On the infrared opacity of sunspots     

G. C. Joshi  L. M. Punetha  M. C. Pande 《Solar physics》1979,64(2):255-259

In the umbral atmosphere the depth dependence of the opacity due to the vibration rotation bands of various abundant molecules in the wavelength region 1 m to 10 m has been calculated. In the higher layers of the umbral atmosphere, the molecular opacity seems to dominate the opacity due to the negative hydrogen ion.  相似文献   

Doppler width of CH lines     

L. M. Punetha  G. C. Joshi 《Astrophysics and Space Science》1991,181(2):327-329

Twenty-one CH line profiles at the centre of the solar disk were Fourier-transformed to derive the Doppler widths. The Doppler width increases linearly with the equivalent width.  相似文献   

On the O2 Schumann-Runge band system in sunspots     

G. C. Joshi  L. M. Punetha  M. C. Pande 《Solar physics》1979,63(1):79-81

The visibility in the umbral ultraviolet spectrum of the O₂ Schumann-Runge absorption band system has been explored. It is found that the band system may be visible in high dispersion sunspot spectrum.  相似文献   

(A-X) system of SiO in sunspots     

G. C. Joshi  L. M. Punetha  M. C. Pande 《Solar physics》1979,62(1):77-82

The calculated equivalent widths of some lines of SiO in the umbral spectrum suggest that strong lines of Si²⁸O¹⁶, Si²⁹O¹⁶ and Si³⁰O¹⁶ may be present in the sunspot ultraviolet spectrum. We also find that between 37 000 and 47 000 cm^–1 the quasi-continuous absorption of SiO dominates all other absorptions.  相似文献   

Slope stability assessment and design of remedial measures for Tungnath Temple at Uttarakhand,India: a case study     

Samanta  M.  Punetha  P.  Sarkar  S.  Dwivedi  A.  Sharma  M. 《Natural Hazards》2019,96(1):225-246

Natural Hazards - The present paper assesses the slope stability of the Tungnath Temple at Rudraprayag District, in the Indian state of Uttarakhand, and suggests the remedial measures. The...  相似文献