ARIES-Institutional Digital Repository

Browsing by Author "Goraya, P. S."

Browsing by Author "Goraya, P. S."

Sort by: Order: Results:

  • Absolute spectrophotometry of comet Kohoutek 1973f during post-perihelion passage 
    Goraya, P. S.; Rautela, B. S.; Sanwal, B. B. (1986)
    Absolute spectrophotometry of the coma of Comet Kohoutek 1973f during post-perihelion period has been presented for seven nights in January 1984. Moderately wide range of heliocentric distance (0.436-0.799 AU) covered ...
  • Brightness changes in P/Halley 
    Goraya, P. S.; Srivastava, R. K.; Uddin, W. (1988)
    Thirty photometric magnitudes, in each filter (UBV), of P/Halley (1982i) have been measured on 1986, January 12. They show short-term variability of about 0.15 magnitude. The present measurements show the active nature of ...
  • Ca II H and K and Hα emission variability in AR Lacerate 
    Goraya, P. S.; Srivastava, R. K. (1984)
    AE Lac (=BD + 45°3813) is a well known RS CVn type eclipsing binary system. Many interesting phenomena are associated with the system such as light curve variations, star spots and radio flares. Many investigators found ...
  • Continuum energy distribution and photometric behaviour of Π Aqr 
    Goraya, P. S. (1985)
    New observations of Π Aqr in the optical and infrared (IR) region are presented. The effective temperature of Π Aqr is derived by comparing observed and computed fluxes in the optical region. No near-ultraviolet excess was ...
  • Continuum energy distribution of some bright Be stars 
    Goraya, P. S. (1984)
    The absolute flux distribution of seven bright Be stars, in the wavelength λλ350-750 nm is presented. The observed energy distribution curves are compared with Kurucz (1979) model atmospheres to estimate their effective ...
  • Distribution of absolute of bright Be stars in Pleiades 
    Goraya, P. S. (1984)
    We present newly measured energy distribution from λλ3200-7500Å of five late-type Be stars in Pleiades cluster for search of peculiarities of Be stars continuum energy distributions. Empirical effective temperatures of Be ...
  • HD91948: a new probable Be star 
    Goraya, P. S.; Padalia, T. D. (1984)
    Gorga (1971) investigated the binary nature of the star HD 91948 (=BD+60d 1274 = SAO 15243; F8V). He found it to be a spectroscopic binary with an orbital period of 2.7700266d. The first photoelectric (UBV) observations ...
  • Hα variability in alpha lyrae 
    Goraya, P. S.; Singh, M. (1983)
    Suspected variability is a valuable clue in finding new emission stars. Hα observations of bright stars with no history of line emission can lead to the discovery of hydrogen-emission stars. α Lyrae had been a well known ...
  • Hα line emission and infrared excess in Be Stars 
    Goraya, P. S.; Rautela, B. S. (1985)
    The Hα observations of a selected sample of bright Be stars are presented. The available infrared observations at K band (2.2 µm) of these stars have been used to find the infrared excess emission. The analysis of the ...
  • Molecular emission from the head of comet P/Crommelin 1818 I 
    Goraya, P. S.; Rautela, B. S.; Sanwal, B. B. (1984)
    The comet P/Crommelin has attracted the attention of a larga of scientists during its recent apparition in 1984 February. During its earlier returns (in 1818, 1873, 1928, and 1956) the motion of Comet Crommelin holds the ...
  • A note on the spectrum of Comet Austin (1982g) 
    Sanwal, B. B.; Rautela, B. S.; Goraya, P. S. (1982)
    Using the 1040 mm reflector, three spectrophotometric scans of the comet Austin (1982g) were obtained in the wavelength range λλ 3000-8000 Å on 1982 September 5, 8 and 9 at 15h, 14h and 14h UT respectively.
  • Rapid changes of brightness in P/Halley 
    Goraya, P. S.; Uddin, W.; Srivastava, R. K. (1988)
    The results of photometric measurements (in UBV filters) of Comet P/Halley during four nights in January 1986 have been presented. Rapid recurring increases of P/Halley's brightness were observed during these four nights. ...
  • Recent changes in the spectrum of the Be star 48 Persei 
    Goraya, P. S. (1985)
    A search of rapid and slow spectral variations of Balmer lines with time resolution from seconds, minutes, months, and years is carried out for 48 Per. In total, 40 spectral scans in the Hα and 13 spectral scans in the ...
  • Scanner observations of comet P/Crommelin 18181 
    Goraya, P. S.; Sanwal, B. B.; Rautela, B. S. (1986)
    Spectral scans of the coma of comet P/Crommelin 18181 have been obtained in the wavelength range λ λ3200 -6500 Å. Strong emission features of CN (λ 3883Å) anc C₂ Swan bands (λ4695, λ5165 and λ5538 Å) have been identified. ...
  • Scanner observations of the Be Stars ν Gem, k Ori, β Mon and ω CMa 
    Goraya, P. S. (1981)
    The photoelectric spectrophotometric scans of the Be stars v Gem, k Ori, β Mon and CMa have been analyzed to find out few stellar parameters. The absolute energy distributions of these stars in the wavelength range λλ ...
  • Shell episode of Pleione (BU Tau) 
    Goraya, P. S. (1984)
    Pleione is a well known shell star in the Pleiades cluster (HD 23862, m_v = 5.20, Sp.Type B8Vn + shell according to Abt and Levato (1978)). Its photometric variability was investigated by Sharov and Lyuty (1976) who ...
  • Some infrared photometric characteristics of Be stars 
    Goraya, P. S. (1985)
    A photometric study of a large sample of Be stars is reported. Infrared homogeneous observational data in the JHKL system are used to derive some photometric characteristics of Be stars, as a class. New infrared observations ...
  • Spectrophotometric investigation of Be stars 
    Goraya, P. S.; Singh, M. (1985)
    The continuum energy distribution data of seven Be and five normal B stars have been presented in the wavelength range λλ3200-8000 Å. Empirical effective temperatures of these stars have been derived by comparing the ...
  • Spectrophotometric study of Be stars 
    Goraya, P. S. (1985)
    A large sample of Be stars has been studied spectrophotometrically in the visible region. The continuum energy distribution data for 23 Be stars included in the list of Harmanec et al. (1983) are presented and discussed ...
  • Spectrophotometry of bright Be stars 
    Goraya, P. S. (1985)
    We present new measurement of the distribution of energy in the continuum for eight Be stars in the optical region (λλ3200-7600Å). The effective temperatures of these stars have been estimated from their observed fluxes. ...

Search ARIES-IDR

Browse

My Account