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  • Anomalous nature of outbursts of black hole candidate 4U 1630-472 
    Chatterjee, Kaushik; Debnath, Dipak; Bhowmick, Riya; Nath, Sujoy Kumar; Chatterjee, Debjit (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    The Galactic black hole candidate (BHC) 4U 1630−472 has gone through several outbursts (13 to be particular) in the last two and a half decades starting from the RXTE era till date. Like the outbursts of other transient ...
  • Anomalous reddening law in the galactic giant H II region NGC 3603 
    Pandey, A. K; Ogura, K (Astronomical Society of India, 1998)
  • Anomalous redshifts of QSOS 
    Narlikar, J. V; Das, P. K (International Astronomical Union, 1980)
  • Anomalous redshifts of quasi-stellar objects 
    Narlikar, J. V; Das, P. K (American Astronomical Society, 1980-09)
    This paper is based on the assumption that the observational evidence to date does point to the possibility that high-redshift quasars are physically associated with low-redshift galaxies. It is first argued that the excess ...
  • Anomalous surface wave dispersion and the enigma of “continental-like” structure for the Bay of Bengal 
    Mitra, S; Priestley, K; Acton, C; Gaur, V. K (Elsevier B.V., 2011-11)
    Brune and Singh (1986) showed that fundamental mode surface wave group velocities measured across the Bay of Bengal were inconsistent with velocity models of a normal oceanic crust overlain by sediments. They attributed ...
  • Anomalously high apparent abundances of singly ionized helium in the Galactic H II region W3A 
    Roelfsema, P. R; Goss, W. M; Mallik, D. C. V (University of Chicago Press, 1992-07)
    The distribution of single ionized helium Y(+) in the Galactic H II region W3A has been determined using high-resolution observations of radio recombination lines in the 76, 92, and 110 alpha lines. The angular resolutions ...
  • Another illustration of Einstein's theory 
    Deighton, Thos. (Astronomical Society of India, 1918)
  • Antimatter in Cosmic Rays 
    Daniel, R. R; Stephens, S. A (Astronomical Society of India, 1980-06)
    We have briefly reviewed the available information on the antimatter content in the universe deduced from astronomical observations and examined some of the theories relating to symmetric cosmology, in order to understand ...
  • Antiproton production in cosmic rays: A comparison of photino and quark models 
    Sivaram, C; Krishnan, V; de Sabbata, V; Yellappa, Y (International Cosmic Ray, 1990)
    The rise of energy of a pp interaction is accompanied by increase in multiplicity with corresponding rise in fraction of secondary particles produced in propagation of cosmic rays through the interstellar medium. A comparison ...
  • Antiquity of the vedic calendar 
    Abhyankar, K. D (Astronomical Society of India, 1998-03)
    Taking guidance from Vedanga jyotis, it is found that in ancient India the sacrificial year started near the winter solstice. As the position of the winter solstice retrogrades by 1 degree in about 71 years due to the ...
  • Anyons and torsion 
    de Sabbata, V; Sivaram, C (Italian Physical Society, 1992-10)
    We consider, in analogy to electromagnetic anyons as charge magnetic-flux composite, the gravitational anyons as mass-spin (energy-spin) composite. We show that torsion interaction has many features in common with the ...
  • AOTF-based spectro-polarimeter for observing Earth as an exoplanet 
    Jaiswal, Bhavesh; Singh, Swapnil; Jain, Anand; Sankarasubramanian, K; Nandi, Anuj (SPIE-Society of Photo-Optical Instrumentation Engineers, 2022-10)
    Earth is the only known habitable planet and it serves as a testbed to benchmark the observations of temperate and more Earth-like exoplanets. It is required to observe the diskintegrated signatures of Earth for a large ...
  • Aperture synthesis : methods and applications to optical astronomy 
    Saha, S. K (Springer, 2011)
    Over the years long baseline optical interferometry has slowly gained in importance and today it is a powerful tool. This timely book sets out to highlight the basic principles of long baseline optical interferometry. The ...
  • Aperture Synthesis at Optical Wavelengths 
    Saha, S. K (Department of Applied Optics and photonics, University of Calcutta, 2011)
    Optical stellar interferometers have demonstrated milli-arcsecond resolution with few apertures spaced tens of meters apart. Results from the area of stellar angular diameters with implications for emergent fluxes, ...
  • Aperture synthesis in optical astronomy; the current status 
    Saha, S. K (Invertis, Inc, 2007)
    A milestone in observational astronomy was achieved when the interferometric fringes of Lyrae (Vega) in the visible band were obtained in July 1974, by A. Labeyrie from an interferometer, called Interferometre a deux ...
  • Appadvedula Lakshmi Narayan (1887 - 1973) Foundation Fellow 
    Ramakrishna Rao, I (Indian National Science Academy, 1983-08)
  • The apparent effect of planets on the distribution of prominences 
    Royds, T; Sitarama Ayyar, S (Indian Institute of Astrophysics, Bangalore, 1913-11-15)
  • An apparent influence of the earth on solar prominences 
    Evershed, John; Chidambara Ayyar, P. R (Government Observatory, Madras, 1921-06-19)
  • The apparent tripling of certain lines in arc spectra 
    Royds, T (The Royal Society, 1925-02)
  • Appearance versus disappearance of broad absorption line troughs in quasars 
    Mishra, Sapna; Vivek, M; Chand, Hum; Joshi, Ravi (Oxford University Press on behalf of the Royal Astronomical Society, 2021-07)
    We present a new set of 84 broad absorption line (BAL) quasars (1.7 < zem < 4.4) exhibiting an appearance of C IV BAL troughs over 0.3–4.8 rest-frame years by comparing the Sloan Digital Sky Survey Data Release (SDSSDR)-7, ...

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