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Browsing by Author "Srinivasa Rao, M"

Browsing by Author "Srinivasa Rao, M"

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  • Srinivasa Rao, M; Sengupta, S (Elsevier B. V., 2004-03)
    The mean intensity of planetary nebulae with an expanding atmosphere is modeled by considering dusty and dust-free atmospheres. The bulk matter density is determined from the adopted velocity field through the equation of ...
  • Srinivasa Rao, M; Varghese, B. A (Astronomical Society of India, 1993)
    We calculated the spectral line profiles in a spherically symmetric expanding medium. Complete redistribution of photons in the line for a two level atom is assumed with Doppler profile function in a purely scattering ...
  • Kjurkchieva, D. P; Dimitrov, D. P; Ibryamov, S. I.; Srinivasa Rao, M (Astronomical Society of India, 2013-06)
    Our BVI photometric observations reveal that GSC 2701-2527 is a high amplitude ᵟ Scuti star with quite low temperature. The frequency analysis exhibits that it is multiperiodic pulsator. The obtained period ratio f1/ ...
  • Varghese, B. A; Srinivasa Rao, M (Springer, 2016-03)
    In a close binary system, the effects of irradiation are studied from an extended surface of the secondary component on the atmosphere of the primary. Primary and the secondary components are assumed to have equal radii ...
  • Srinivasa Rao, M; Varghese, B. A (Anita Publications, 2004-12)
    We studied the reflection effect in 2-dimensional geometry to see how the field will change if we calculate the reflected radiation by the transfer equation in a close binary system. The reflected radiation is calculated from ...
  • Antokhina, E. A; Srinivasa Rao, M; Parthasarathy, M (Elsevier B.V, 2011-04)
    Hipparcos photometric data for the massive O-type binary UW CMa were analysed within the framework of the Roche model. Photometric solutions were obtained for five mass ratios in the q = M2/M1 = 0.5–1.5 range. The system ...
  • Ivanov, V. P; Kjurkchieva, D. P; Srinivasa Rao, M (Astronomical Society of India, 2010-09)
    We propose a procedure for light-curve solutions of eclipsing binary stars in the Small Magellanic Cloud (SMC) for which photometric data have been obtained in the framework of the OGLE project. We also present a way of ...
  • Peraiah, A; Srinivasa Rao, M; Varghese, B. A (Indian Institute of Astrophysics, Bangalore, 1986)
    We have applied the discrete space theory of radiative with the integral operator technique to calculate the spectral line profiles formed in a spherically symmetric expanding stellar atmospheres. We calculated the source ...
  • Peraiah, A; Srinivasa Rao, M (Indian Institute of Astrophysics, Bangalore, 1985-11)
    We have presented a series of P Cygni type profiles of special lines computed by employing different velocity laws of expansion in a spherically atmosphere. A comparison has been made with those of Beals classification. ...
  • Devarapalli, Shanti Priya; Jagirdar, Rukmini; Gundeboina, Vinay Kumar; Thomas, Vineet S; Srinivasa Rao, M (2022-07)
    Subdwarf (sdB) stars include core helium-burning stars with a very thin hydrogen envelope that lies at the blue end of the horizontal branch (or extreme horizontal branch). Among them, short-period sdB binaries especially ...
  • Srinivasa Rao, M (Royal Astronomical Society, 2005-03)
    A general expression for the gravity darkening of the tidally and non-uniformly rotating Roche components of close binary systems is used to calculate the uniform rotational effects on line profiles in an expanding atmosphere. ...
  • Peraiah, A; Srinivasa Rao, M (EDP Sciences, 2002-07)
    We studied the transfer of line radiation in the distorted and expanding atmospheres of close binary components. We assumed that the distortion of the atmosphere is caused by self rotation and tidal force exerted by the ...
  • Srinivasa Rao, M; Peraiah, A (EDP Sciences, 2000-09)
    We studied the formation of lines in the irradiated expanding dusty atmospheres of the components of close binary systems. We considered a two-level atom approximation in Non-LTE situation with complete redistribution. The ...
  • Srinivasa Rao, M (The Astronomical Society of the Pacific, 2003-01)
    The theoretical modeling of binary systems can be performed by considering realistic models which take into account the radiative transfer, hydrodynamics, reflection effect, temperature structure etc. Since the problem is ...
  • Peraiah, A; Srinivasa Rao, M (Indian Academy of Sciences, 1983-09)
    The law of limb darkening has been calculated when the atmosphere of the primary component is illuminated by the extended surface of the secondary component in a binary system. The specific intensities calculated at infinity ...
  • Peraiah, A; Srinivasa Rao, M (Indian Academy of Sciences, 1983-09)
    The effects of reflection on the formation of spectral lines is investigated. The authors have assumed a purely scattering atmosphere and studied how the equivalent widths change due to irradiation from the secondary. ...
  • Srinivasa Rao, M; Varghese, B. A (Springer, 2014-02)
    Reflection effect phenomenon is studied on the formation of spectral lines in a close binary system when primary component has an extended atmosphere and the secondary component is a point source. Irradiation effect is ...
  • Peraiah, A; Srinivasa Rao, M (The European Southern Observatory, 1998-10)
    We studied the effects of irradiation on the line formation in the expanding atmospheres of the components of close binary systems. We considered a two-level atom approximation in Non-LTE situation. The thickness of the ...
  • Peraiah, A; Srinivasa Rao, M; Varghese, B. A (Elsevier, 2011-03)
    Radiative transfer equation in plane parallel geometry and Kompaneets equation is solved simultaneously to obtain theoretical spectrum of 1–125 keV photon energy range. Diffuse radiation field are calculated using ...
  • Srinivasa Rao, M (Astronomical Observatory, Serbia, 2010-06)
    SUMMARY: We have investigated the effects of Compton broadening due to electron-photon scattering in hot stellar atmospheres. A purely electron-photon scattering media is assumed to have plane parallel geometry with an ...

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