IIAP Publications: Recent submissions

  • The Equatorial Background Solar Corona during Solar Minimum 
    Ramesh, R; Nataraj, H. S; Kathiravan, C; Sastry, Ch. V (University of Chicago Press, 2006-09)
    We report two-frequency (51 and 77 MHz) radio observations of the equatorial brightness distribution of the “undisturbed” solar corona, close to the minimum between sunspot cycles 22 and 23. The contributions from different ...
  • The Post-Coronal Mass Ejection Solar Atmosphere and Radio Noise Storm Activity 
    Kathiravan, C; Ramesh, R; Nataraj, H. S (University of Chicago Press., 2007-02)
    We carried out a statistical study of solar radio noise storms whose onset was in the aftermath of coronal mass ejections (CMEs) that occurred during 1997–2004, the first half of present solar cycle 23. The work is an ...
  • Brazilian Decimetre Array (Phase-1): Initial solar observations 
    Ramesh, R; Sawant, H. S; Cecatto, J. R; Faria, C; Fernandes, F. C. R; Kathiravan, C; Suryanarayana, G. S (Elsevier B.V, 2007-02)
    An East–West one-dimensional radio interferometer array consisting of 5 parabolic dish antennas has been set-up at Cachoeira Paulista, Brazil (Longitude: 45°0′20″W, Latitude: 22°41′19″S) for observations of Sun and some ...
  • Cylindrical Hall – MHD Waves: A Nonlinear Solution 
    Krishan, V; Varghese, B. A (Springer Netherlands, 2008-01)
    The exact nonlinear cylindrical solution for incompressible Hall – magnetohydrodynamic (HMHD) waves, including dissipation, essentially from electron – neutral collisions, is obtained in a uniformly rotating, weakly ionized ...
  • Irregular Singularity of the Magnetorotational Instability in a Keplerian Disk 
    Furukawa, M; Yoshida, Z; Hirota, M; Krishan, V (University of Chicago Press, 2007-04)
    The center of a Keplerian disk is an irregular singularity for the eigenfunctions of magnetorotational instabilities. The system is studied using the small-radius approximation, which by no means implies that the analysis ...
  • Spatial damping of compressional MHD waves in prominences 
    Singh, K. A. P; Dwivedi, B. N; Hasan, S. S (EDP Sciences, 2007-10)
    Aims.We study the spatial damping of linear compressional MHD waves in a homogeneous, isothermal, and unbounded prominence. Methods.We derive a general dispersion relation invoking the Newtonian radiation and turbulent ...
  • CCD photometry of the globular cluster NGC 5466. RR Lyrae light-curve decomposition and the distance scale 
    Arellano Ferro, A; Rojas López, V; Giridhar, S; Bramich, D. M (Blackwell Synergy, 2008-03)
    We report the results of CCD V and r photometry of the globular cluster NGC 5466. The difference image analysis technique adopted in this work has resulted in accurate time-series photometry even in crowded regions of the ...
  • The Chemical Compositions of the Type II Cepheids-The BL Herculis and W Virginis Variables 
    Maas, T; Giridhar, S; Lambert, D. L (University of Chicago Press, 2007-09)
    Abundance analyses from high-resolution optical spectra are presented for 19 type II Cepheids in the Galactic field. The sample includes both short-period (BL Her) and long-period (W Vir) stars. This is the first extensive ...
  • Brazilian Decimetric Array (Phase-I) 
    Sawant, H. S; Ramesh, R; Cecatto, J. R; Faria, C; Fernandes, F. C. R; Rosa, R. R; Andrade, M. C; Stephany, S; Cividanes, L. B. T; Miranda, C. I. A; Botti, L. C. L; Boas, J. W. S. V; Saito, J. H; Moron, C. E; Mascarenhas, N. D; Subramanian, K. R; Sundararajan, M. S; Ebenezer, E; Sankararaman, M. R (Springer Netherlands, 2007-05)
    An East – West, one-dimensional radio interferometer array consisting of five parabolic dish antennas has been set up at Cachoeira Paulista (longitude 45°0′20″ W, latitude 22°41′19″ S) for observations of the Sun and some ...
  • Detection of a new Be Star - gamma Lup 
    Ghosh, K. K; Kuppuswamy, K; Jaykumar, K; Rosario, M. J; Velu, C (Konkoly Observatory, 1987-08)
  • The dark nature of GRB 051022 and its host galaxy 
    Castro-Tirado, A. J; Bremer, M; McBreen, S; Gorosabel, J; Guziy, S; Fakthullin, T. A; Sokolov, V. V; González Delgado, R. M; Bihain, G; Pandey, S. B; Jelínek, M; de Ugarte Postigo, A; Misra, K; Sagar, R; Bama, P; Kamble, A. P; Anupama, G. C; Licandro, J; Pérez-Ramírez, D; Bhattacharya, D; Aceituno, F. J; Neri, R (EDP Sciences, 2007-11)
    Aims.We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 h and ~1.15 yr after the event. It is the most intense gamma-ray burst (~10-4 erg cm-2) detected by HETE-2, ...
  • Some useful data for the astrophysical molecules AlS and BS 
    Karthikeyan, B; Rajamanickam, N; Bagare, S. P (Elsevier B.V, 2007-06)
    The vibronic (vibration-electronic) transition probability parameters such as Franck-Condon (FC) factors and r-centroids of diatomic molecular species could be useful in the identification of molecular lines and in the ...
  • On the Franck-Condon factors and R-centroids of the astrophysically interesting molecule CS 
    Karthikeyan, B; Raja, V; Rajamanickam, N; Bagare, S. P (National Library of Serbia, 2007-12)
    In molecular astrophysics, the Franck-Condon (FC) factors and r-centroids are essential for the interpretation of spectral intensities in terms of emitting astrophysical source conditions. They have been evaluated for the ...
  • An Evolved Disk Surrounding the Massive Main-Sequence Star MWC 297? 
    Manoj, P; Ho, P. T. P; Ohashi, N; Zhang, Q; Hasegawa, T; Chen, H - R; Bhatt, H. C; Ashok, N. M (University of Chicago Press, 2007-10)
    We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the () rotational transitions of 12CO,13CO, and C18O using the Submillimeter ...
  • Champagne flow and triggered star formation in NGC 1893 
    Maheswar, G; Sharma, S; Biman, J. M; Pandey, A. K; Bhatt, H. C (Blackwell Synergy, 2007-08)
    Using Hα grism spectroscopy and optical and Two-Micron All-Sky Survey photometry of the fields containing NGC 1893 and two emission nebulae, Sim 129 and Sim 130, we show the presence of a number of Hα and near-infrared ...
  • Hanle-Zeeman Redistribution Matrix. II. Comparison of Classical and Quantum Electrodynamic Approaches 
    Sampoorna, M; Nagendra, K. N; Stenflo, J. O (University of Chicago Press, 2007-12)
    The Hanle-Zeeman redistribution matrix accounts for the intricately coupled correlations in frequency, angle, and polarization between the incoming and outgoing radiation and embodies the physics of the scattering process. ...
  • Jet in seyfert galaxies 
    Shastri, P; Lal, D. V; Gabuzda, D. C (Astronomical Society of the Pacific, 2003)
    We will present the main results from a study of the pc-scale radio structure of our matched sample of Seyfert galaxies, specifically selected to test the Unified Scheme. We chose purportedly face-on (Seyfert 1) and edge-on ...
  • Fluorine in R Coronae Borealis Stars 
    Pandey, G; Lambert, D. L; Kameswara Rao, N (Astronomical Society of the Pacific, 2008)
    Neutral fluorine lines are identified in the optical spectra of several R Coronae Borealis stars (RCBs) at maximum light. These lines provide the first measurement of the fluorine abundance in these stars. Fluorine is ...
  • Fluorine in R Coronae Borealis Stars 
    Pandey, G; Lambert, D. L; Kameswara Rao, N (University of Chicago Press, 2008-02)
    Neutral fluorine (F i) lines are identified in the optical spectra of several R Coronae Borealis stars (RCBs) at maximum light. These lines provide the first measurement of the fluorine abundance in these stars. Fluorine ...
  • High-resolution spectroscopy of the R Coronae Borealis star V Coronae Australis 
    Kameswara Rao, N; Lambert, D. L (Blackwell Synergy, 2008-02)
    Optical high-resolution spectra of the R Coronae Borealis star V CrA at light maximum and during minimum light are discussed. Abundance analysis confirms previous results showing that V CrA has the composition of the small ...

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