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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • A physically-motivated perspective of Fanaroff–Riley classification of radio galaxies 
    Gopal-Krishna; Wiita, Paul J; Joshi, Ravi; Patra, Dusmanta (Indian Academy of Sciences, 2023-06)
    A small subset of extragalactic double radio sources, termed HYbrid MOrpholgy Radio Sources (HYMORS), is distinguished by a very unusual, hybrid morphology in terms of Fanaroff–Riley (FR) classification. In HYMORS, one ...
  • Physics and Chemistry of Radiation Driven Cloud Evolution. [C II] Kinematics of IC 59, and IC 63 
    Caputo, Miranda; Archana Soam; Andersson, B-G; Dennis, Remy; Chambers, Ed; Gusten, Rolf; Knee, Lewis B. G; Stutzki, Jurgen (American Astronomical Society, 2023-06-20)
    We used high-resolution [C II] 158 μm mapping of two nebulae IC 59 and IC 63 from SOFIA/upGREAT in conjunction with ancillary data of the gas, dust, and polarization to probe the kinematics, structure, and magnetic properties ...
  • Physics and observations of tidal disruption events 
    Mangalam, A; Mageshwaran, T (Societe Royale des Sciences de Liege, 2018-04)
    We describe a model of tidal disruption events (TDEs) with input physical parameters that include the black hole (BH) mass M•, the specific orbital energy E, the angular momentum J, the star mass M? and radius R?. We ...
  • Physics of melts 
    Gaur, V. K (Indian Academy of Sciences, 1997-11-10)
  • Physics of Photospheric Magnetic Field 
    Van Ballegooijen, A. A; Hasan, S. S (Astronomical Society of the Pacific, 2003)
  • Physics of the phase changes of Be stars 
    Ghosh, K. K (International Astronomical Union, 1994)
    Based on Spectrosopic observations of more than 100 Be stars, we present the reuslts of the phase changes of Be stars.
  • Physics of the Solar Cycle: New Views 
    Hiremath, K. M (Balkan, Black Sea and Caspian Sea, 2010-11)
    Presently there are two schools of thought viz., turbulent dynamo and MHD oscillation mechanisms that explain the solar cycle and activity phenomena. Both the mechanisms are critically examined and fundamental difficulties ...
  • Pi gruis - molecular identifications and spectral classification 
    Murty, P. S (D.Reidel Publishing Co.,, 1983-08)
    Identifications of the molecular absorption features in the visible spectrum of the S star Pi Gruis are presented. Moderate dispersion spectrum of π/sup1 Gru covering the region 5800-7300 Å, demonstrates the presence of a ...
  • Pixel size and pitch measurements of liquid crystal 
    Banyal, R. K; Prasad, B. R (Indian Academy of Sciences, 2005-08)
    We present a simple technique for the determination of pixel size and pitch of liquid crystal (LC) based spatial light modulator (SLM). The proposed method is based on optical diffraction from pixelated LC panel that has ...
  • The planck length as a cosmological constraint 
    Sivaram, C (Springer, 1986-11)
    Any attempt at unification of gravity with quantum physics inevitably leads to the Planck length, usually interpreted as defining the distance scale at which quantum corrections to general relativity are expected to become ...
  • Planckian pre big bang phase of the Universe 
    Sivaram, C; Arun, K; Rebecca, L (Springer, 2020-01)
    The standard model of cosmology, although very successful, has problems with the very initial phase, such as the existence of a singularity when the density and curvature becomes infinite. In this work we propose a possible ...
  • Planet nine, dark matter and MOND 
    Sivaram, C; Arun, K; Kiren, O. V (Springer, 2016-07)
    Here we propose the possibility that the recently postulated Neptune-sized planet with an orbital period of 15,000 years could be a gravitationally condensed dark matter (DM) object. The observed mass of Planet Nine fits ...
  • Planetary dynamos 
    Gaur, V. K (Springer Netherlands, 2008)
    The article begins with a reference to the first rational approaches to explaining the earth’s magnetic field notably Elsasser’s application of magneto-hydrodynamics, followed by brief outlines of the characteristics of ...
  • Planetary heat flow limits on monopole and axion fluxes 
    Sivaram, C (D. Reidel Publishing Co., 1987-02)
    Recent improvements in the quantitative estimates of the observed heat flow from planetary objects of the solar system may be used to put rather stringent limits on any background monopole flux. The axion flux from the ...
  • Planetary nebulae - Origin and evolution 
    Mallik, D. C. V (Astronomical Society of Australia, 1991)
    The review describes some of the progress made in observations and their interpretation, particularly in the context of the evolution of the nebulae and the central stars. It includes a discussion on the improved determinations ...
  • Planetary nebulae and nitrogen enrichment in the galaxy 
    Mallik, D. C. V (Geneva Observatory, 1978)
    The extent of nitrogen enrichment of the interstellar gas by planetary-nebula formation is evaluated, and the nitrogen and oxygen abundance gradients in the disk of the Galaxy are derived on the basis of a simple model for ...
  • Planetary nebulae with UVIT II. Revelations from far-UV vision of Butterfly nebula NGC 6302 
    Kameswara Rao, N; De Marco, O; Sriram, K; Murthy, J; Ray, A; Sutaria, F. K; Mohan, Rekhesh (EDP Sciences, 2018-12)
    The high excitation planetary nebula, NGC 6302, has been imaged in two far-ultraviolet (FUV) filters, F169M (Sapphire; λeff: 1608 Å)and F172M (Silica; λeff: 1717 Å) and two near-UV (NUV) filters, N219M (B15; λeff: 2196 Å) ...
  • Planetary nebulae with UVIT: A progress report 
    Kameswara Rao, N; Sutaria, F; Murthy, J; Ray, A; Pandey, G (Indian Academy of Sciences, 2021-10)
    The spectral region between 1250–3000 A contains important spectral lines to understand the ˚ morphological structures and evolution of planetary nebulae. This is the region sampled by UVIT through various filter bands ...
  • Planetary nebulae with UVIT: Far ultra-violet halo around the Bow Tie nebula (NGC 40) 
    Kameswara Rao, N; Sutaria, F. K; Murthy, J; Sriram, K; Mohan, Rekhesh; Ray, A (EDP Sciences, 2018-01)
    Context. NGC 40 is a planetary nebula with diffuse X-ray emission, suggesting an interaction of the high-speed wind from WC8 cen- tral star (CS) with the nebula. It shows strong C IV 1550 Å emission that cannot be ...
  • Planets in the early Universe 
    Shchekinov, Y. A; Safonova, M; Murthy, J (Springer, 2013-07)
    Several planets have recently been discovered around stars that are old and metal-poor, implying that these planets are also old, formed in the early Universe together with their hosts. The canonical theory suggests that ...

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