IIAP Publications: Recent submissions

  • An H I shell-like structure associated with nova V458 Vulpeculae? 
    Nirupam Roy; Kantharia, N. G; Eyres, S. P. S; Anupama, G. C; Bode, M. F; Prabhu, T. P; O'Brien, T. J (Wiley-Blackwell, 2012-11)
    We report the radio detection of a shell-like H i structure in proximity to, and probably associated with, the nova V458 Vul. High spectral resolution observation with the Giant Metrewave Radio Telescope has made it possible ...
  • Jagadish Chandra Bhattacharyya (1930–2012) 
    Prabhu, T. P; Rajan, K. T (Indian Academy of Sciences, 2012-09-25)
    J. C. Bhattacharyya (JCB) passed away in Delhi on 4 June 2012. An eminent instrumentation scientist and observational astronomer, JCB is well known for his discoveries of the atmosphere of Jupiter’s satellite Ganymede ...
  • Omnipresent long-period intensity oscillations in open coronal structures 
    Krishna Prasad, S; Banerjee, D; Van Doorsselaere, T; Singh, J (EDP Sciences, 2012-10)
    Context. Quasi-periodic propagating disturbances in coronal structures have been interpreted as slow magneto-acoustic waves and/or periodic upflows. It is important to understand the nature of these disturbances before ...
  • Oscillations in active region fan loops: observations from EIS/Hinode and AIA/SDO 
    Krishna Prasad, S; Banerjee, D; Singh, J (Springer, 2012-11)
    Active region fan loops in AR 11076 were studied, in search of oscillations, using high cadence spectroscopic observations from Extreme-ultraviolet Imaging Spectrometer (EIS) on board Hinode combined with imaging sequences ...
  • The G–O rule and Waldmeier effect in the variations of the numbers of large and small sunspot groups 
    Javaraiah, J (Springer, 2012-12)
    We have analyzed the combined Greenwich and Solar Optical Observing Network (SOON) sunspot group data during the period of 1874 – 2011 and determined variations in the annual numbers (counts) of the small (maximum area ...
  • Spectral lines behavior of Be I and Na I isoelectronic sequence in Debye plasma environment 
    Chaudhuri, R. K; Chattopadhyay, S; Mahapatra, U. S (American Institute of Physics, 2012-08)
    We report the plasma screening effect on the first ionization potential (IP) and [He]2s/sup2/ (/sup1/S/sup0/)→[He]2s2p/2s3p allowed (/sup1/P/sub1/) and inter-combination transitions (/sup3/P/sub1/) in some selected Be-like ...
  • Reverberation mapping of the Seyfert 1.5 galaxy H 0507+164 
    Jeyakumar, S; Stalin, C. S; Coziol, R (Instituto de Astronomia, UNAM, 2011-10)
    Light curves of the continuum at 5100 °A and Hβ line are obtained from spectroscopic monitoring observations of the Seyfert 1.5 galaxy H 0507+164. The mass of the black hole is calculated based on cross-correlation ...
  • Polarized partial frequency redistribution in subordinate lines. II. Solution of the transfer equation with rayleigh scattering 
    Nagendra, K. N; Sampoorna, M (IOP Publishing, 2012-09-20)
    It is quite common in line formation theory to treat scattering in subordinate lines under the assumption of complete frequency redistribution (CRD). The partial frequency redistribution (PRD) in subordinate lines cannot ...
  • The Gauribidnur acousto optic spectrometer 
    Subramanian, K. R; Ebenezer, E; Sastry, Ch. V (Tata McGraw- Hill, 1994-07)
    An acousto optic spectrometer (ADS) with 30 MHz bandwidth and 1760 channels used for obtain-_ ing the dynamic spectra of solar radio bursts at Gauribidanur is described.
  • Ba+ quadrupole polarizabilities: theory versus experiment 
    Sahoo, B. K; Das, B. P (American Physical Society, 2012-08)
    Three different measurements have been reported for the ground-state quadrupole polarizability in singly ionized barium (Ba+) which disagree with each other. Our calculation of this quantity using the relativistic ...
  • 1D radiative transfer models of 21 and 30 μm emission features in proto-planetary nebulae 
    Muthumariappan, C; Reddy, B. E (Cambridge University Press, 2012-08)
    Spectral energy distributions of six proto-planetary nebulae showing 21 and 30μ features were fit with models obtained from 1D radiative transfer code, taking FeO and MgS respectively are the carriers of the features. ...
  • ɛ Aur in eclipse: Post-AGB primary and disk-shaped secondary 
    Muthumariappan, C; Parthasarathy, M; Jayakumar, K; Appakutty, M (Cambridge University Press, 2012-08)
    We present physical and chemcal properties of the disk in the eclipsing binary system ɛ Aur by solving 2D radiative transfer problem. We also present preliminary results of our high resolution spectroscopic monitoring of ...
  • The solar cycle 
    Javaraiah, J; Rozelot, J. P; Bertello, L (Hindawi Publishing Corporation, 2012-06)
    The Sun provides variable energetic and magnetic field input to the conditions in the heliosphere which directly affect the magnetosphere. In particular, the Sun's variable magnetic fields constitute a rich source for ...
  • Optical and near-infrared survey of the stellar contents associated with the star-forming complex Sh2-252 
    Jose, J; Pandey, A. K; Ogura, K; Samal, M. R; Ojha, D. K; Bhatt, B. C; Chauhan, N; Eswaraiah, C; Mito, H; Kobayashi, N; Yadav, R. K (Wiley-Blackwell, 2012-08)
    We present the analyses of the stellar contents associated with the extended H ii region Sh2-252 using deep optical UBVRI photometry, slit and slitless spectroscopy along with the near-infrared (NIR) data from Two-Micron ...
  • The chemical composition of the post-asymptotic giant branch F supergiant CRL 2688 
    Ishigaki, M. N; Parthasarathy, M; Reddy, B. E; García-Lario, P; Takeda, Y; Aoki, W; García-Hernández, D. A; Manchado, A (Wiley-Blackwell, 2012-09)
    We present an analysis of a high-resolution (R ∼ 50 000) optical spectrum of the central region of the protoplanetary nebula CRL 2688. This object is thought to have recently moved off the asymptotic giant branch (AGB) and ...
  • An unusual very low-mass high-amplitude pre-main sequence periodic variable 
    Rodríguez-Ledesma, M. V; Mundt, R; Ibrahimov, M; Messina, S; Parihar, P. S; Hessman, F. V; Alves de Oliveira, C; Herbst, W (EDP Sciences, 2012-08)
    Aims. We have investigated the nature of the variability of CHS 7797, an unusual periodic variable in the Orion Nebula Cluster. Methods. An extensive I-band photometric data set of CHS 7797 was compiled between 2004−2010 ...
  • Multiwavelength intraday variability of the BL Lacertae S5 0716+714 
    Gupta, A. C; Krichbaum, T. P; Wiita, P. J; Rani, B; Sokolovsky, K. V; Mohan, Prashanth; Mangalam, A; Marchili, N; Fuhrmann, L; Agudo, I; Bach, U; Bachev, R; Böttcher, M; Gabanyi, K. E; Gaur, H; Hawkins, K; Kimeridze, G. N; Kurtanidze, O. M; Kurtanidze, S. O; Lee, C.-U; Liu, X; McBreen, B; Nesci, R; Nestoras, G; Nikolashvili, M. G; Ohlert, J. M; Palma, N; Peneva, S; Pursimo, T; Semkov, E; Strigachev, A; Webb, J. R; Wiesemeyer, H; Zensus, J. A (Wiley-Blackwell, 2012-09)
    We report results from a one-week multiwavelength campaign to monitor the BL Lacertae object (BL Lac) S5 0716+714 (on 2009 December 9–16). Nine ground-based telescopes at widely separated longitudes and one space-based ...
  • Investigation of variable star candidates in the globular cluster NGC 5024 (M53) 
    Bramich, D. M; Arellano Ferro, A; Figuera Jaimes, R; Giridhar, S (Wiley-Blackwell, 2012-08)
    We have performed a careful investigation of the 74 candidate variable stars presented by Safonova & Stalin. For this purpose we used our data base of imaging and light curves from Arellano Ferro et al. We find that two ...
  • The effect of electron scattering redistribution on atomic line polarization 
    Supriya, H. D; Nagendra, K. N; Sampoorna, M; Ravindra, B (Wiley-Blackwell, 2012-09)
    The polarization of spectral lines is generated by the scattering of angularly anisotropic incident radiation field on the atoms in the stellar atmosphere. This atomic scattering polarization is modified by frequency ...
  • Performance of 10.5μm quantum well infrared photodetector for astronomical applications 
    Joseph, Celine; Saxena, A. K (Department of Applied Optics and Photonics, University of Calcutta, 2011)

Search DSpace


Browse

My Account