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  • Frenet-Serret description of gyroscopic precession 
    Iyer, B. R; Vishveshwara, C. V (The American Physical Society, 1993)
    The phenomenon of gyroscopic precession is studied within the framework of the Frenet-Serret formalism adapted to quasi-Killing trajectories. Its relation to the congruence vorticity is highlighted with particular reference ...
  • Frequency and time profiles of metric wave isolated Type I solar noise storm bursts at high spectral and temporal resolution 
    Sundaram, G. A. S; Subramanian, K. R (Royal Astronomical Society, 2005-05)
    Type I noise storms constitute a sizeable fraction of the active Solar radio emission component. Observations of isolated instances of such bursts, in the swept-frequency mode at metric wavelengths, have remained sparse, ...
  • The frequency drift and time splitting of decameter solar radio bursts 
    Sastry, Ch. V (Gordon and Breach, Science Publishers Ltd., 1972-05)
    The frequency drift and time splitting of solar radio bursts are observed with a multi-channel radiometer and a polarimeter at frequencies around 25 MHz. It is found that a majority of noise storm bursts have drift ...
  • Frequency response of magnetic flux sheaths 
    Venkatakrishnan, P (D. Reidel Publishing Co., 1979-08)
    When a sound wave is incident on a magnetic flux sheath, it causes fluctuations in the mean magnetic field of the sheath. We have calculated the space-average of the longitudinal component of these fluctuations and plotted ...
  • Frequency shifts and line broadening of radiation from rotating neutron stars 
    Kapoor, R. C; Datta, B (The Royal Astronomical Society, 1984-08)
    The frequency shifts and line broadening of radiation from the surface of rapidly rotating neutron stars are calculated using a rotationally perturbed interior spherical metric and a representative choice of the equation ...
  • Frequency-dependent core shifts and parameter estimation for the blazar 3C 454.3 
    Mohan, Prashanth; Agarwal, A; Mangalam, A; Gupta, A. C; Wiita, P. J; Volvach, A. E; Aller, M. F; Aller, H. D; Gu, M. F; Lahteenmaki, A; Tornikoski, M; Volvach, L. N (Oxford University Press on behalf of the Royal Astronomical Society, 2015-09-11)
    We study the core shift effect in the parsec-scale jet of the blazar 3C 454.3 using the 4.8– 36.8 GHz radio light curves obtained from three decades of continuous monitoring. From a piecewise Gaussian fit to each flare, ...
  • Frequency-Dependent Damping in Propagating Slow Magneto-Acoustic Waves 
    Krishna Prasad, S; Banerjee, D; Doorsselaere, T. V (IOP Publishing, 2014-07-10)
    Propagating slow magneto-acoustic waves are often observed in polar plumes and active region fan loops. The observed periodicities of these waves range from a few minutes to a few tens of minutes and their amplitudes were ...
  • Frequency-Dependent Lg Attenuation in the Indian Platform 
    Mitra, S; Priestley, K; Gaur, V. K; Rai, S. S (Seismological Society of America, 2006-12)
    We use seismograms from regional earthquakes recorded on digital seismographs in peninsular India to determine the frequency-dependent Q of Lg for the Indian platform. We measure Lg attenuation by determining the decay of ...
  • A fresh look at the seismic spectrum of HD49933: analysis of 180 days of CoRoT photometry 
    Benomar, O; Baudin, F; Campante, T. L; Chaplin, W. J; García, R. A; Gaulme, P; Toutain, T; Verner, G. A; Appourchaux, T; Ballot, J; Barban, C; Elsworth, Y; Mathur, S; Mosser, B; Régulo, C; Roxburgh, I. W; Auvergne, M; Baglin, A; Catala, C; Michel, E; Samadi, R (EDP Sciences, 2009-11)
    Context. Solar-like oscillations have now been observed in several stars, thanks to ground-based spectroscopic observations and space-borne photometry. CoRoT, which has been in orbit since December 2006, has observed the ...
  • Fresh results from modelling the gravitationally lensed system PKS 1830-211 
    Nair, S; Garrett, M. A (Astronomical Society of India, 2000)
    Fresh modelling of PKS1830-211 points to a perturbation in the NE image by a lens of globular cluster scale.
  • From Dust to Dust and in Between 
    Shah, G. A (Astronomical Society of India, 1978-12)
  • From letters of Captain Jacob to Mr.Grant 
    Jacob, W. S (Royal Astronomical Society, 1857-04)
  • From macro to micro management of information in Indian Institute of Astrophysics Library 
    Birdie, C; Mohan, B. S; Prabahar, P (Indian Institute of Astrophysics Library, 2008-04-15)
    This poster presents an introduction to collections and services of IIA library and the libraries at field stations. It briefs about Open Access Repository,Archives, Bibliometrics & Scientometric studies and Future Programs ...
  • From maximum force to the field equations of general relativity and implications 
    Kenath, Arun; Schiller, Christoph; Sivaram, C (World Scientific Publishing, 2022-10-15)
    There are at least two ways to deduce Einstein’s field equations from the principle of maximum force c4/4G or from the equivalent principle of maximum power c5/4G . Tests in gravitational wave astronomy, cosmology, and ...
  • From nearby low luminosity AGN to High Redshift Radio Galaxies: science interests with square kilometre array 
    Kharb, P; Lal, D. V; Singh, V; Bagchi, J; Ishwara-Chandra, C. H; Hota, A; Konar, C; Wadadekar, Yogesh; Shastri, P; Mousumi Das; Baliyan, K; Nath, B. B; M. Pandey-Pommier (Springer, 2016-12)
    We present detailed science cases that a large fraction of the Indian AGN community is interested in pursuing with the upcoming Square Kilometre Array (SKA). These interests range from understanding low luminosity active ...
  • From the IIA Archives 
    IIA Archives (Indian Institute of Astrophysics, 2008-09)
  • From the margins to the mainstream: Nobel celebrates exoplanets! 
    Puravankara, Manoj; Banyal, R. K; Narang, Mayank (Indian Physics Association, 2019-12)
    This year’s Physics Nobel Prize was jointly awarded to three scientists. Phillip James Peebles from Princeton University, USA, received one half of the prize for his seminal work on physical cosmology, and other half was ...
  • Full non-LTE spectral line formation II. Two-distribution radiation transfer with coherent scattering in the atom’s frame 
    Paletou, F; Sampoorna, M; Peymirat, C (EDP Sciences, 2023-03)
    In this article we discuss a method for obtaining a numerical solution to the so-called full nonlocal thermodynamic equilibrium (nonLTE) radiation transfer problem. More specifically, the usual numerical iterative methods ...
  • Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye 
    Wyrzykowski, L; Mroz, P; Rybicki, K. A; Gromadzki, M; Kolaczkowski, Z; Zielinski, M; Zielinski, P; Britavskiy, N; Gomboc, A; Sokolovsky, K; Hodgkin, S. T; Abe, L; Aldi, G. F; AlMannaei, A; Altavilla, G; Al Qasim, A; Anupama, G. C; Awiphan, S; Bachelet, E; Bakış, V; Baker, S; Bartlett, S; Bendjoya, P; Benson, K; Bikmaev, I. F; Birenbaum, G; Blagorodnova, N; Blanco-Cuaresma, S; Boeva, S; Bonanos, A. Z; Bozza, V; Bramich, D. M; Brun, I; Burenin, R. A; Burgaz, U; Butterley, T; Caines, H. E; Caton, D. B; Calchi Novati, S; Carrasco, J. M; Cassan, A; Cepas, V; Cropper, M; Chruslinska, M; Clementini, G; Clerici, A; Conti, D; Conti, M; Cross, S; Cusano, F; and 134 co-authors (EDP Sciences, 2020-01)
    Gaia16aye was a binary microlensing event discovered in the direction towards the northern Galactic disc and was one of the first microlensing events detected and alerted to by the Gaia space mission. Its light curve ...
  • Full resolution deconvolved images from the Mauritius Radio Telescope 
    Pandey, V. N; Oozeer, N; Shankar, N. U; Somanah, R (Astronomical Society of India, 2002-09)

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