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  • Radiative transfer with J-state interference in a two-term atom Partial frequency redistribution in the non-magnetic case 
    Smitha, H. N; Nagendra, K. N; Sampoorna, M; Stenflo, J. O (EDP Sciences, 2011-11)
    Context. Quantum interference phenomena play a fundamental role in the formation of linear polarization that arises from scattering processes in multiplets of the solar spectrum. In particular, the J-state interference ...
  • Radiative Transfer with Stokes Vector 
    Nagendra, K. N (Indian Institute of Astrophysics, Bangalore, 1986-03)
  • Radio and EUV measurements of the equatorial coronal hole of February 25, 1999 
    Subramanian, K. R; Sundaram, G. A. S (Astronomical Society of the Pacific, 2005)
    We present here the observations of the equatorial coronal hole made at 109 MHz on February 25, 1999 with the Gauribidanur Radioheliograph. The brightness temperature of this coronal hole is about 1:7£105 K.We compare our ...
  • A Radio and ultraviolet study of dual nuclei in galaxies 
    Rubinur, K (Indian Institute of Astrophysics, 2019-04)
    This thesis is aimed at studying dual nuclei in galaxies using radio and UV observations. Dual nuclei are formed during galaxy mergers in our Universe. Since we know that almost all nearby galaxies host a super-massive ...
  • Radio and X-ray Emission from Low-Luminosity AGNs: Testing Unification Hypothesis 
    Singh, V; Shastri, P; Risaliti, G; Athreya, R (Astronomical Society of the Pacific, 2010-10)
    We investigate the low-frequency radio properties and the X-ray spectral properties of a sample of Seyfert galaxies in order to compare the two subtypes of Seyferts and rigorously test the predictions of Seyfert unification.
  • Radio astronomical imaging and phase information 
    Singal, A. K (Astronomical Society of India, 2005-06)
    Some basic concepts in use for making astronomical observations at radio wavelengths are introduced. In particular the importance of phase information for imaging in radio astronomy is highlighted. Using simple examples ...
  • Radio Astronomy Centre, Ootacamund 
    Swarup, G (Astronomical Society of India, 1974-03)
  • The radio brightness of the undisturbed outer solar corona in the presence of a radial magnetic field 
    Golap, K; Sastry, Ch. V (Springer, 1994-03)
    The radio brightness of the quiet outer solar corona at a frequency of 35 MHz in the presence of a radial magnetic field is computed. It is found that the brightness temperature of the ordinary radiation increases ...
  • The Radio Bursts from the Outer Corona 
    Thejappa, G (Indian Institute of Astrophysics, Bangalore, 1988)
  • Radio Continuum and H I Study of Blue Compact Dwarf Galaxies 
    Ramya, S; Kantharia, N. G; Prabhu, T. P (IOP Publishing, 2011-02)
    The multifrequency radio continuum and 21 cm H I observations of five blue compact dwarf (BCD) galaxies, Mrk 104, Mrk 108, Mrk 1039, Mrk 1069, and I Zw 97, using the Giant Meterwave Radio Telescope (GMRT) are presented ...
  • A radio continuum and H I study of optically selected blue compact dwarf galaxies: Mrk 1039 and Mrk 0104 
    Ramya, S; Kantharia, N. G; Prabhu, T. P (Astronomical Society of the Pacific, 2009-09)
    We present a GMRT radio continuum and H I study of two Blue Compact Dwarf (BCD) galaxies Mrk 1039 and Mrk 0104. GMRT 610 MHz observations of Mrk 1039 show that the emission is coincident with a bright intense star forming ...
  • Radio emission as a diagnostic for solar coronal rotation 
    Vats, H. O; Deshpande, M. R; Mehta, M; Shah, C. R; Shah, K. J (Astronomical Society of India, 1999)
    The time series of solar radio emission at 2.8 GHz is analysed using correlation methods. The analysis showed that this type of time series can be used to infer the rotation period of the source (in this case solar corona). ...
  • Radio emission by parallel acceleration mechanism 
    Krishan, V; Sivaram, C (Springer, 1983-04)
    The equations describing the linear-acceleration mechanism of radiation emission are generalized and applied to type III and IIIb solar radio bursts. A general expression for the power emitted by an electron in a spatially ...
  • Radio Emission by Particles Accelerated in Pulsar Magnetosphere 
    Thomas, R. M. C; Gangadhara, R. T (Astronomical Society of India, 2003)
    We present a relativistic model of pulsar radio emission by plasma accelerated along the rotating magnetic field lines projected on to a 2D plane perpendicular to the rotation axis. We have derived the expression for the ...
  • Radio emission by particles due to pulsar spin 
    Thomas, R. M. C; Gangadhara, R. T (EDP Sciences, 2005-07)
    We present a relativistic model for the motion of charged particles in rotating magnetic field lines projected onto a plane perpendicular to the rotation axis. By making an approximation that the projected field lines are ...
  • Radio emission from a helical electron beam-plasma system in a twisted magnetic field 
    Krishan, V (Institute of Physics, 1982-01)
    The excitation of electromagnetic radiation near the harmonics of electron plasma frequency from a helical electron beam travelling parallel to a helical magnetic field through a stationary inhomogeneous plasma is studied. ...
  • Radio emission from an intense electromagnetic beam-plasma system 
    Krishan, V (D. Reidel Publishing Co., 1979-06)
    Interaction of a high-intensity and low-frequency electromagnetic beam with a plasma is investigated. The dynamics of plasma particles under this strong electromagnetic field is calculated without using the perturbation ...
  • Radio emission from binary systems 
    Venugopal, V. R (Astronomical Society of India, 1990)
    The radio emission from a few binary systems is discussed. RS CVn stars, the Algol-type systems CC Cassiopeae, AR Lacertae, Beta Persei, and the X-ray emitting radio stars Cygnus X-3 and Sco X-1 are considered. A brief ...
  • Radio emission from Cyg X-3 
    Apparao, K. M. V (Astronomical Society of India, 2000)
    The acceleration of high energy particles by a shock produced by the passage of the secondary object in the binary system, through the wind of the primary, is considered and is shown to be adequate to account for the ...
  • Radio emission from pulsars due to relativistic plasma 
    Roy, Tridib; Gangadhara, R. T. (IOP Publishing, 2019-07)
    Pulsar radio emission is not well understood because of a lack of knowledge about the emission geometry and the plasma process involved. We develop a mechanism for pulsar radio emission that takes into account the ...

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