospheric ...
  • Identification of the Source Region of a ``Halo'' Coronal Mass Ejection Using Meter-Wavelength Radio Data 
    Kathiravan, C; Ramesh, R (The American Astronomical Society, 2005-07)
    We present meter-wavelength observations of the solar corona close to the onset of the ``halo'' coronal mass ejection (CME) of 1998 January 21 and estimate the change in electron density with time through a reproduction ...
  • Relativistic and correlation effects in atoms 
    Das, B. P; Latha, K. V. P; Sahoo, B. K; Sur, C; Chaudhuri, R. K; Mukherjee, D (World Scientific Publishing, 2005-03)
    This review article deals with some case studies of relativistic and correlation effects in atomic systems. After a brief introduction to relativistic many-electron theory, a number of applications ranging from correlation ...
  • The WEBT campaign to observe AO 0235+16 in the 2003-2004 observing season. Results from radio-to-optical monitoring and XMM-Newton observations 
    Raiteri, C. M; Villata, M; Ibrahimov, M. A; Larionov, V. M; Kadler, M; Aller, H. D; Aller, M. F; Kovalev, Y. Y; Lanteri, L; Nilsson, K; Papadakis, I. E; Pursimo, T; Romero, G. E; Teräsranta, H; Tornikoski, M; Arkharov, A. A; Barnaby, D; Berdyugin, A; Böttcher, M; Byckling, K; Carini, M. T; Carosati, D; Cellone, S. A; Ciprini, S; Combi, J. A; Crapanzano, S; Crowe, R; di Paola, A; Dolci, M; Fuhrmann, L; Gu, M; Hagen-Thorn, V. A; Hakala, P; Impellizzeri, V; Jorstad, S; Kerp, J; Kimeridze, G. N; Kovalev, Yu. A; Kraus, A; Krichbaum, T. P; Kurtanidze, O. M; Lähteenmäki, A; Lindfors, E; Mingaliev, M. G; Nesci, R; Nikolashvili, M. G; Ohlert, J; Orio, M; Ostorero, L; Pasanen, M; Pati, A. K; Poteet, C; Ros, E; Ros, J. A; Shastri, P; Sigua, L. A; Sillanpää, A; Smith, N; Takalo, L. O; Tosti, G.; Vasileva, A; Wagner, S. J; Walters, R; Webb, J. R; Wills, W; Witzel, A; Xilouris, E (EDP Sciences, 2005-07)
    A multiwavelength campaign to observe the BL Lac object AO 0235+16 (z=0.94) was set up by the Whole Earth Blazar Telescope (WEBT) collaboration during the observing seasons 2003-2004 and 2004-2005, involving radio, near-IR ...
  • Evidence of a Counterrotating Core in the Large Magellanic Cloud 
    Subramaniam, A; Prabhu, T. P (The American Astronomical Society, 2005-05)
    Stellar radial velocity data in the central region of the Large Magellanic Cloud (LMC) are used to estimate its radial velocity curve along various position angles (P.A.'s), including the line of nodes (LON). The central ...
  • Relativistic effective valence shell Hamiltonian method: Excitation and ionization energies of heavy metal atoms 
    Chaudhuri, R. K; Freed, K. F (American Institute of Physics, 2005-05)
    The relativistic effective valence shell Hamiltonian H(v) method (through second order) is applied to the computation of the low lying excited and ion states of closed shell heavy metal atoms/ions. The resulting excitation ...
  • Broad band photometry of solar corona 1995 
    Aleem, P. S. M; Sundararaman, K (Astronomical Society of India, 1998)
  • On Zero-Point Fluctuations, the Cosmological Constant, and the Graviton Mass 
    Sivaram, C (The American Astronomical Society, 1999-08)
    Recently attempts have been made to link vacuum zero-point fields (ZPF), with a nonzero cosmological constant (Lambda), which is now treated as a cosmological free variable to be determined by observations. In another ...

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