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Browsing Publications of Astronomical Society of India by Author "Kameswara Rao, N"

Browsing Publications of Astronomical Society of India by Author "Kameswara Rao, N"

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  • Abundance analysis of extreme helium stars 
    Pandey, G; Kameswara Rao, N; Lambert, D. L; Jeffery, C. S; Asplund, M (Astronomical Society of India, 2000)
    High resolution spectra were obtained for a sample of hydrogen-deficient stars which are hotter than the R CrB stars and cooler among the extreme helium stars (EHe). We believe that these stars are transition objects ...
  • Aspects of prehistoric astronomy in India 
    Kameswara Rao, N (Astronomical Society of India, 2005-12)
    Some archeoastronomical aspects regarding the development of observational astronomy in India during prehistoric times are described. A plea is made for the preservation of megalithic monuments of possible astronomical ...
  • Astronomical orientations of the megalithic stone circles of Brahmagiri 
    Kameswara Rao, N (Astronomical Society of India, 1993-03)
    The megalithic stone circles at Brahmagiri which have been dated as 900 BC show clear astronomical orientations. The site lines from the center of a circle to an outer tangent of another circle points out to the directions ...
  • Astronomy with Buddhist stupas of Sanchi 
    Kameswara Rao, N (Astronomical Society of India, 1992)
  • Astronomy with Vainu Bappu Telescope 
    Kameswara Rao, N (Astronomical Society of India, 1995-09)
  • Ca II K Emission in Canopus 
    Bappu, M. K. V; Mekkaden, M. V; Kameswara Rao, N (Astronomical Society of India, 1984-06)
    The Changes in the Ca II K line profile of the F0 supergiant Canopus have been studied from the high dispersion coude spectrograms obtained since 1975. The emission in the core of the line is variable in a timescale of few ...
  • DZ Andromedae : A search for the spectral evidence of its possible RCB nature 
    Goswami, A; Kameswara Rao, N; Lambert, D. L (Astronomical Society of India, 1999)
    The analysis of high-resolution spectra of DZ Andromedae, a suspected R Coronae Borealis variable, is presented here. The spectra of DZ And show the characteristics of a normal K2 III star, indicating that the star was ...
  • The evolutionary considerations of R CR B stars - Observational approach 
    Kameswara Rao, N (Astronomical Society of India, 1990)
    The properties of the hydrogen-deficient stars called extreme helium stars, R Cr B stars, and hydrogen-deficient carbon stars are briefly examined, emphasizing the R Cr B stars. Luminosities and temperatures, distribution ...
  • Father J. Richaud and early telescope observations in India 
    Kameswara Rao, N; Vagiswari, A; Louis, C (Astronomical Society of India, 1984-03)
    Father Richard who discovered the binary nature of alpha Centauri from Pondicherry is probably the first person to use a telescope on Indian soil. A brief sketch of his life and astronomical contributions from India are presented.
  • A high resolution spectroscopic study of XX Ophiuchi 
    Goswami, A; Kameswara Rao, N; Lambert, D. L (Astronomical Society of India, 2001)
    The star XX Oph has been known to exhibit peculiar spectral variabilities since the work of Merrill in 1924. A high resolution spectroscopic study of the XX Oph spectra taken in July 1996 and later in June 1997 also exhibit ...
  • High Resolution Spectroscopy of QY Sge 
    Kameswara Rao, N; Goswami, A; Lambert, D. L (Astronomical Society of India, 2002-09)
    High resolution spectral analysis of QY Sge, a post AGB star is presented here. The spectrum of QY Sge is characterized by three major components: absorption lines representative of a G supergiant, sharp emission lines ...
  • Interstellar dust studies with TAUVEX 
    Maheswar, G; Muthu, C; Sujatha, N. V; Pandey, G; Bhatt, H. C; Kameswara Rao, N; Murthy, J (Astronomical Society of India, 2007-06)
    We propose to carry out studies on the properties of inter- stellar dust using TAUVEX. Through the multi-band TAUVEX observations, particularly with the use of filters optimized for extinction observations of the 2175 ° ...
  • Is HR 2947 a variable? 
    Kameswara Rao, N; Ashok, N. M; Kulkarni, P. V (Astronomical Society of India, 1981-06)
    Observations of HR 2947 show that it is fainter by 0.3 mag in V compared to the magnitude listed by Cowley et al. (1969). The energy distribution from 1565 Armstrong to 1.25 micro is similar to that of a B5 III star and ...
  • Polarimetric study of the RV Tauri star AC Herculis 
    Raveendran, A. V; Kameswara Rao, N; Anandaram, M. N (Astronomical Society of Indian, 1989-09)
    BVRI polarimetry of AC Her shows that the wavelength dependence of polarization is weak with a marginal increase towards blue and that the position angle is nearly independent of wavelength. It is argued that the interstellar ...
  • Probing circumstellar dust formation through high resolution spectroscopy 
    Kameswara Rao, N (Astronomical Society of India, 2005-06)
    The existence of cool regions where dust can condense is explored in RCB stars at minimum
  • Some Spectroscopic Problems of Coronae Borealis Stars 
    Kameswara Rao, N (Astronomical Society of India, 1975-09)
  • A Spectral Analysis of HD 165553 
    Goswami, A; Kameswara Rao, N; Lambert, D. L (Astronomical Society of India, 2003)
    High resolution spectra of HD 165553, a star reported to be a spectroscopic binary of spectral type F8 Ib are analysed. The stellar parameters - effective temperature, surface gravity and microturbulence are determined ...
  • Stellar astronomy with VBT 
    Kameswara Rao, N (Astronomical Society of India, 1993)
    The 2.34 meter Vainu Bappu Telescope (VBT) has been operating as a national facility for the last 3-4 years. Some of the current observational programs with VBT regarding the galactic astronomy are reviewed
  • Ultra Violet Imaging Telescope (UVIT) Science* 
    Kameswara Rao, N (Astronomical Society of India, 2003)
    Some of the significant areas of astronomy that would be persued by UVIT, one of the payloads on the proposed Indian multiwavelength astronomy satellite ASTROSAT, is described. Some of the considerations and uniqueness of ...

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