IIAP Publications: Recent submissions

  • Magnetorotational instability in accretion disks 
    Krishan, V; Mahajan, S. M (Springer Netherlands, 2008)
    Accretion disks are a basic and an ubiquitous construct of nature. We describe their formation, briefly and qualitatively, in diverse astrophysical situations. These systems, though controlled by the gravitational forces, ...
  • Alpha effect in partially ionized plasmas 
    Krishan, V; Gangadhara, R. T (Springer Netherlands, 2008)
    There are several astrophysical situations where one needs to study the dynamics of magnetic flux in partially ionized turbulent plasmas. In a partially ionized plasma the magnetic induction is subjected to the ambipolar ...
  • Power spectra of the fluctuations in the solar wind 
    Krishan, V (Springer Netherlands, 2008)
    The power spectra of the velocity, the magnetic field and the density fluctuations and their inter-relationships are investigated in the turbulent solar wind using the dimensional approach of the Kolmogorovic type. While ...
  • Identification of new CeO features in the S star Pi Gruis 
    Murty, P. S (Gordon and Beach, Science Publishers, 1983)
    Spectrograms in the 6040-7300 A wavelength region of the S star Pi Gruis reveal the presence of new molecular features attributable to CeO. Measures of band heads compared reasonably well with the laboratory spectrum. The ...
  • Nonlinear jeans instability in an uniformly rotating gas 
    Chakrabarti, N; Pal, B; Krishan, V (Springer Netherlands, 2008)
    A nonlinear stability analysis of a uniformly rotating gas in a gravitational field has been performed. One dimensional non-linear equations have been solved by the double-Lagrangian transformation method. An explosive ...
  • Magnetic field generation from Alfven waves propagating along helical lines of force 
    Bera, B; Das, C; Chakraborty, B; Khan, M; Krishan, V; Bhattacharyya, B (Springer, 1992-07)
    A static induced magnetization of Alfven waves (IMAW) due to the inverse Faraday effect is defined and studied. The Alfven waves are assumed to propagate along helical lines of force of a force-free ambient magnetic field. ...
  • Star formation in blue compact dwarf galaxies: Mkn 104 and I Zw 97 
    Ramya, S; Sahu, D. K; Prabhu, T. P (Blackwell Publishing, 2009-06)
    Two blue compact dwarf galaxies, Mkn 104 and I Zw 97, are studied photometrically and spectroscopically. Mkn 104 is found to contain three distinct bright star-forming regions, whereas I Zw 97 is found to contain three ...
  • An atmosphere on Ganymede from its occultation of SAO 186800 on 7 June 1972 
    Carlson, R. W; Bhattacharyya, J. C; Smith, B. A; Johnson, T. V; Hidayat, B; Smith, S. A; Taylor, G. E; O'Leary, B; Brinkmann, R. T (The American Association for the Advancement of Science, 1973-09)
    On 7 June 1972 the third Jovian satellite Ganymede occulted the eighth-magnitude star SAO 186800. Successful photoelectric observations obtained at Lembang, Java (Indonesia), and Kavalur, India, show nonabrupt immersions ...
  • Solar asymmetry and sun-earth connections 
    Georgieva, K; Kirov, B; Javaraiah, J (European Space Agency, 2003-09)
    The effect of solar activity on climate depends on the North-South solar activity asymmetry: the correlation between solar activity and a number of meteorological elements has opposite signs for predominantly more active ...
  • Short-term variations in solar rotation rate and solar wind parameters 
    Georgieva, K; Javaraiah, J; Kirov, B; Atanasov, D (European Space Agency, 2002-12)
    The components of the interplanetary magnetic field (IMF) at the Earth's orbit are described by the model of Parker [1958]. In it, the solar rotation rate is assumed constant. In the present paper we compare in-situ ...
  • Depth dependence of the periodicities in solar differential rotation 
    Javaraiah, J (European Space Agency, 1998-10)
    Earlier, we showed existence of `20 yr' periodicity in the variations of the differential rotation coefficient B determined from Greenwich sunspot group data during 1879-1976 (Javaraiah and Gokhale, 1995). Recently, we ...
  • Solar differential rotation and properties of magnetic clouds 
    Georgieva, K; Kirov, B; Gavruseva, E; Javaraiah, J (European Space Agency, 2005-12)
    The most geoeffective solar drivers are magnetic clouds - a subclass of coronal mass ejections (CME's) distinguished by the smooth rotation of the magnetic field inside the structure. The portion of CME's that are magnetic ...
  • 22-year periodicity in solar rotation, solar wind parameters and earth rotation 
    Kirov, B; Georgieva, K; Javaraiah, J (European Space Agency, 2002-12)
    It is generally accepted that the annual variation in the Earth's rotation rate is fully determined by large-scale seasonal changes in atmospheric circulation, while the decadal changes in Earth's rotation have been shown ...
  • Council report on solar activity in 1939: Prominences 
    Narayan, A. L (Royal Astronomical Society, 1940-02)
  • Relationship between magnetic structures of small and large sunspot groups 
    Javaraiah, J (Astronomical Society of the Pacific, 2003)
    Using the data on sunspot groups of life span (T, in days) 2-12day during 1874-1981 we find: (i) the average area (A, in millionth of solar hemisphere) of a spot group increase with T as A(T) = 15.24 exp (T/4.48); and (ii) ...
  • Signatures of Alfven waves in the polar coronal holes as seen by EIS/Hinode 
    Banerjee, D; Perez-Suarez, D; Doyle, J. G (2009-06-26)
    Context. We diagnose the properties of the plume and interplume regions in a polar coronal hole and the role of waves in the acceleration of the solar wind. Aims. We attempt to detect whether Alfven waves are present in ...
  • Theory of holographic plane gratings 
    Singh, M (National Institute of Science Communication And Information Resources, 1977-05)
    Theory of holographically recorded plane diffraction gratings (HRPDG) has been presented. In general HRPDG with have curved grooves with variable spacing. The self focussing property of HRPDG has been studied in detail. ...
  • Total electron concentration of the ionosphere over the magnetic equator 
    Rastogi, R. G; Iyer, K. N; Bhattacharyya, J. C (Indian Academy of Sciences, 1975-08)
  • Equatorial spread - F configurations and magnetic activity 
    Sastri, J. H; Murthy, B. S; Sashidharan, K (Indian Academy of Sciences, 1975-10)
  • A note on sudden field anomaly patterns (SFA) 
    Sastri, J. H (Indian Academy of Sciences, 1975-06)

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