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  • Turbulent magnetic field averages for the Zeeman effect 
    Frisch, H; Sampoorna, M; Nagendra, K. N (Societa Astronomica Italiana, 2007)
    Stokes parameters measured in the Solar atmosphere are in general time or space averages over a magnetic field probability distribution function. Here we show how to write the Zeeman propagation matrix in a reference ...
  • A Turbulent model of the solar granulation 
    Krishan, V (World Scientific Publishing Company, 1995)
    The turbulent nature of the motions on the solar photosphere is being emphasized more and more by the high resolution quality observations. The processes of inverse cascade of energy in a turbulent medium are being ...
  • Turbulent proton heating rate in the solar wind from 5–45 R⊙ 
    Sasikumar Raja, K; Subramanian, P; Ingale, M; Ramesh, R; Maksimovic, Milan (IOP Publishing, 2021-06-20)
    Various remote sensing observations have been used so far to probe the turbulent properties of the solar wind. Using the recently reported density modulation indices that are derived using angular broadening observations ...
  • TW Andromedae - improved elements 
    Rao, P. V; Sarma, M. B. K (Astronomical Society of India, 1997)
  • TW Hya: Spectral Variability, X-Rays, and Accretion Diagnostics 
    Dupree, A. K; Brickhouse, N. S; Cranmer, S. R; Luna, G. J. M; Schneider, E. E; Bessell, M. S; Bonanos, A; Crause, L. A; Lawson, W. A; Mallik, S. V; Schuler, S. C (IOP Publishing, 2012-05-01)
    The nearest accreting T Tauri star, TW Hya was intensively and continuously observed over ~17 days with spectroscopic and photometric measurements from four continents simultaneous with a long segmented exposure using the ...
  • Twenty five years of observational astronomy at the Indian Institute of Astrophysics 
    Mallik, D. C. V (Indian Academy of Sciences, 1998-05)
  • The twin radio galaxy TRG J104454+354055 
    Gopal-Krishna; Joshi, Ravi; Patra, Dusmanta; Yang, Xiaolong; Ho, Luis C; Wiita, Paul J; Omar, Amitesh (Oxford University Press on behalf of Royal Astronomical Society, 2022-07)
    We report observations of a bright dumb-bell system of galaxies (z = 0.162) with the upgraded Giant Metrewave Radio Telescope (uGMRT), which show that each member of this gravitationally bound pair of galaxies hosts bipolar ...
  • Twin Telescope observations of the Sun at Kodaikanal Observatory 
    Singh, J; Ravindra, B (Astronomical Society of India, 2012-03)
    We report the design, fabrication and installation of a ‘Twin Telescope’ at Kodaikanal Observatory intended to augment the ongoing synoptic observations of the Sun that have been carried out since 1904. The telescope uses ...
  • Twisted magnetic fluxtubes in the sun 
    Sen, Samrat (Indian Institute of Astrophysics, 2020-01)
    The study of magnetic fluxtubes is a very important aspect as it plays an important role in several astrophysical phenomena in the solar atmosphere. Thus, it is very important to understand the properties and structures ...
  • Twisted surge of 1981 December 25 
    Verma, V. K (Astronomical Society of India, 1983-03)
    Photographic observations and the morphological behaviour of the surge prominence of importance class 1 recorded with the 0.7 A passband H-alpha filter on 1981 December 25 have been described. The surge was recorded both ...
  • Twisting/Swirling Motions during a Prominence Eruption as Seen from SDO/AIA 
    Pant, V; Datta, A; Banerjee, D; Chandrashekhar, K; Ray, S (IOP Publishing, 2018-06-10)
    A quiescent prominence was observed at the northwest limb of the Sun using different channels of the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. We report and analyze twisting/swirling motions ...
  • Twistors, torsion and quantization of space-time 
    Sabbata, V; Sivaram, C (Springer, 1996-04)
    The analogies between twistors and torsion are developed. TheSL(2,C) group of transformations is used to suggest a unified link between the approaches. The role of space-time defects in the quantization of space-time is ...
  • A two band far-infrared photometer with bolometer arrays 
    Verma, R. P; Rengarajan, T. N; Ghosh, S. K (Astronomical Society of India, 1993)
    A new two band photometer for the Tata Institute of Fundamental Research (TIFR) 1m balloon-borne telescope is described. The detector system consists of two arrays (of six detectors each) of liquid He-3 cooled bolometers. ...
  • A two channel high speed photometer for lunar occultation studies in the near - IR 
    Mondal, S; Chandrasekhar, T; Ashok, N. M; Kikani, P. K (Astronomical Society of India, 1999)
    Lunar occultaion in the near infrared has been demonstrated by the PRL group to be an effective method of determining the angular size (in milliarcsecond range)and accurate effective temperature of red giants, supergiants ...
  • Two Colour Photoelectric observations of the eclipsing variable UW Canis Majoris 
    Doss, A. T (Kodaikanal Observatory, 1967-01)
    Photoelectric light curves of the eclipsing binary UW Canis Majoris have been obtained in the blue and yellow. A new ephemeris is given for the system. The depth of the primary minimum is about 0/supm/.45 in B and 0/supm/.47 ...
  • The two components in the distribution of sunspot groups with respect to their maximum areas 
    Gokhale, M. H; Sivaraman, K. R (Springer, 1981-12)
    From an analysis of the distribution of sunspot groups with respect to their maximum areas we find that this distribution consists of two distinct components. One component contributes to spot groups of all possible values ...
  • The two components of the solar activity cycle as a consequence of the shock transition model of the solar magnetic cycle 
    Gokhale, M. H (Indian Institute of Astrophysics, 1979-11)
    Justification is given for comparing the consequences of the shock transition model of the solar magnetic cycle with important observed properties of the solar activity cycle without waiting for the basic postulates of the ...
  • Two decades of dust evolution in SN 2005af through JWST, spitzer, and chemical modeling 
    Sarangi, Arkaprabha; Zsiros, Szanna; Szalai, Tamas; Martinez, Laureano; Shahbandeh, M; Fox, O. D; Van Dyk, S. D; Filippenko, A. V; Bersten, M. C; de Looze, Ilse; Ashall, Chris; Temim, Tea; Jencson, Jacob E; Rest, Armin; Milisavljevic, D; Dessart, Luc; Dwek, Eli; Smith, Nathan; Tinyanont, S; Brink, Thomas G; Zheng, W; Clayton, G. C; Andrews, Jennifer E (American Astronomical Society, 2025-11-01)
    The evolution of dust in core-collapse supernovae (SNe), in general, is poorly constrained owing to a lack of infrared observations a few years after explosion. Most theories of dust formation in SNe heavily rely only on ...
  • Two Kinds of BL LAC type Objects? 
    Venugopal, V. R (Astronomical Society of India, 1976-09)
  • Two longitudinal zones of apparent inhibition of sunspots on the solar disc 
    Chidambara Ayyar, P. R (Government Observatory, Madras, 1932-07-26)

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