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Browsing by Author "Shylaja, B. S"

Browsing by Author "Shylaja, B. S"

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  • The Absolute Magnitudes of Wolf-Rayet Stars HD 151932 and HD 152270 
    Shylaja, B. S; Bappu, M. K. V (Indian Institute of Astrophysics, Bangalore, 1983)
    The absolute visual magnitudes of two Wolf-Rayet stars HD 151932 (WN 7) and HD 152270 (WC 7+08) have been determined from their energy distributions and monochromatic magnitudes least contaminated by emission lines taking ...
  • Atmospheric Extinction at Kavalur Observatory during 1980-85 
    Shylaja, B. S; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1986)
    From a series of photoelectric scanner observations during 1980-85, the atmospheric extinction at Kavalur has been analysed. The variation of this appears to follow lamda/sup-4/ law. There is a general increase in the ...
  • The behaviour of λ4686 line of He II in Wolf-Rayet binaries 
    Shylaja, B. S (International Astronomical Union, 1987)
    The binaries with subgroup WN components have been chosen, with periods ranging from 1.64 d to 21.63 d, for understanding the effect of the companion on the formation of this line.
  • The colors of Am Stars 
    Shylaja, B. S; Babu, G. S. D (Astronomical Society of the Pacific, 1993-01)
    The energy distribution of the Am stars are affected by the line blanketing, which appears as a deviation in the behaviour of color indices with reference to the normal stars. In this paper we study the various color indices ...
  • The Colors of Am-Stars 
    Shylaja, B. S (Astronomical Society of the Pacific, 1993-01)
  • Comments on `the white dwarf collapse in low mass binary systems' 
    Shylaja, B. S; Kochhar, R. K (D. Reidel Publishing Company, 1984-08)
    White dwarfs have been shown to possess high-angular momenta, in low-mass binary systems, in the context of formation of "spinars". Whether the collapse to a neutron star occurs spontaneously or is triggered by mass transfer ...
  • A compilation of physical parameters of AP and AM stars as derived from energy distribution studies 
    Babu, G. S. D; Shylaja, B. S (Kluwer Academic Publishers, 1981-09)
    The physical parameters, such as the effective temperatures, radii, bolometric magnitudes and bolometric corrections of 87 Ap and Am stars out of the 125 compiled here are essentially based on the work done by the authors ...
  • Dating stone inscriptions from eclipse records 
    Shylaja, B. S (Astronomical Society of India, 1997)
    The solar and lunar eclipses have been documented as stone inscriptions in various parts of Karnataka in South India. Descriptions in Kannada are available from 9th century A.D onwards. The dates of these eclipses have ...
  • Emission Line Studies of Wolf Rayet Binaries 
    Shylaja, B. S (Indian Institute of Astrophysics, Bangalore, 1986)
  • The He II line 4686 in WN binaries 
    Shylaja, B. S (Indian Academy of Sciences, 1987-06)
    The behaviour of the λ4686 line of He II in various WN binaries is studied for variations in total flux as well as radial velocities. It appears that the true motion of the WN component is not depicted by this line especially ...
  • How Normal are the Peculiar A-Stars 
    Babu, G. S. D; Shylaja, B. S (Astronomical Society of the Pacific, 1993-02)
  • The infrared fluxes of early type stars 
    Shylaja, B. S (Astronomical Society of India, 1994)
    It is well known that the strong winds of the early type stars modify the fluxes in the infrared and radio wavelength regions. This aspect has been used here to explain the infrared fluxes by the method of 'curve of growth'. ...
  • IR observations of Am stars 
    Shylaja, B. S; Ashok, N. M (Astronomical Society of India, 2002)
    The IR observations of chemically peculiar stars are carried out and compared with the previous data in IR and far IR from IRAS. The flux redistribution appears to be a common phenomenon in all the stars of this class. The ...
  • Life on Europa? 
    Shylaja, B. S (Astronomical Society of India, 1997)
  • On the radii of Ap and Am stars 
    Babu, G. S. D; Shylaja, B. S (D. Reidel Publishing Co., 1983-01)
    The radii of several Ap and Am stars have been compared with those of the normal A stars of the main sequence. Though the brighter Ap stars have a little larger radii than the main sequence stars, they may not be much ...
  • Photometry of BD -7 deg 3007 
    Shylaja, B. S (Kluwer Academic Publishers, 1987-02)
    Photometric observations of BD -7°3007 in B and V filters are reported. Rapid flickering appears to be present at all phases, implying an unfavourable angle of inclination of orbit for seeing eclipse effects. A modulation ...
  • Photometry of EX Hya 
    Shylaja, B. S (Kluwer Academic Publishers, 1985-04)
    Photometric observations of EX Hya in B and V filters are reported. The 67 min modulation of the light curve is also found to be in good agreement with the results of earlier studies. The (B-V) colour variation with respect ...
  • Re-analysis of close binary systems 
    Indulekha, K; Kundt, W; Shylaja, B. S (Kluwer Academic Publishers, 1990-10)
    The facts indicating that large line-forming regions occur among the best-studied close binaries are outlined. It is pointed out that emission lines are often redshifted while absorption lines are blueshifted, emission ...
  • Recent outburst of U ScorpII 
    Shylaja, B. S; Prabhu, T. P (Indian Institute of Astrophysics, 1979-11)
    A photoelectric scan of Hβ and a photographic spectrum between λλ 4500-7000 obtained during the 1979 outburst of the recurrent nova U Sco have been studied. The electron density and the mass of ionized hydrogen in the nova ...
  • The solar corona in the He II line 
    Shylaja, B. S (Indian Institute of Astrophysics, 1997)
    The corona of the sun was photographed with the filters centered at 4686Å, 4921 Å and 5812 Å, on 24th October 1995, during totality at Nim Ka Thana The PDS scans of these Images were presented The differences In the contours ...

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