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  • On the observability of CO and CO⁺ in eta aquilae 
    Pande, M. C.; Joshi, G. C. (1972)
    The equivalent widths of R(29) line belonging to 0-2 in η Aql are found to be 0.200 m Å and 4.17 m Å and of R(31) m Å at maximum and minimum phases respectively. Thus if Dawe’s model atmospheres are realistic there is some ...
  • Ionised molecules in BCA photospheric model 
    Pande, M. C.; Gaur, V. P. (1972)
    The dissociation equilibrium of ionized diatomic molecular species CO⁺, N O⁺, OH⁺, O₂⁺, N₂⁺, H₂⁺ in BCA photospheric model is considered. The abundances of these species are in the order H₂⁺, CO⁺, OH⁺, NO⁺, O₂⁺ and N₂⁺. ...
  • 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 ...
  • 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 ...
  • Light variations of 59 Piscium 
    Gupta, S. K.; Bhatnagar, A. K. (1972)
  • Photoelectric surveillance of the flare stars YZ CMi, AD Leo and EV Lac 
    Kapoor, R. C.; Sinvhal, S. D. (1972-12-30)
  • Absolute energy distribution og two δ scuti variable 
    Joshi, S. C.; Rautela, B. S. (1973)
    The absolute energy distribution of two δ sct stars β cas (HR 21)and υ UMa (HR 3888) have been given.by matching these with model atmospheres there effective temperatures,gravities,radii and masses have been estimated.
  • Molecular abundances in sunspots 
    Gaur, V. P.; Pande, M. C.; Tripathi, B. M. (1973)
    The results of the dissociation equilibrium calculations for Zwaan’s sunspot model are given. It appears that many di-and tri-atomic molecules form in sufficient abundances in the spots. It is suggested that for assessing ...
  • C₂ in eta aquilae spectrum 
    Bondal, K. R.; Joshi, G. C.; Pande, M. C. (1973)
    The equivalent width of R₁ (16) line of the 0-0 band of the Swan system of C₂ calculated for the minimum phase of light variation in η Aql comes out to be 27 mÅ. Thus, if Dawe’s model atmosphere and the assumed abundance ...
  • Absence of the Phillips bands in the solar photospheric spectrum 
    Sinha, K. (1973)
    The absence of Phillips bands in the solar photospheric spectrum and the presence of Swan bands seems to point to a non-LTE path for the formation and disappearance of C₂ molecules in the solar photosphere.
  • Diffusion of CO and CH molecules in the solar atmosphere 
    Sinha, K.; Pande, M. C. (1973)
    The calculated rates of photodissoication, radiative association and the diffusion of CH and CO molecules show that the diffusion rates are many orders of magnitude smaller than the photodissociation and radiative association ...
  • On diatomic molecules in facula models 
    Tripathi, B. M.; Pande, M. C. (1973)
    Results of the dissociation equilibrium calculations in thre facula models indicate that more molecules form in the 7B2J Chapman model. Equivalent width calculations in 7B2J model show that the CO⁺ lines of (0-3) band of ...
  • 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 ...
  • Flares of YZ CMi 
    Kapoor, R. C. (1973-01-25)
  • Investigation of two delta scuti suspects 
    Bhatnagar, A. K.; Gupta, S. K. (1973-03-30)
  • Photoelectric monitor of the flare stars AD Leo and EV Lac 
    Kapoor, R. C.; Sanwal, B. B.; Sinvhal, S. D. (1973-07-14)
  • A flare on AD Leonis 
    Kapoor, R. C. (1973-11-26)
  • Intensity oscillations across the Ca II K line 
    Punetha, L. N (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 slowly ...
  • Equivalent widths of molecular lines in eta aquilae 
    Pande, M. C.; Joshi, G. C.; Bondal, K. R. (1974)
    Using dawe's model atmospheres the equivalent widths of R1 line belonging to the 0-0 band of the electronic transition B2∑+ →X2∑+ of the CN molecule were calculated for various phases of light variation in ŋAql. the ...
  • Energy distribution in early K-star 
    Chaturvedi, J. P.; Sinvhal, S. D. (1974)
    The spectral distribution of energy for 21 early K-star in the wavelength reason 450 nm to 750 nm at a definition of 5 nm have been obtained. A two dimensional photometric spectral classification index- system for these ...

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