ARIES Insitutional Digital Repositary (ARIES-IDR): Recent submissions

  • Semi-regularities in the photospheric magnetic fields 
    Shelker, R. N.; Pande, M. C. (1986)
    Using Stanford large-scale magnetic field synoptic charts of rotation 1676 to 1739 and by delineating LLUMR, i.e., long-lived unipolar magnetic regions of both polarities surviving at least for four solar rotations, the ...
  • Association of solar flares with twisting of magnetic neutral lines 
    Uddin, W.; Pande, M. C.; Shelke, R. N. (1986)
    Assuming that the flares tend to occur in highly sheared magnetic fields which also lead to a twisting of magnetic neutral line in complex active regions, we have defined a ‘twisting index’. The correlation of this twisting ...
  • On some visible and infrared atomic hydrogen lines in three photospheric models 
    Bondal, K. R.; Gaur, V. P. (1986)
    The behavior of the line profiles in the wings of the first four lines of the Balmer, Paschen and Brackett series in the solar spectrum at the disc centre has been investigated with a view to comparing the computed profiles ...
  • Gravitational radiation and spiralling time of close binary systems (II) 
    Padalia, T. D. (1988)
    Power-output by gravitational radiation (Pв) and spiralling time (τₒ) for individual systems of twelve early (B) type binary systems have been evaluated. A new relation between Pв and τₒ obtained. It is found that most of ...
  • A note on the BBSAG visual observations 
    Srivastava, R. K. (1989)
    This letter contains some comments on the communication by Diethelm and Locher (1988) concerning the period variations in the eclipsing binary systems EE Aqr, BZ Eri, IZ Per, and VZ Hya. Significance of the BBSAG visual ...
  • Spectrophotometric study of the Cepheids DT Cyg and SZ Tau 
    Sanwal, B. B.; Rautela, B. S. (1989)
    The effective temperature of the cepheids DT Cyg and SZ Tau have been determined from a comparison of their spectral scans with appropriate stellar model atmospheres. using these temperatures and an independent Wesselink ...
  • A spectrophotometric study of GG Cassiopeiae 
    Chaubey, U. S.; Singh, M. (1989)
    The continum energy distribution of a totally eclipsing binary system GG Cas at phase 0.ᴾ903 and 0.ᴾ003 in the wavelength range λλ3200-7600 Å have been presented and discussed. The flux of continum of the secondary star ...
  • Spectrophotometry of V711 Tauri 
    Joshi, S. C.; Srivastava, R. K.; Srivastava, J. B. (1989)
    SPectrophotometric observations of the RS CVn binary system V711 Tau (HR 1099), covering the wavelength interval λλ3300-7100 Å, have been presented. A comparision of the standard spectral scans of V711 Tau with the spectral ...
  • Integrated parameters of open clusters 
    Pandey, A. K.; Bhatt, B. C.; Mahra, H. S.; Sagar, R. (1989)
    Integrated magnitudes and colours of population I synthetic clusters have been derived using the theoretical evolutionary tracks fiven by Stothers and Iben and an age-dependent intials mass function (IMF) obtained from the ...
  • Spectrophotometric observations of HR 8107 
    Joshi, S. C.; Ojha, D. K.; Srivastava, J. B. (1989)
    HR 8107, a reported new Be star, has been observed spectrophotometrically. The energy distribution curve of the star has been compared with those of other stars of similar spectral and luminosity types and model atmospheres. ...
  • Spectrophotometry of Comet Bradfield (1987s) 
    Ojha, D. K.; Joshi, S. C. (1989)
    Special scans of COmet Bradfield (1987s) at heliocentric distance of 1.539 AU have been observed spectrophotometrically. The column densities and production rates of C₂and CN have been derived.
  • Photoelectric photometry of Comet Bradfield (1987s) 
    Padalia, T. D. (1989)
    UBV observations and magnitude of head of Comet Bradfield (1987s) during six nights in December 1987 are given. Magnitude and intensity variations and colour indices of three circular zones from the centre of the cometary ...
  • Period study of AW UMa 
    Srivastava, R. K. (1989)
    A detailed study of the eclipsing binary system AW UMa is presented. A new period (P = 0.ᵈ4387317) is given. Period changes in different portions of the O-C diagram, based on new period, have been estimated. The total ...
  • Light variability in ɛ UMa 
    Srivastava, R. K. (1989)
    First U, B, and V observations of ɛ UMa are presented. Light curves show light variations of varying amplitude. Colour indices also show small colour variations.
  • Spectrophotometric study of Comet Bradfield (1987s) 
    Rautela, B. S.; Sanwal, B. B. (1988)
    Spectrophotometric observations of head of comet Bradfield (1987s) during three nights in 1987 are presented. An estimate of the CN, C₂, and C₃ column densities and production rates have been made.
  • Detection of new short period oscillations in PG 1711+336 (V795 HER) 
    Ashoka, B. N.; Seetha, S.; Marar, T. M. K.; Padmini, V. N.; Kasturirangan, K.; Rao, U. R.; Pande, M. C.; Mahra, H. S. (1989)
    Long period light variations of the cataclysmic variables PG 1711+336 (V795 Her) were first noticed by Mironov et al. (1983 a,b) who reported a photometric period of 0.115883 day for the system. Baidak et al., (1985) ...
  • The age distribution of open clusters as a function of Trumpler's classifications 
    Bhatt, B. C.; Pandey, A. K.; Mahra, H. S. (1989)
    Typical lifetime of an open cluster is rather short compared to the age of the Galaxy, but there exists a wide spread in the individual lifetimes. The observed age distribution of the clusters. Trumpler (1930) has classified ...
  • Yake effects in various telescope mirrors 
    Gupta, K. G. (1989)
    The yake effects in the 56 cm and the 38 cm pyrex mirrors of the Uttar Pradesh State Observatory is described. Similarly effects elsewhere are also discussed.
  • On infrared excess emission from HZ Herculis 
    Ghosh, S. K.; Iyengar, K. V. K.; Verma, R. P.; Srivastava, R. K. (1989)
    In an attempt to confirm the recently observed 1.6 µm excess emission from RZ Her (Gnedin et al. 1986), we report negative results from observations made at identical binary phase. Implications of these measurements have ...
  • Near-infrared observations and optical identifications of a few unassociated IRAS sources with dust shells 
    Lyengar, K. V. K.; Ghosh, S. K.; Rengarajan, T. N.; Verma, R. P.; Joshi, S. C.; Srivastava, R. K. (1989)
    We have carried out near infrared observations of twenty six unassociated IRAS sources with dust shells. Twenty of these belong to the group that have IRAS low resolution spectral characteristic (LRSCHAR = 4n), classified ...

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