Aryabhatta Research Institute of Observational Sciences: Recent submissions

  • Flare activity of YZ CMi 
    Sanwal, B. B. (1975-05-14)
  • Photoelectric monitoring of the flars star AD Leo 
    Sanwal, B. B. (1974-10-14)
  • Flares on AD leonis and YZ minoris 
    Kapoor, R. C.; Sinvhal, S. D. (1974-06-24)
  • Variability of 59 Aur and 39 Cnc 
    Gupta, S. K.; Bhatnagar, A. K. (1974-07-14)
  • A flare on AD Leonis 
    Kapoor, R. C. (1973-11-26)
  • Photoelectric monitor of the flare stars AD Leo and EV Lac 
    Kapoor, R. C.; Sanwal, B. B.; Sinvhal, S. D. (1973-07-14)
  • Investigation of two delta scuti suspects 
    Bhatnagar, A. K.; Gupta, S. K. (1973-03-30)
  • Flares of YZ CMi 
    Kapoor, R. C. (1973-01-25)
  • Photoelectric surveillance of the flare stars YZ CMi, AD Leo and EV Lac 
    Kapoor, R. C.; Sinvhal, S. D. (1972-12-30)
  • Light variations of 59 Piscium 
    Gupta, S. K.; Bhatnagar, A. K. (1972)
  • Spectrophotometry of comet Bennett 
    Babu, G. S. D.; Saxena, P. P. (1972)
    Phtotoelectric spectrum scans of the head of comet Bennett (1969i) covering the range 352÷612 mμ are presented and the emission features of CN, CH, C₂ and Na have been identified. The scattered light becomes redder as the ...
  • Molecules in eta aquilae 
    Pande, M. C.; Joshi, G. C.; Tripathi, B. M.; Gaur, V. P. (1971)
    The total numbers Iφ(AB) of a given molecule AB in a column extending between τ=0 to τ=3.00 have been calculated for various phases ɸ of light variations in η Aql for the molecules CO, CN, C ₂ , OH, NH and CH. It is found ...
  • On magnetic stars 
    Babu, G. S. D.; Sinvhal, S. D. (1972)
    A statistical study of magnetic stars reveals that their mean rotational velocities do not depend on their magnetic field strengths. Also that stars with low magnetic field strengths are mostly Mn stars and those with high ...
  • Intensity oscillations across the Ca II K line 
    Punetha, L. M. (1974)
    Intensities at various wavelengths in the Ca II K line over a 10 minute duration time series spectra have been examined for oscillations. Three components have been observed: 1) large period, ≥1000 second, due to the ...
  • Fine structure in CaII K line 
    Punetha, L. M. (1974)
    CaII K line spectrograms were traced at various wavelengths along the slit and also along the dispersion at regular intervals. Statistical properties, root mean square variation, full width at half maxima, autocorrelation ...
  • Nitric oxide in sunspots 
    Gaur, V. P. (1974)
    The calculated equivalent width of R₁ (26.5) line of the 0-1 vibration-rotation band of NO near 5.3 μm for the sunspot model of Stellmacher and Wiehr (1970) suggests the likelihood of the presence of this band in sunspot ...
  • Vibration-rotation bands of HF, HBr and HI in the sunspot spectrum 
    Pande, M. C.; Gaur, V. P. (1974)
    The calculated equivalent widths of R(7), R(9) and R(13) lines of 1-2 vibration-rotation band of HF for Henoux’s (1969) sunspot model suggest the presence of this band in sunspot spectrum. The reasons for the absence of ...
  • Ballik-ramsey band in solar spectrum 
    Pande, M. C.; Sinha, K. (1974)
    Equivalent width calculations for a line 1.83 μ of the 0-0 vibrational band of the Ballik-Ramesy band system has been carried out in two photospheric models- BCA and HSRA. Centre to limb variation of the above line is given ...
  • On the equivalent width of CH line in eta aquilae 
    Joshi, G. C. (1973)
    Equivalent widths of a line belonging to the 0-0 bands of the electronic transition ²∆-²∏ of the CH molecule have been calculated for various phases of light variation in η Aql. For the spectral calss of η Aql the equivalent ...
  • Formation of C₂ molecules in solar atmosphere 
    Sihna, K.; Pande, M. C. (1974)
    It is shown that while the triplet states of Swan bands are populated through an LTE path, the singlet states of Phillilps bands are not. The problems regarding the observations of t he various bands of C₂ molecules in the ...

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