IIAP Publications: Recent submissions

  • Altitude and azimuth of the Sun 
    Ganguly, S. R (Indian Meteorological Department, 1954-01)
  • Solar Prominences in 1972 
    Bappu, M. K. V (Royal Astronomical Society, 1973-12)
  • Solar Activity-Prominences 
    Bappu, M. K. V (1964-09)
  • An Analysis of Ultraviolet Spectra of Extreme Helium Stars and New Clues to Their Origins 
    Pandey, G; Lambert, D. L; Simon, C. S; Kameswara Rao, N (University of Chicago Press, 2006-02)
    Abundances of about 18 elements including the heavy elements Y and Zr are determined from Hubble Space Telescope Space Telescope Imaging Spectrograph ultraviolet spectra of seven extreme helium stars (EHes): LSE 78, BD +10 ...
  • GMRT Observations of the 2006 outburst of the Nova RS Ophiuchi: First detection of emission at radio frequencies < 1.4 GHz 
    Kantharia, N. G; Anupama, G. C; Prabhu, T. P; Ramya, S; Bode, M. F; Eyres, S. P. S; O'Brien, T. J (University of Chicago Press, 2007-10)
    The first low radio frequency (<1.4 GHz) detection of the outburst of the recurrent nova RS Ophiuchi is presented in this Letter. Radio emission was detected at 0.61 GHz on day 20 with a flux density of 48 mJy and at 0.325 ...
  • Measurement of Dust Optical Properties in Coalsack Nebula 
    Sujatha, N. V; Murthy, J; Shalima, P (University of Chicago Press, 2007-08)
    We have used FUSE and Voyager observations of dust-scattered starlight in the neighborhood of the Coalsack Nebula to derive the optical constants of the dust grains. The albedo is consistent with a value of 0.28 ± 0.04, ...
  • Scattering of light by a periodic structure in the presence of randomness. V. Detection of successive peaks in a periodic structure 
    Vani, V. C; Chatterjee, S (Optical Society of America, 2006-12)
    We address the problem of detecting periodic structures hidden behind roughness. We have shown that if r0 is the coherence length of the scattered radiation, due to the random part of the surface, and Lambda is the wavelength ...
  • Polarization of Starlight by Unresolved and Oblate Extra-solar Planet in Elliptical Orbit 
    Sengupta, S; Maiti, M (University of Chicago Press, 2006-03)
    We calculate the degree of linear polarization of radiation from stars having planets that may not be resolved spatially. We assume single scattering by water and silicate particulates in the planetary atmosphere. The ...
  • A statistical study of wave propagation in coronal holes 
    O`Shea, E; Banerjee, D; Doyle, J. G (Astronomy and Astrophysics, Vol. 463, pp. 713 - 725, 2007-02)
    Aims.To find evidence for propagating magnetoacoustic waves in equatorial and polar coronal hole locations. Methods: Using temporal series data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations ...
  • Evidence for wave harmonics in cool loops 
    O'Shea, E; Srivastava, A. K; Doyle, J. G; Banerjee, D (Astronomy and Astrophysics, Vol. 473, pp. L13 - L16, 2007-10)
    Aims.Using temporal series image data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations found in intensity (radiance) measurements from the transition region O V 629 line with the aim of finding ...
  • A study of a macro-spicule and a transition region explosive event in a solar coronal hole 
    Popescu, M. D; Xia, L. D; Banerjee, D; Doyle, J. G (Advances in Space Research, Vol. 40, Issue 7, pp. 1021 - 1025, 2007-02)
    Aims Spicules and the higher macro-spicules (jet-like structures seen at the solar limb) are believed to be the dominant mechanism for mass ejection in the higher solar atmosphere outside active regions. But what is the ...
  • A statistical study of the characteristics of type II doublet radio bursts 
    Subramanian, K. R; Ebenezer, E (EDP Sciences, 2006-05)
    Aims.We study the characteristics of doublet type II radio bursts in which two type II bursts occur in sequence and investigate their drivers. Methods.37 type II bursts reported by the Culgoora radio observatory in the ...
  • Occultation of a solar active region at 1.5 GHz during the eclipse of November 3, 1994 
    Subramanian, K. R; Sawant, H. S; Fernandes, F. C. R; Cecatto, J. R (EDP Sciences, 2006-03)
    We observed the solar eclipse of November 3, 1994 with a 4-m diameter antenna and a radio spectrograph operating at 1.5 ± 0.05 GHz with a time resolution of 100 ms. Here we present the observations of the occultation of ...
  • The PHEMU97 catalogue of observations of the mutual phenomena of the Galilean satellites of Jupiter 
    Arlot, J. -E; Thuillot, T; Ruatti, C; Akasawa, A; Baroni, S; Beisker, W; Berthier, J; Blanco, C; Boonstra, J; Bourgeois, J; Bulder, H; Casas, R; Castano, J. G; Colas, F; Collins, D; Cuypers, J; Czech, W; D'Ambrosio, V; Denzau, H; Descamps, P; Dimitrescu, A; Dinakarian, N; Dourneau, G; Enriquez, J. M; Fernandez, J. M; Fernandez-Barba, D; Flatres, T; Goncalves, M; Guhl, K; Helmer, G; Hirose, T; Irsmambetova, T. R; Krobusek, B. A; Lecacheux, J; Le Campion, J.-F; Lou, M; Mallama, A; Nelson, P; Okura, N; Park, J; Pauwels, T; Pluchino, S; Priban, V; Rapaport, M; Sacré, J.-J; Salvaggio, F; Sanchez, M. A; Sanchez-Bajo, F; Stefanescu, G; Tanga, P; Tejfel, V. G; Trisan, J. L; Trunkovsky, E. M; Vandenbulcke, G; Vasundhara, R; Vass, G; Vingerhoets, P; Vu, D. T; Wilds, R. T (EDP Sciences, 2006-05)
    In 1997 the Sun and the Earth passed through the equatorial plane of Jupiter and therefore through the orbital planes of its main satellites. During this period, mutual eclipses and occultations occurred and were observed. ...
  • Research with a moderate aperture telescope 
    Bappu, M. K. V (1975)
  • Automated classification and stellar parameterization 
    Giridhar, S; Muneer, S; Goswami, A (Memorie della Societa Astronomica Italiana, 2006)
    Different approaches for automated spectral classification are critically reviewed. We describe in detail ANN based methods which are very efficient in quick handling of the large volumes of data generated by different ...
  • Elemental abundance survey of the galactic thick disc 
    Reddy, B. E; Lambert, D. L; Prieto, Carlos Allende (Blackwell Publishing, 2006-04)
    We have performed an abundance analysis for F- and G- dwarfs of the Galactic thick-disc component. A sample of 176 nearby (d≤ 150 pc) thick-disc candidate stars was chosen from the Hipparcos catalogue and subjected to a ...
  • Near-infrared and optical studies of the fast nova V4643 Sgr (Nova Sagittarii 2001) 
    Ashok, N. M; Banerjee, D. P. K; Varricatt, W. P; Kamath, U. S (Blackwell Publishing, 2006-05)
    V4643 Sagittarii or Nova Sagittarii 2001 was discovered in outburst at 7.7 mag on 2001 February 24. Here, we present near-infrared results of this fast classical nova obtained in the early decline phase in 2001 March ...
  • Magnetoacoustic wave propagation in off-limb polar regions 
    O'Shea, E; Banerjee, D; Doyle, J. G (EDP Sciences, 2006-02)
    Aims.To find evidence of magnetoacoustic waves in off-limb polar regions. Methods.Using temporal series data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations found in radiant flux and velocity ...
  • Transition region counterpart of a moving magnetic feature 
    Lin, C. -H; Banerjee, D; O'Shea, E; Doyle, J. G (EDP Sciences, 2006-12)
    this which we seek to address in this work. Aims.In this work we aim to investigate the chromospheric and transition-region dynamics associated with a moving magnetic monopole by using spectral time-series and ...

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