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  • Evolution of the universe and Earth’s place in cosmos – The 2019 Nobel Prize for Physics 
    Murthy, J (Indian Academy of Sciences, 2019-11-10)
    This was an unusual Nobel prize in that it was awarded ‘for contributions to our understanding of the evolution of the universe and Earth’s place in the cosmos’. This is a broad area which could include almost anything in ...
  • Evolution of the Universe through the Planck epoch 
    Sivaram, C (Springer, 1986-08)
    The problem of the Universe emerging out of the Planck epoch is discussed. It is pointed out that an earlier exponential expansion phase well before the onset of the GUTs phase transition is essential. Such an expansion ...
  • Evolution of time concept in physics and in philosophy 
    Sivaram, C; Arun, K; Kiren, O. V (Science Publications, 2015-07)
    What is ‘time’? This is a question that has perplexed many aphysicist and philosophers alike. The perception of the passage of timeappears ingrained in all biological systems where growth, evolution anddecay of objects, ...
  • Evolution of Viscous Discs 
    Alladin, S. M (Astronomical Society of India, 1975-09)
  • Evolutionary connection between C-rich AGB stars and C-rich central stars of PNe 
    Parthasarathy, M (International Astronomical Union, 1999)
    On the basis of C/O ratios the evolutionary connection between C-rich AGB/post-AGB stars and C-rich central stars of PNe is discussed. The proportion of carbon-rich post-AGB stars is comparable to that of carbon-rich PNe. ...
  • The evolutionary considerations of R CR B stars - Observational approach 
    Kameswara Rao, N (Astronomical Society of India, 1990)
    The properties of the hydrogen-deficient stars called extreme helium stars, R Cr B stars, and hydrogen-deficient carbon stars are briefly examined, emphasizing the R Cr B stars. Luminosities and temperatures, distribution ...
  • The evolutionary status of HD 179821 
    Thévenin, F; Jasniewicz, G; Parthasarathy, M (Kluwer Academic Publishers, 2001-08)
    HD 179821 (IRAS 19114+0002) is classified as a moderately metal-poor ([Fe/H] = - 0.5) post-AGB star of Teff = 5660 K and also as a very massive supergiant of Teff = 6750 K. Recent detailed studies of this star are not able ...
  • Evolutionary Status of Selected Post-AGB Single and Binary Stars in Gaia DR3 
    Parthasarathy, M; Kounkel, Marina; Stassun, Keivan G (IOP Publishing, 2022-08)
    Gaia data is helping to further understand the evolutionary status of post-AGB and related stars. In this paper we present an analysis of Gaia DR3 data of post-AGB stars and post-AGB binaries with accurate parallaxes. Gaia ...
  • Evolutionnary Stages of Stars Exhibiting Nonradial Pulsations 
    Mohan, C (Astronomical Society of India, 1976-09)
  • The evolutton of the magnetic structure of the solar corona with the solar cycle 
    Dikpati, M; Choudhuri, A. R; Venkatakrishnan, P (Astronomical Society of the Pacific, 1996)
  • Evolved A-type stars 
    Parthasarathy, M (Cambridge University Press, 2004-12)
    A review of various types of evolved A stars is presented.
  • An Evolved Disk Surrounding the Massive Main-Sequence Star MWC 297? 
    Manoj, P; Ho, P. T. P; Ohashi, N; Zhang, Q; Hasegawa, T; Chen, H - R; Bhatt, H. C; Ashok, N. M (University of Chicago Press, 2007-10)
    We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the () rotational transitions of 12CO,13CO, and C18O using the Submillimeter ...
  • Exact nonlinear solution for the Hall Alfvén wave in partially ionized plasmas 
    Krishan, V; Furukawa, M; Mahajan, S. M (Cambridge University Press, 2006-12)
    It is shown that the exact nonlinear solution for the Hall–Alfvén waves can be obtained in a uniformly rotating weakly ionized plasma such as those which exist in various types of accretion disks. In addition this piece ...
  • Exact solution of the incompressible Hall magnetohydrodynamics 
    Mahajan, S. M; Krishan, V (Royal Astronomical Society, 2005-05)
    The Alfvén wave is known to be an exact solution of the ideal magnetohydrodynamics (MHD), and this has found use in modelling astrophysical turbulence. In this paper we show that the Hall MHD also submits itself to an exact ...
  • An excess of mid-infrared emission from the type Iax SN 2014dt 
    Fox, O. D; Johansson, J; Kasliwal, M; Andrews, J; Bally, J; Bond, H. E; Boyer, M. L; Gehrz, R. D; Helou, G; Hsiao, E. Y; Masci, F. J; Parthasarathy, M; Smith, N; Tinyanont, S; Van Dyk, S. D (IOP Publishing, 2016-01)
    Supernovae Type Iax ( SNe Iax ) are less energetic and less luminous than typical thermonuclear explosions. A suggested explanation for the observed characteristics of this subclass is a binary progenitor system ...
  • Excitation energies and oscillator strengths of CaI using multireference many-body perturbation theory 
    Majumder, S; Das, B. P; Chaudhuri, R. K (The American Physical Society, 1999-05)
    Excitation energies and oscillator strengths of neutral calcium (Ca I) are calculated through third order using a variant of the multireference many-body perturbation theory, known as the effective valence-shell Hamiltonian ...
  • Excitation Mechanism of O i Lines in Herbig Ae/Be Stars 
    Mathew, v; Manoj, P; Narang, Mayank; Banerjee, D. P. K; Pratheeksha Nayak; Muneer, S; Vig, S; Kumar, S. P; Paul, K. T; Maheswar, G (IOP Publishing, 2018-04-10)
    We have investigated the role of a few prominent excitation mechanisms viz. collisional excitation, recombination, continuum fluorescence, and Lyman beta fluorescence on the O i line spectra in Herbig Ae/Be stars. The aim ...
  • Excitation of high-m tearing modes at the solar flare site 
    Krishan, V (D. Reidel Publishing Company, 1982-10)
    It is shown that high-m drift tearing modes can be excited under the conditions prevalent at the solar flare sites. Since the growth rate of the high-m tearing modes is larger than that for low-m macroscopic tearing modes ...
  • Excitation of Longitudinal Modes in Solar Magnetic Flux Tubes by p-Modes 
    Hasan, S. S; Kalkofen, W (Astronomical Society of the Pacific, 1998)
    This is a continuation of earlier work by Hasan (1997) on the interaction of longitudinal (sausage) waves in a slender flux tube with p-modes in the ambient medium. We use a realistic stratification for the flux tube and ...
  • Excitation of Oscillations in Photospheric Flux Tubes through Buffeting by External Granules 
    Hasan, S. S; Kalkofen, W (The American Astronomical Society, 1999-07)
    We examine the excitation of transverse (kink) and longitudinal (sausage) waves in magnetic flux tubes by granules in the solar photosphere. The investigation is motivated by the interpretation of network oscillations in ...

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