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  • On the usefulness of existing solar wind models for pulsar timing corrections 
    Tiburzi, C; Verbiest, J. P. W; Shaifullah, G. M; Janssen, G. H; Anderson, J. M; Horneffer, A; Kunsemoller, J; Ostowski, S; Donner, J. Y; Kramer, M; Anshu Kumari; Porayko, N. K; Zucca, P; Ciardi, B; Dettmar, R.J; Griebmeier, J.M; Hoeft, M; Serylak, M (Oxford University Press on behalf of the Royal Astronomical Society, 2019-07)
    Dispersive delays due to the solar wind introduce excess noise in high-precision pulsar timing experiments, and must be removed in order to achieve the accuracy needed to detect, e.g., low-frequency gravitational waves. ...
  • On the Variability of the Solar Mean Magnetic Field: Contributions from Various Magnetic Features on the Surface of the Sun 
    Souvik Bose; Nagaraju, K (IOP Publishing, 2018-07-20)
    The solar mean magnetic field (SMMF) is referred to as the disk-averaged line-of-sight (LOS) magnetic field that also reflects the polarity imbalance of the magnetic field on the Sun. The origin of the SMMF has been debated ...
  • On the Variation in the Volumetric Evolution of CMEs from the Inner to Outer Corona 
    Majumdar, Satabdwa; Patel, Ritesh; Pant, Vaibhav (American Astronomical Society, 2022-04-10)
    Some of the major challenges faced in understanding the early evolution of coronal mass ejections (CMEs) are due to the limited observations in the inner corona (<3 R⊙) and the plane-of-sky measurements. In this work, we ...
  • On the visual light curve of RT. Eridani 
    Bappu, M. K. V (Indian Academy of Sciences, 1946-07)
  • On the Weakening of the Chromospheric Magnetic Field in Active Regions 
    Nagaraju, K; Sankarasubramanian, K; Rangarajan, K. E (The American Astronomical Society, 2008-05)
    Simultaneous measurement of line-of-sight (LOS) magnetic and velocity fields at the photosphere and chromosphere are presented. The Fe i line at λ6569 and Hα at λ6563 are used for deriving the physical parameters at ...
  • On the widths and ratios of MgX 609.79 and 624.94 Å lines in polar off-limb regions 
    O`Shea, E; Banerjee, D; Doyle, J. G (EDP Science, 2005-06)
    Using measurements of MgX 609.78 and 624.94 Å lines from the Coronal Diagnostic Spectrometer (CDS) on board SOHO, we seek to examine the variation of line width and line ratio in regions far off-limb at the Northern pole ...
  • On turbulent fragmentation and the origin of the stellar IMF 
    Anathpindika, S (Elsevier, 2013-01)
    Two varieties of the universal stellar initial mass function (IMF) viz., the Kroupa and the Chabrier IMF, have emerged over the last decade to explain the observed distribution of stellar masses. The possibility of the ...
  • On two seventeenth century Persian paintings depicting comets or fireballs 
    Kapoor, R. C (National Astronomical Research Institute of Thailand, 2019-08)
    In the Theodore M. Davis Collection of the Metropolitan Museum of Art in New York there are two seventeenth century Persian paintings by Muhammad Zaman and Ali Quli Jubbahdar that depict comets or fireballs. From the ...
  • On two Seventeenth century Persian paintings depicting comets or fireballs: a correction 
    Kapoor, R. C (National Astronomical Research Institute of Thailand, 2020-12)
    In a recent issue of the Journal of Astronomical History and Heritage I looked into two seventeenth century Persian paintings depicting tailed objects (comets or possibly fireballs) in the sky (Kapoor, 2019). One of these, ...
  • On type II solar radio bursts 
    Thejappa, G (Elsevier, 1986)
    The proposed model for the generation mechanism of type II solar radio bursts is based on the fact that a small fraction of ions is reflected from the supercritical shock front and tend to evolve into a 'ring' in the ...
  • On Zero-Point Fluctuations, the Cosmological Constant, and the Graviton Mass 
    Sivaram, C (The American Astronomical Society, 1999-08)
    Recently attempts have been made to link vacuum zero-point fields (ZPF), with a nonzero cosmological constant (Lambda), which is now treated as a cosmological free variable to be determined by observations. In another ...
  • Onboard Automated CME Detection Algorithm for the Visible Emission Line Coronagraph on ADITYA-L1 
    Ritesh Patel; Amareswari, K; Pant, v; Banerjee, D; Sankarasubramanian, K; Amit Kumar (Springer, 2018-07)
    ADITYA-L1 is India’s first space mission to study the Sun from the Lagrange 1 position. The Visible Emission Line Coronagraph (VELC) is one of seven payloads on the ADITYA-L1 mission, which is scheduled to be launched ...
  • Once in a blue moon: detection of bluing' during debris transits in the white dwarf WD 1145+017 
    Hallakoun, N; Xu, S; Maoz, D; Marsh, T. R; Ivanov, V. D; Dhillon, V. S; Bours, M. C. P; Parsons, S. G; Kerry, P; Sharma, S; Su, K; Sridharan, R|; Pravec, P; Kusnirak, P; Kucakova, H; Armstrong, J. D; Arnold, C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    The first transiting planetesimal orbiting a white dwarf was recently detected in K2 data of WD 1145+017 and has been followed up intensively. The multiple, long and variable transits suggest the transiting objects are ...
  • One dimensional prominence model 
    Nagabhushana, B. S (The European Southern Observatory, 1998-05)
    Based on reasonable assumptions and mathematical approximations a one dimensional, analytical model for solar quiescent prominences is constructed, which is in both magneto-hydrostatic and thermal equilibrium. Thermal ...
  • One more explanation of superluminal motion 
    Krishan, V (Indian Academy Sciences, 1988-12)
    A model in which stimulated Raman scattering produces superluminal motion in extragalactic radio sources is examined. The scattering medium studied is a plasma whose position, density, and temperature determine the rate ...
  • One year of monitoring of the 2006 outburst in optical and low radio frequencies 
    Anupama, G. C (Astronomical Society of the Pacific, 2008-12)
    The evolution of the optical spectrum of RS Ophiuchi was monitored beginning 1 day since the 2006 outburst discovery to over a year after the outburst. The evolution of the spectrum is found to be similar to previous ...
  • One year of monitoring of the Type IIb supernova SN 2011dh 
    Sahu, D. K; Anupama, G. C; Chakradhari, N. K (Oxford University Press on behalf of the Royal Astronomical Society, 2013-07-21)
    Optical UBVRI photometry and low-resolution spectroscopy of the Type IIb supernova SN 2011dh in M51 are presented, covering the first year after the explosion. The light curve and spectral evolution are discussed. The early ...
  • One-third spectrum in large scale Hall-magnetohydrodynamic turbulence 
    Krishan, V; Mahajan, S. M (American Institute of Physics, 2004-11)
    In a recent study [H. Branover, A. Eidelman, and E. Golbraikh, ``On the universality of large-scale turbulence,'' Phys. Fluids 16, 845 (2004)] the properties of the large scale turbulence have been investigated theoretically ...
  • Onset of equatorial spread-f 
    Sastri, J. H; Murthy, B. S (European Geophysical Society, 1978)
  • Onset of equatorial spread-F during post-midnight period 
    Sastri, J. H (Indian Academy of Sciences, 1979-01)

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