IIA Institutional Repository: Recent submissions

  • Relativistic many-body analysis of the electric dipole moment of 223 Rn 
    Sahoo, B. K; Singh, Yashpal; Das, B. P (American Physical Society, 2014-11)
    We report the results of our ab initio relativistic many-body calculations of the electric dipole moment (EDM) d(A) arising from the electron-nucleus tensor-pseudotensor (T-PT) interaction, the interaction of the nuclear ...
  • Deep optical survey of the stellar content of Sh2-311 region 
    Yadav, Ram Kesh; Pandey, A. K; Sharma, Saurabh; Jose, J; Ogura, K; Kobayashi, N; Samal, M. R; Eswaraiah, C; Chandola, H. C (Elsevier, 2015-01)
    The stellar content in and around Sh2-311 region have been studied using the deep optical observations as well as near-infrared (NIR) data from 2MASS. The region contains three clusters, viz. NGC 2467, Haffner 18 and Haffner ...
  • Aerosol radiative forcing over a high-altitude station Merak, in the trans-Himalayan region during advection of anthropogenic events from the Indo-Gangetic Plain 
    Shantikumar, N. S; Bagare, S. P; Srivastava, A. K; Sohn, B. J; Song, H.-J; Larson, E (Elsevier B.V, 2014-12)
    Advection of anthropogenic aerosols from the Indo-Gangetic Plain (IGP) and dust aerosols from distant deserts towards a high-altitude station Merak, in the trans-Himalayan region are reported during June–July 2011. In order ...
  • Speckle imaging with hypertelescopes 
    Surya, A; Saha, S. K; Labeyrie, A (Oxford University Press on behalf of the Royal Astronomical Society, 2014-09-01)
    Optical stellar interferometers have demonstrated milliarcsecond resolution with few apertures spaced hundreds of metres apart. To obtain rich direct images, many apertures will be needed, for a better sampling of the ...
  • Polarimetric analysis of the Thirty Meter Telescope (TMT) for modeling instrumental polarization characteristics 
    Atwood, J; Skidmore, W; Anupama, G. C; Ramya, M. Anche; Krishna Reddy; Sen, Asoke (SPIE--The International Society for Optical Engineering, 2014-08)
    The Thirty Meter Telescope (TMT) will be called upon to support a polarimetric observing capability. Many different observing programs covering a range of different science areas are being considered for the TMT and a model ...
  • An Estimate of the Coronal Magnetic Field near a Solar Coronal Mass Ejection from Low-frequency Radio Observations 
    Hariharan, K; Ramesh, R; Kishore, P; Kathiravan, C; Gopalswamy, N (IOP Publishing, 2014-11-01)
    We report ground-based, low-frequency (<100 MHz) radio imaging, spectral, and polarimeter observations of the type II radio burst associated with the solar coronal mass ejection (CME) that occurred on 2013 May 2. The ...
  • Optical observations of the fast declining Type Ib supernova iPTF13bvn 
    Srivastav, S; Anupama, G. C; Sahu, D. K (Oxford University Press on behalf of the Royal Astronomical Society, 2014-12-01)
    We present optical UBVRI photometry and medium resolution spectroscopy of the Type Ib supernova iPTF13bvn, spanning a phase of ∼−13 d to +71 d with respect to B-band maximum. The post-maximum decline rates indicate a fast ...
  • Application of relativistic coupled-cluster theory to the effective electric field in YbF 
    Abe, M; Gopakumar, G; Hada, M; Das, B. P; Tatewaki, H; Mukherjee, D (The American Physical Society, 2014-08)
    An accurate determination of the effective electric field (Eeff) in YbF is important as it can be combined with the results of future experiments to give an improved new limit for the electric dipole moment of the electron. ...
  • Quantum phases of attractive bosons on a Bose-Hubbard ladder with three-body constraint 
    Singh, Manpreet; Mishra, T; Pai, Ramesh V; Das, B. P (The American Physical Society, 2014-07)
    We obtain the complete quantum phase diagram of bosons on a two-leg ladder in the presence of attractive onsite and repulsive interchain nearest-neighbor interactions by imposing the onsite three-body constraint. We find ...
  • Relativistic equation-of-motion coupled-cluster method for the double-ionization potentials of closed-shell atoms 
    Pathak, H; Ghosh, A; Sahoo, B. K; Das, B. P; Vaval, N; Pal, S (The American Physical Society, 2014-07)
    We report the implementation of the relativistic equation-of-motion coupled-cluster method to calculate the double-ionization spectra (DI-EOMCC) of the closed-shell atomic systems. This method is employed to calculate the ...
  • Observational Aspects Of Core Collapse Supernovae 
    Gurugubelli, Uday Kumar (Indian Institute of Astrophysics, 2010-11)
    The discovery of several bright supernovae (SNe) in recent years has evoked a great deal of interest in these objects. The study of these objects are of importance not only as probes to the end stages of stellar evolution, ...
  • Discovery of Dramatic Optical Variability in SDSS J1100+4421: A Peculiar Radio-loud Narrow-line Seyfert 1 Galaxy? 
    Tanaka, M; Morokuma, T; Itoh, R; Akitaya, H; Tominaga, N; Saito, Y; Stawarz, L; Tanaka, Y, T; Gandhi, P; Ali, G; Aoki, T; Contreras, C; Doi, M; Essam, A; Hamed, G; Hsiao, E. Y; Iwata, I; Kawabata, K. S; Kawai, N; Kikuchi, Y; Kobayashi, N; Kuroda, D; Maehara, H; Matsumoto, E; Mazzali, P. A; Minezaki, T; Mito, H; Miyata, T; Miyazaki, S; Mori, K; Moritani, Y; Morokuma-Matsui, Kana; Morrell, N; Nagao, T; Nakada, Y; Nakata, F; Noma, C; Ohsuga, K; Okada, N; Phillips, M. M; Pian, E; Richmond, M. W; Sahu, D. K; Sako, S; Sarugaku, Y; Shibata, T; Soyano, T; Stritzinger, M. D; Tachibana, Y; Taddia, F; Takaki, K; Takey, Ali; Tarusawa, K; Ui, T; Ukita, N; Urata, Y; Walker, E. S; Yoshii, T (IOP Publishing, 2014-10-01)
    We present our discovery of dramatic variability in SDSS J1100+4421 by the high-cadence transient survey Kiso Supernova Survey. The source brightened in the optical by at least a factor of three within about half a day. ...
  • iPTF13bvn: The First Evidence of a Binary Progenitor for a Type Ib Supernova 
    Bersten, M. C; Benvenuto, O. G; Folatelli, G; Nomoto, K; Kuncarayakti, H; Srivastav, Shubham; Anupama, G. C; Quimby, R; Sahu, D. K (IOP Publishing, 2014-10)
    The recent detection in archival Hubble Space Telescope images of an object at the location of supernova (SN) iPTF13bvn may represent the first direct evidence of the progenitor of a Type Ib SN. The object's photometry was ...
  • Nonlinear Force-free Field Modeling of the Solar Magnetic Carpet and Comparison with SDO/HMI and Sunrise/IMaX Observations 
    Chitta, L. P; Kariyappa, R; van Ballegooijen, A. A; DeLuca, E. E; Solanki, S. K (IOP Publishing, 2014-10-01)
    In the quiet solar photosphere, the mixed polarity fields form a magnetic carpet that continuously evolves due to dynamical interaction between the convective motions and magnetic field. This interplay is a viable source ...
  • On the Binary Helium Star DY Centauri: Chemical Composition and Evolutionary State 
    Pandey, G; Kameswara Rao, N; Jeffery, C. S; Lambert, D. L (IOP Publishing, 2014-10-01)
    DY Cen has shown a steady fading of its visual light by about one magnitude in the last 40 yr, suggesting a secular increase in its effective temperature. We have conducted non-local thermodynamic equilibrium (LTE) and LTE ...
  • The Quantum Interference Effects in the Sc II 4247 Å Line of the Second Solar Spectrum 
    Smitha, H. N; Nagendra, K. N; Stenflo, J. O; Bianda, M; Ramelli, R (IOP Publishing, 2014-10-10)
    The Sc II 4247 Å line formed in the chromosphere is one of the lines well known, like the Na I D2 and Ba II D2, for its prominent triple-peak structure in Q/I and the underlying quantum interference effects governing it. ...
  • Effect of Cross-redistribution on the Resonance Scattering Polarization of O I Line at 1302 Å 
    Anusha, L. S; Nagendra, K. N; Uitenbroek, H (IOP Publishing, 2014-10-10)
    Oxygen is the most abundant element on the Sun after hydrogen and helium. The intensity spectrum of resonance lines of neutral oxygen, namely, O I (1302, 1305, and 1306 Å), has been studied in the literature for chromospheric ...
  • Polarized Light Scattering with the Paschen-Back Effect, Level-crossing of Fine Structure States, and Partial Frequency Redistribution 
    Sowmya, K; Nagendra, K. N; Sampoorna, M; Stenflo, J. O (IOP Publishing, 2014-10-01)
    The quantum interference between the fine structure states of an atom modifies the shapes of the emergent Stokes profiles in the second solar spectrum. This phenomenon has been studied in great detail both in the presence ...
  • Stellar Content and Star Formation in Young Clusters Influenced by Massive Stars 
    Jose, J (American Astronomical Society, 2014-09)
    Star Formation (SF) in extreme environment is always challenging and can be significantly different from that in quiet environments. This study presents the comprehensive multi-wavelength (optical, NIR, MIR and radio) ...
  • Young stellar population of bright-rimmed clouds BRC 5, BRC 7 and BRC 39 
    Panwar, N; Chen, W. P; Pandey, A. K; Samal, M. R; Ogura, K; Ojha, D. K; Jose, J; Bhatt, B. C (Oxford University Press on behalf of the Royal Astronomical Society, 2014-09-11)
    Bright-rimmed clouds (BRCs), illuminated and shaped by nearby OB stars, are potential sites of recent/ongoing star formation. Here we present an optical and infrared photometric study of three BRCs: BRC 5, BRC 7 and BRC ...

Search DSpace

Browse

My Account