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  • Evolution of latitude zonal structure of the large-scale magnetic field in solar cycles 
    Makarov, V. I; Sivaraman, K. R (Springer, 1989-03)
    The latitude zonal component of the large-scale solar magnetic field is analyzed using H-alpha charts for the 1905-1982 period, and the poleward migration of prominences is used to calculate the time of reversal of the ...
  • Evolution of Lithium Abundance in Pop I Giants 
    Mallik, S. G. V (International Astronomical Union, 2000)
    Recent observations of cool giants have shown that there exists a large range in their lithium abundances even for apparently similar stars. In order to explore whether this large spread could be interpreted in terms of ...
  • Evolution of lithium in low-mass giants: an observational perspective 
    Bharat Kumar, Yerra; Reddy, B. E (Indian Academy of Sciences, 2020-12)
    The overabundance of lithium in low-mass red giants has been a topic of interest for over four decades. Low-mass stars are expected to destroy lithium gradually throughout their lifetimes. Against this expectation, about ...
  • Evolution of low mass stars : AGB to PN 
    Parthasarathy, M (Astronomical Society of India, 1998)
  • Evolution of low-frequency quasi-periodic oscillations in GX 339-4 during its 2021 outburst using AstroSat data 
    Mondal, Santanu; Salgundi, Anirudh; Chatterjee, Debjit; Jana, Arghajit; Chang, H. K; Naik, Sachindra (Oxford University Press on behalf of Royal Astronomical Society, 2023-12)
    The black hole X-ray binary GX 339-4 showed an X-ray outburst during 2021. The AstroSat captured this outburst when the source entered into the intermediate flux state while the count rate was declining. The source showed ...
  • Evolution of magnetic field twist and tilt in active region NOAA 10930 
    Ravindra, B; Venkatakrishnan, P; Tiwari, S. K (World Scientific Publishing Company, 2010)
    Magnetic twist of the active region has been measured over a decade using photospheric vector field data, chromospheric Hα data, and coronal loop data. The twist and tilt of the active regions have been measured at the ...
  • Evolution of magnetic fields in the solar atmosphere 
    Ravindra, B (Astronomical Society of India, 2005-09)
    The Sun affects the terrestrial climate and weather as well as near Earth space by its high energy radiation and particle emissions. It is now becoming clear that the solar magnetic field, which controls all the physical ...
  • Evolution of metals and dust in the universe 
    Khare, P; Kulkarni, V. P; Lauroesch, L. T; Fall, S. M; York, D. G; Welty, D. E; Crotts, A. P. S; Truran, J. W; Nakamura, O (Astronomical Society of India, 2005-06)
    With the aim of determining the evolution of metals and dust in the universe, we have observed 8 Damped Lyman-alpha Absorbers (DLAs) with the Multiple Mirror Telescope and the Hubble Space Telescope at 0:1 < z < 1:5, ...
  • Evolution of Optical Spectrum of SN 1987A 
    Kameswara Rao, N (Indian Institute of Astrophysics, 1988)
    The initial reaction to the spectroscopic behaviour of SN 1987A was that it is a very untypical SN II but after a year, it is said that it is not peculiar after all. Only it went through various stages very fast and that ...
  • Evolution of primordial dark matter planets in the early Universe 
    Kiren, O. V; Arun, K; Sivarani, C (Elsevier B. V, 2021-08-15)
    In a recent paper we had discussed possibility of DM at high redshifts forming primordial planets composed entirely of DM to be oneof the reasons for not detecting DM (as the flux of ambient DM particles would be consequently ...
  • Evolution of research in different astronomies in India 
    Bhattacharyya, J. C (The Council of Scientific and Industrial Research, 1986-10)
    The evolution of astronomical studies is reviewed with special reference to important achievements on Indian soil since the introduction of telescopic observations in the early seventeenth century. Important activities ...
  • Evolution of Spinning and Braiding Helicity Fluxes in Solar Active Region NOAA 10930 
    Ravindra, B; Yoshimura, K; Dasso, S (IOP Publishing, 2011-12-10)
    The line-of-sight magnetograms from Solar Optical Telescope Narrowband Filter Imager observations of NOAA Active Region 10930 have been used to study the evolution of spinning and braiding helicities over a period of five ...
  • Evolution of Stars and Metals in Damped Lyman-alpha Galaxies 
    Kulkarni, V. P (Astronomical Society of India, 2003)
    A unique tool to investigate distant young galaxies is to study the absorption lines they produce in the spectra of background quasars. The damped Lymanalpha (DLA) quasar absorption line systems allow us to empirically ...
  • Evolution of starspot regions in DM UMa 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V; Hall, D. S; Henry, G. W (Kluwer Academic Publishers, 1985-10)
    B andV photometry of DM UMa obtained between January, 1980 and June, 1984 is presented. Analysis yields a mean photometric period 7d.478±0d.010, compared to the known oribital period of 7d.492±0d.009. Light curves obtained ...
  • Evolution of Sunspots Seen in Molecular Lines - Part Two 
    Sinha, K; Tripathi, B. M (Astronomical Society of India, 1991)
  • Evolution of sunspots seen in molecular lines. I 
    Sinha, K; Tripathi, B. M (Astronomical Society of India, 1991)
    Equivalent-width calculations are conducted for lines of C2, MgH, and TiO relevant to photospheric and sunspot model atmospheres to determine the effects of magnetic field strength on line intensities. Sunspot models with ...
  • Evolution of the active region NOAA 10570 associated with the flares 
    Sundararaman, K; Ramesh, K. B; Selvendran, R (Anita Publications, 2004-12)
    The structure and evolution of the photospheric magnetic fields observed in the active region NOAA 10570 are analyzed using Kodaikanal photoheliogram and spectroheliogram data. It is attempted to evaluate the shear angle ...
  • Evolution of the helical prominence of December 15, 1992 
    Uddin, W; Gaur, V. P; Pande, M. C (Astronomical Society of India, 1995)
    Following Vrsnak (1990), the observations of an eruptive prominence are analysed. Time evolution of height and velocity of the ascending prominence are measured. The prominence manifested helical structure and many knots. ...
  • Evolution of the Hub-filament Structures in IC 5146 in the Context of the Energy Balance of Gravity, Turbulence, and Magnetic Field 
    Chung, Eun Jung; Lee, Chang Won; Kwon, Woojin; Yoo, Hyunju; Archana Soam; Cho, Jungyeon (American Astronomical Society, 2022-11-01)
    We present the results of 850 μm polarization and C18O (3 − 2) line observations toward the western hub-filament structure (W-HFS) of the dark Streamer in IC 5146 using the James Clerk Maxwell Telescope SCUBA-2/POL-2 and ...
  • Evolution of the magnetic field in accreting neutron stars 
    Konar, S (Astronomical Society of India, 2000)
    There has been sufficient observational indication suggesting a causal connection between the binary history of neutron stars and the evolution of their magnetic field. In particular, it is believed that the generation of ...

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