IIA Institutional Repository: Recent submissions

  • Report on the Kodaikanal and Madras Observatories for 1899-1900 
    Smith, C. M (Kodaikanal and Madras Observatories, 1900-05)
  • Discovery of Main-belt Comet P/2006 VW139 by Pan-STARRS1 
    Hsieh, H. H; Yang, Bin; Haghighipour, N; Kaluna, H. M; Fitzsimmons, A; Denneau, L; Novakovic, B; Jedicke, R; Wainscoat, R. J; Armstrong, J. D; Duddy, S. R; Lowry, S. C; Trujillo, C. A; Micheli, M; Keane, J. V; Urban, L; Riesen, T; Meech, K. J; Abe, S; Cheng, Yu-Chi; Chen, Wen-Ping; Granvik, M; Grav, T; Ip, Wing-Huen; Kinoshita, D; Kleyna, J; Lacerda, P; Lister, T; Milani, A; Tholen, D. J; Vereš, P; Lisse, C. M; Kelley, M. S; Fernández, Y. R; Bhatt, B. C; Sahu, D. K; Kaiser, N; Chambers, K. C; Hodapp, K. W; Magnier, E. A; Price, P. A; Tonry, J. L (IOP Publishing, 2012-03-20)
    The main-belt asteroid (300163) 2006 VW139 (later designated P/2006 VW139) was discovered to exhibit comet-like activity by the Pan-STARRS1 (PS1) survey telescope using automated point-spread-function analyses performed ...
  • Voyager Observations of the Diffuse Far-ultraviolet Radiation Field 
    Murthy, J; Conn Henry, R; Holberg, Jay B (IOP Publishing, 2012-03)
    The two Voyager spacecraft have completed their planetary exploration mission and are now probing the outer realms of the heliosphere. The Voyager ultraviolet spectrometers continued to operate well after the Voyager 2 ...
  • Decomposition of the Galactic Disk: Abundances and Kinematics 
    Reddy, B. E (Cambridge University Press, 2007-08)
    To this contribution we present a brief review of our recent abundance surveys (Reddy et al. 2003; Reddy et al. 2006) of the Milky Way galaxy. Survey focussed on controlled samples of stars selected based on their kinematic ...
  • Commission 45: Stellar Classification 
    Corbally, C; Giridhar, S; Bailer-Jones, C; Humphreys, R; Kirkpatrick, D; Lloyd Evans, T; Luri, X; Minniti, D; Pasinetti, L; Straižys, V; Weiss, W (Cambridge University Press, 2007)
    This report, like its predecessors, focuses on areas which have been especially active since the last General Assembly. Two major developments have been the unification of the T-dwarf standards and the new general catalogue ...
  • Off-Limb Coronal Loop Dynamics as Seen from CDS, EIT and TRACE 
    Banerjee, D; O'Shea, E; Doyle, J. G (European Space Agency, 2006-07)
  • Geodetic constraints on the Bhuj 2001 earthquake and surface deformation in the Kachchh Rift Basin 
    Wallace, K; Bilham, R; Blume, F; Gaur, V. K; Gahalaut, V (American Geophysical Union, 2006-05)
    GPS measurement of historic survey points in the region of the Mw 7.6 Bhuj earthquake of 26 January 2001 reveal a rupture area 25 km × 15 km, with the top of the rupture located at least 9 km beneath the surface. The ...
  • Straightforward inversion of MT data using a normalized impedance function 
    Sri Niwas; Gupta, P. K; Gaur, V. K (Society of Exploration Geophysicists, 2007)
    We present a new algorithm for 1D magnetotelluric (MT) data inversion. It inverts a normalized impedance response function derived from the classical Cagniard impedance function. The scheme transforms the nonlinear problem ...
  • Physical parameters of RR Lyrae stars in the globular cluster NGC 5466: The Oosterhoff dichotomy 
    Rojas Lopez, V; Arellano Ferro, A; Giridhar, S; Bramich, D. M (Instituto de Astronomía, 2006-06)
    The highlights of CCD photometry of RR Lyrae stars in NGC 5466 are presented. The image subtraction method (Bramich et al. 2005) was used. The Fourier light curve decomposition, lead to an average [Fe/H]=-1.88+/-0.3 and a ...
  • Density-Matrix Renormalization Group studies of mixture of two different ultracold bosonic atoms 
    Mishra, T; Pai, R. V; Das, B. P (IOP Publishing, 2007)
    We investigate the ground state phase diagram for a two species Bose mixture in a one dimensional optical lattice using the finite size density matrix renormalization group (FSDMRG) method. We present our result for different ...
  • On the Rate of Change of Period for Accelerated Motion and Their Implications in Astrophysics 
    Rajamohan, R; Satya Narayanan, A (Progress in Physics, 2007-04)
    We have derived in this paper, the relationship that needs to be satisfied when length measurements are expressed in two different units. Interesting relationships emerge when the smaller of the two units chosen is a ...
  • Exact nonlinear solution for the Hall Alfvén wave in partially ionized plasmas 
    Krishan, V; Furukawa, M; Mahajan, S. M (Cambridge University Press, 2006-12)
    It is shown that the exact nonlinear solution for the Hall–Alfvén waves can be obtained in a uniformly rotating weakly ionized plasma such as those which exist in various types of accretion disks. In addition this piece ...
  • WKB Analysis of Axisymmetric Magneto-Rotational Instability in a Thin Accretion Disk 
    Furukawa, M; Krishan, V; Hirota, M; Yoshida, Z (The Japan Society of Plasma Science and Nuclear Fusion Research, 2006)
    The temporal behavior of axisymmetric magneto-rotational instability in a thin accretion disk is analyzed via the Wentzel-Kramars-Brillouin (WKB) method. The height of the thin disk is used as a small parameter. It is found ...
  • Study of isolated 1 : 1 AI+3.He complex using many-body perturbation theory: A multi-reference approach 
    Chattopadhyay, S; Mahapatra, U. S; Chaudhuri, R. K (Indian Association for the Cultivation of Science, 2007-10)
    Development and applications of many-body methods capable of reliable computation of potential energy curves (PEC) containing avoided curve-crossing zone remains a challenging area of activity in electronic structure theory ...
  • A Compilation of Interstellar Column Densities 
    Gudennavar, S. B; Bubbly, S. G; Preethi, K; Murthy, J (IOP Publishing, 2012-03)
    We have collated absorption line data toward 3008 stars in order to create a unified database of interstellar column densities. These data have been taken from a number of different published sources and include many ...
  • The Galactic R Coronae Borealis Stars: The C2 Swan Bands, the Carbon Problem, and the 12C/13C Ratio 
    Hema, B. P; Pandey, G; Lambert, D. L (IOP Publishing, 2012-03-10)
    Observed spectra of R Coronae Borealis (RCB) and hydrogen-deficient carbon (HdC) stars are analyzed by synthesizing the C2 Swan bands (1, 0), (0, 0), and (0, 1) using our detailed line list and the Uppsala model atmospheres. ...
  • Detection of IMBHs from microlensing in globular clusters 
    Safonova, M; Rahvar, S (Cambridge University Press, 2007-04)
    Globular clusters have been long predicted to host intermediate-mass black holes (IMBHs) in their centres. The growing evidence that some/all Galactic globular clusters (GCs) could harbour middle range (102 – 104Mxs2299) ...
  • North-south asymmetry in solar activity: predicting the amplitude of the next solar cycle 
    Javaraiah, J (Wiley-Blackwell, 2007-05)
    Using Greenwich and Solar Optical Observing Network sunspot group data obtained during the period 1874-2005, we find that the sums of the areas of the sunspot groups in the 0°-10° latitude-interval of the Sun's northern ...
  • Studies of waves in sunspots using spectropolarimetric observations 
    MacDonald, G. A; Rajaguru, S. P (Cambridge University Press, 2011-08)
    We observe the acoustic velocity oscillations in and near active region NOAA 10960 on 8 June, 2007 using observations from the IBIS instrument at the Dunn Solar Telescope at NSO/Sacramento Peak and simultaneous Hinode ...
  • Supergranulation and its Activity Dependence 
    Paniveni, U; Krishan, V; Singh, J; Srikanth, R (Cambridge University Press, 2011-08)
    We study the complexity of supergranular cells using the intensity patterns obtained at the Kodaikanal solar observatory during the solar maximum. Our data consists of visually identified supergranular cells, from which a ...

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