IIA Institutional Repository: Recent submissions

  • VBT News, Number 8 & 9, October 1991 
    Rajamohan, R (Indian Institute of Astrophysics, 1991-10)
  • VBT News, Number 6 & 7, April 1991 
    Rajamohan, R (Indian Institute of Astrophysics, 1991-04)
  • VBT News, Number 5, October 1990 
    Rajamohan, R (Indian Institute of Astrophysics, 1990-10)
  • VBT News, Number 4, June 1990 
    Rajamohan, R (Indian Institute of Astrophysics, 1990-06)
  • VBT News, Number 3, April 1990 
    Rajamohan, R (Indian Institute of Astrophysics, 1990-04)
  • VBT News, Number 2, January 1990 
    Rajamohan, R (Indian Institute of Astrophysics, 1990-01)
  • VBT News, Number 1, October 1989 
    Rajamohan, R (Indian Institute of Astrophysics, 1989-10)
  • Observations of the Solar Ca I 4227 Å Line 
    Bianda, M; Ramelli, R; Stenflo, J. O; Anusha, L. S; Nagendra, K. N; Sampoorna, M; Holzreuter, R; Frisch, H (Astronomical Society of the Pacific, 2011-04)
    Our aim is to understand some interesting polarization features observed in the solar Ca I 4277 Å line. Here we only discuss the observational aspects. Observations have also been made in other chromospheric lines within ...
  • Spectroscopy of Protonated and Deprotonated PAHs 
    Hammonds, M; Pathak, A; Candian, A; Sarre, P. J (EDP Sciences, 2011-03)
    The spectroscopic properties of protonated and deprotonated PAHs are investigated through Density Functional Theory (DFT) calculations, with reference to their potential astrophysical significance. Attention is focussed ...
  • After the moon, ISRO eyes the sun (IIA in NDTV News) 
    NDTV (NDTV, 2011-06-09)
    The Indian Space Research Organisation is now putting together its first dedicated mission to study the sun, aptly called Aditya-1. NDTV travelled to ISRO's labs to get you this exclusive.
  • Linear Polarization of the Solar Ca I 4227 Å Line: Modeling with Radiative Transfer and Last Scattering Approximation 
    Anusha, L. S; Stenflo, J. O; Frisch, H; Bianda, M; Holzreuter, R; Nagendra, K. N; Sampoorna, M; Ramelli, R (Astronomical Society of the Pacific, 2011-04)
    To model the Ca I 4227 Å line polarization, radiative transfer effects with partial frequency redistribution (PRD) must be taken into account. The numerical solution of the relevant polarized radiative transfer (RT) equations ...
  • Celebrating mariner's magic 
    Sivaram, C (Deccan Herald, 2011-05-31)
  • Jantar Mantar Or Vedhashala? 
    Kapoor, R. C (The Hawk, 2011-06-04)
  • Quantum phases of ultracold bosonic atoms in a one-dimensional optical superlattice 
    Dhar, A; Mishra, T; Pai, R. V; Das, B. P (American Physical Society, 2011-05)
    We analyze various quantum phases of ultracold bosonic atoms in a periodic one-dimensional optical superlattice. Our studies have been performed using the finite-size density-matrix renormalization group method in the ...
  • Reappraisal of the Electric Dipole Moment Enhancement Factor for Thallium 
    Nataraj, H. S; Sahoo, B. K; Das, B. P; Mukherjee, D (American Physical Society, 2011-05-20)
    The electric dipole moment (EDM) enhancement factor of atomic Tl is of considerable interest as it has been used in determining the most accurate limit on the electron EDM to date. However, its value varies from -179 to ...
  • Low-frequency Observations of Polarized Emission from Long-lived Non-thermal Radio Sources in the Solar Corona 
    Ramesh, R; Kathiravan, C; Satya Narayanan, A (IOP Publishing, 2011-06-10)
    We report observations of circularly polarized emission from the solar corona at 77 MHz during the periods 2006 August 11-18, 2006 August 23-29, and 2007 May 16-22 in the minimum phase between the sunspot cycles 23 and 24. ...
  • Dust-scattered Ultraviolet Halos around Bright Stars 
    Murthy, J; Conn Henry, R (IOP Publishing, 2011-06-10)
    We have discovered ultraviolet (UV) halos extending as far as 5° around four (of six) bright UV stars using data from the Galaxy Evolution Explorer satellite. These halos are due to scattering of the starlight from nearby ...
  • Observations of the forward scattering Hanle effect in the Ca I  4227 Å  line 
    Bianda, M; Ramelli, R; Anusha, L. S; Stenflo, J. O; Nagendra, K. N; Holzreuter, R; Sampoorna, M; Frisch, H; Smitha, H. N (EDP Sciences, 2011-06)
    Chromospheric magnetic fields are notoriously difficult to measure. The chromospheric lines are broad, while the fields are producing a minuscule Zeeman-effect polarization. A promising diagnostic alternative is provided ...
  • Extrapolating Zernike Moments to Predict Future Optical Wave-fronts in Adaptive Optics Using Real Time Data Mining 
    Vyas, A; Roopashree, M. B; Prasad, B. R (David Publishing Company, 2011-03)
    We present the details of predicting atmospheric turbulence by mining Zernike moment data obtained from simulations as well as experiments. Temporally correlated optical wave-fronts were simulated such that they followed ...
  • Deep Impact, Stardust-NExT and the behavior of Comet 9P/Tempel 1 from 1997 to 2010 
    Meech, K. J; Pittichova, J; Yang, B; Zenn, A; Belton, M. J. S; A’Hearn, M. F; Bagnulo, S; Bai, J; Barrera, L; Bauer, J. M; Bedient, J; Bhatt, B. C; Boehnhardt, H; Brosch, N; Buie, M; Candia, P; Chen, W; Chesley, S; Chiang, P; Choi, Y; Cochran, A; Duddy, S; Farnham, T. L; Fernández, Y; Gutiérrez, P; Hainaut, O. R; Hampton, D; Herrmann, K; Hsieh, H; Kadooka, M. A; Kaluna, H; Keane, J; Kim, M; Kleyna, J; Krisciunas, K; Lauer, T. R; Lara, L; Licandro, J; Lowry, S. C; McFadden, L. A; Moskovitz, N; Mueller, B. E. A; Polishook, D; Raja, N. S; Riesen, T; Sahu, D. K; Samarasinha, N. H; Sarid, G; Sekiguchi, T; Sonnett, S; Suntzeff, N; Taylor, B; Tozzi, G. P; Vasundhara, R; Vincent, J; Wasserman, L; Webster-Schultz, B; Zhao, H (Elsevier B.V., 2011-05)
    We present observational data for Comet 9P/Tempel 1 taken from 1997 through 2010 in an international collaboration in support of the Deep Impact and Stardust-NExT missions. The data were obtained to characterize the nucleus ...

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