IIAP Publications: Recent submissions

  • The galactic thick disk: an observational perspective 
    Reddy, B. E (Cambridge University Press, 2010-03)
    In this review, we present a brief description of observational efforts to understand the Galactic thick disk and its relation to the other Galactic components. This review primarily focused on elemental abundance patterns ...
  • Triggered Star Formation and Young Stellar Population in Bright-rimmed Cloud SFO 38 
    Choudhury, R; Mookerjea, B; Bhatt, H. C (IOP Publishing, 2010-07-10)
    We have investigated the young stellar population in and around SFO 38, one of the massive globules located in the northern part of the Galactic H II region IC 1396, using the Spitzer IRAC and MIPS observations (3.6-24 ...
  • Discrete Space Theory of Radiative Transfer: Application 
    Srinivasa Rao, M (Springer, 2010)
    The method of obtaining the solution of radiative transfer equation using discrete space theory (DST) is described with (1) interaction principle for different geometries (2) star product (3) calculation of radiation field ...
  • Simultaneous X-ray and Optical Observations of the T Tauri star TW Hya 
    Mallik, S. G. V; Brickhouse, N. S; Dupree, A. K (Springer, 2010)
    We report preliminary results obtained from a spectroscopy and photometry campaign of the T Tauri star TW Hya in February- March, 2007. A long HETG observation with CHANDRA and simultaneous optical observations around the ...
  • Elemental abundances in CEMP stars: r– and s–process elements 
    Goswami, A; Athiray, S. P; Drisya, K (Springer, 2010)
    A number of Carbon-Enhanced Metal-poor (CEMP) stars are known to exhibit enhancement of both r – and s – process elements. An understanding of the relative contributions from r – and s – process would provide insight into ...
  • An improved Technique to Explore Disk Accretion Process in PMS Stars 
    Parihar, P. S (Springer, 2010)
    The low mass PMS stars are found to be surrounded by thick, flared accretion disk and the disk material is supposed to be funneled onto the stellar surface by strong and predominately dipolar magnetic field. We have developed ...
  • Far-ultraviolet Diffuse Emission from the Large Magellanic Cloud 
    Pradhan, A. C; Pathak, A; Murthy, J (IOP Publishing, 2010-08)
    We present the first observations of diffuse radiation in the far-ultraviolet (FUV; 1000-1150 Å) from the Large Magellanic Cloud based on observations made with the Far Ultraviolet Spectroscopic Explorer. The fraction of ...
  • Recent Developments in Polarized Line Formation in Magnetic Fields 
    Nagendra, K. N; Sampoorna, M; Anusha, L. S (Springer, 2010)
    The nature of solar surface magnetism has been an open problem in solar physics. In this paper we address three frontline problems of spectropolarimetry of the Sun. We first review the theoretical formulation and numerical ...
  • Accelerating waves in polar coronal holes as seen by EIS and SUMER 
    Gupta, G. R; Banerjee, D; Teriaca, L; Imada, S; Solanki, S (IOP Science, 2010-07-20)
    We present EIS/Hinode and SUMER/SOHO observations of propagating disturbances detected in coronal lines in inter-plume and plume regions of a polar coronal hole. The observation was carried out on 2007 November 13 as part ...
  • Absolute emission altitude of pulsars: PSRs B1839+09, B1916+14, and B2111+46 
    Thomas, R. M. C; Gangadhara, R. T (EDP Science, 2010-06)
    Aims. We study the mean profiles of the multi-component pulsars PSRs B1839+09, B1916+14 and B2111+46. We estimate the emission height of the core components, and hence find the absolute emission altitudes corresponding to ...
  • Dither-based sensor for improved consistency of adaptive optics system 
    Vyas, A; Roopashree, M. B; Prasad, B. R (SPIE--The International Society for Optical Engineering, 2010-07)
    The wavefront reconstruction accuracy in Shack Hartmann sensor based adaptive optics system depends on accurate centroiding and phase estimation from measured slope values. Monte Carlo simulations of vector matrix multiply ...
  • Optimizing the modal index of Zernike polynomials for regulated phase screen simulation 
    Vyas, A; Roopashree, M. B; Prasad, B. R (SPIE--The International Society for Optical Engineering, 2010-07)
    Simulations of optical wavefronts propagating through the atmosphere are widely used in the design and testing of adaptive optics systems. Phase screens are defined by their spatial and temporal statistics. In many ...
  • Seismic and spectroscopic characterization of the solar-like pulsating CoRoT target HD 49385 
    Deheuvels, S; Bruntt, H; Michel, E; Barban, C; Verner, G; Régulo, C; Mosser, B; Mathur, S; Gaulme, P; Garcia, R. A; Boumier, P; Appourchaux, T; Samadi, R; Catala, C; Baudin, F; Baglin, A; Auvergne, M; Roxburgh, I. W; Pérez Hernández, F (EDP Science, 2010-06-11)
    Context. The star HD 49385 is the first G-type solar-like pulsator observed in the seismology field of the space telescope CoRoT. The satellite collected 137 days of high-precision photometric data on this star, confirming ...
  • On the rotational temperature of AlH in Sunspots 
    Karthikeyan, B; Rajamanickam, N; Bagare, S. P (Springer, 2010-07)
    A search has been carried out for the presence of rotational lines of two bands of the (0, 0) and (1, 1) A 1Π – X 1Σ+ system of the AlH molecule in the high resolution Fourier Transform Spectra of sunspots observed at the ...
  • Multilayered temporally evolving phase screens based on statistical interpolation 
    Roopashree, M. B; Vyas, A; Prasad, B. R (SPIE--The International Society for Optical Engineering, 2010-07)
    Simulation of the dynamic effects of atmospheric turbulence assists in understanding, testing and effective implementation of adaptive optics systems. Statistical interpolation technique helps in retaining the spatial ...
  • Noise reduction in the centroiding of laser guide star spot pattern using thresholded Zernike reconstructor 
    Vyas, A; Roopashree, M. B; Prasad, B. R (SPIE--The International Society for Optical Engineering., 2010-07)
    Centroiding inaccuracies contribute to most of the wavefront reconstruction error in a Shack Hartmann sensor based adaptive optics system. These errors primarily occur due to the presence of photon noise, readout noise, ...
  • Radio observations of weak energy releases in the solar corona 
    Ramesh, R; Kathiravan, C; Barve, Indrajit V; Beeharry, G. K; Rajasekara, G. N (IOP Science, 2010-08-10)
    We report observations of weak, circularly polarized, structureless type III bursts from the solar corona in the absence of Hα/X-ray flares and other related activity, during the minimum between the sunspot cycles 23 and ...
  • Phase variability of Sq (H) on normal quiet days in the equatorial electrojet region 
    Sastri, J. H (Royal Astronomical Society, 1982-10)
    From a study of ‘abnormal quiet days’ (AQDs) at equatorial latitudes it was found earlier (Sastri) that the occurrence of an abnormal Sq(H) phase confined to the equatorial electrojet belt is closely associated with the ...
  • Physical process at super-high energies 
    Datta, B (Einstein Foundation International, 1983)
  • Two-wave mixing and light-induced absorption dynamics in photorefractive BaTiO3 crystals 
    Banyal, R. K; Prasad, B. R (Indian Institute of Science, 2003-08)
    Steady-state and temporal measurements of TWM and LIA have been carried out in PR BaTiO3 crystals at different wavelengths and intensities of laser light. The observed behavior is interpreted in terms of two-center charge ...

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