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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Adaptive dynamics on circle maps 
    Sinha, S (Elsevier, 1994-04)
    We have studied a model of Sinha and Biswas of adaptive dynamics on a lattice of circle maps. The model reveals two remarkable features: First, even when the individual local elements are regular, the adaptive mechanisms ...
  • Adaptive friend of friends algorithm for identifying gravitationally bound cosmological structures 
    Gupta, Prateek; Paul, Surajit (American Physical Society, 2023-11-15)
    The Universe at the present epoch is found to be a network of matter over dense and under dense regions. Usually, the over dense regions are dominated by the dark-matter (DM) filaments where massive gravitationally bound ...
  • Adaptive optics and its applications 
    Mohan, D; Mishra, S. K; Saha, S. K (National Institute of Science Communication and Information Resources, 2005-06)
    The adaptive optics (AO) system combines technologies that enable corrections in real time for the deleterious effects of the atmosphere allowing terrestrial telescopes to achieve their near diffraction-limit. Such a system ...
  • Additional calibration of the ultraviolet imaging telescope on board AstroSat 
    Tandon, S. N; Postma, J; Joseph, P; Devaraj, A; Subramaniam, A; Subramaniam, I. V; George, K; Ghosh, S. K; Girish, V; Hutchings, J. B; Kamath, P. U; Kathiravan, S; Kumar, A; Lancelo, J. P; Leahy, D; Mahesh, P. K; Mohan, R; Nagabhushana, S; Pati, A. K; Kameswara Rao, N; Sankarasubramanian, K; Sriram, S; Stalin, C. S (IOP Publishing, 2020-04)
    Results of the initial calibration of the Ultra-Violet Imaging Telescope (UVIT) were reported earlier by Tandon et al. The results reported earlier were based on the ground calibration as well as the first observations in ...
  • The Aditya-L1 mission of ISRO 
    Tripathi, Durgesh; Chakrabarty, D; Nandi, A; Prasad, B. R; Ramaprakash, A. N; Shaji, Nigar; Sankarasubramanian, K; Satheesh Thampi, R; Yadav, V. K (Cambridge University Press on behalf of International Astronomical Union, 2023)
    The Aditya-L1 is the first space-based solar observatory of the Indian Space Research Organization (ISRO). The spacecraft will carry seven payloads providing uninterrupted observations of the Sun from the first Lagrangian ...
  • Advanced Methods for Improving the Efficiency of a Shack Hartmann Wavefront Sensor 
    Vyas, A; Roopashree, M. B; Prasad, B. R (InTech, 2012-01)
  • Advances in spectral classification 
    Giridhar, S (Astronomical Society of India, 2010-03)
    In this article we give an overview of the developments in the field of spectral classification, its continued importance in the fields of stellar and galactic evolution. The extension of MK system to cool stars as well ...
  • Aerosol optical properties retrieved using Skyradiometer at Hanle in western Himalayas 
    Neeharika, V; Bagare, S. P; Shantikumar, N. S; Rajendra, B. S (Elsevier B. V., 2010-01)
    A Skyradiometer was installed at Hanle in Ladakh, in October 2007 as a part of the site characterization program for the proposed National Large Solar Telescope project. Aerosol optical depth (AOD), single scattering albedo ...
  • 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 ...
  • After the fall: from Adam and Eve to apples and elevators 
    Vishveshwara, C. V (Inter-University Center for Astronomy and Astrophysics, 1998)
  • The afterglow and the host galaxy of GRB 011211 
    Jakobsson, P; Hjorth, J; Fynbo, J. P. U; Gorosabel, J; Pedersen, K; Burud, I; Levan, A; Kouveliotou, C; Tanvir, N; Fruchter, A; Rhoads, J; Grav, T; Hansen, M. W; Michelsen, R; Jensen, B. L; Pedersen, H; Thomsen, B; Weidinger, M; Bhargavi, S. G; Cowsik, R; Pandey, S. B (The European Southern Observatory, 2003-09)
    We present optical, near-infrared, and X-ray observations of the optical afterglow (OA) of the X-ray rich, long-duration gamma-ray burst GRB 011211. Hubble Space Telescope (HST) data obtained 14, 26, 32, and 59 days after ...
  • Age aspects of habitability 
    Safonova, M; Murthy, J; Shchekinov, Yu. A (Cambridge University Press, 2016-04)
    A ‘habitable zone’ of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host ...
  • Age Distribution of Exoplanet Host Stars: Chemical and Kinematic Age Proxies from GAIA DR3 
    Swastik, C; Banyal, R. K; Narang, Mayank; Unni, Athira; Banerjee, Bihan; Manoj, P; Sivarani, T (American Astronomical Society, 2023-09-01)
    The GAIA space mission is impacting astronomy in many significant ways by providing a uniform, homogeneous, and precise data set for over 1 billion stars and other celestial objects in the Milky Way and beyond. Exoplanet ...
  • Age Sequence in Small Clusters Associated with Bright-Rimmed Clouds 
    Ogura, K; Chauhan, N; Pandey, A. K; Bhatt, B. C; Ojha, D; Itoh, Y (Astronomical Society of Japan, 2007-02)
    Bright-rimmed clouds (BRCs) found in HII regions are probable sites of triggered star formation due to compression by ionization/shock fronts, and it is hypothesized that star formation proceeds from the exciting star(s) ...
  • The AGN and gas disk in the low surface brightness galaxy PGC045080 
    Das, M; Kantharia, N; Ramya, S; Prabhu, T. P; McGaugh, S. S; Vogel, S. N (Blackwell Publishing, 2007-07)
    We present radio observations and optical spectroscopy of the giant low surface brightness (LSB) galaxy PGC 045080 (or 1300+0144). PGC 045080 is a moderately distant galaxy having a highly inclined optical disc and massive ...
  • Alfred Wegener –From Continental Drift to Plate Tectonics 
    Saigeetha, A. J; Banyal, R. K (Indian Academy of Sciences, 2005-06)
  • Alfven waves in a gravitational field with flows 
    Satya Narayanan, A; Kathiravan, C; Ramesh, R (Cambridge University Press, 2009-03)
    The gravitational stratification effect on magnetohydrodynamic waves at a single interface in the solar atmosphere has been studied in the penumbral region of the sunspot recently. The existence of slow and fast magneto ...
  • The Alfven-Carlquist double-layer theory of solar flares 
    Hasan, S. S; Ter Haar, D (Kluwer Academic Publishers, 1978-06)
    We use the Vlasov equations for ions and electrons to develop a theory of a double layer in which there are both free and trapped electrons and ions. We find the equations which replace the Langmuir condition and the Bohm ...
  • Alfvén vortices in nonuniform dusty magnetoplasmas 
    Shukla, P. K; Varma, R. K; Krishan, V; Mckenzie, J. F (The American Physical Society, 1993-01)
    The Alfvén waves are shown to be linearly coupled with finite-frequency convective cell modes in a nonuniform cold dusty magnetoplasma. The dynamics of weakly interacting finite-amplitude electromagnetic oscillations is ...
  • Alfvén-like mode in partially ionized solar atmosphere 
    Singh, K. A. P; Krishan, V (Elsevier, 2010-01)
    The partially ionized part of the solar atmosphere is investigated within the framework of a single-fluid magnetohydrodynamic (MHD) description including the non-ideal effects such as the Hall effect and the ambipolar ...

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