609 citations · 1.3k across the 33 of their papers we have counts for
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Modelling the mid-infrared polarization in dust around young stars
Gautam Saikia, Rupjyoti Gogoi, Ranjan Gupta +1
The presence of crystalline silicates has been detected in the circumstellar environment of several young stars in the recent past and there is evidence of silicon carbide (SiC) de…
Composite Circumstellar Dust Grains
Ranjan Gupta, Dipak B. Vaidya, Rajeshwari Dutta
We calculate the absorption efficiencies of composite silicate grains with inclusions of graphite and silicon carbide in the spectral range 5--25. We study the variation in…
The Dust Content and Radiation Fields of Sample of Galaxies in the ELAIS-N1 Field
P. Shalima, Rupjyoti Gogoi, Amit Pathak +3
The Mid-IR colors () of galaxies together with their IR-UV luminosity correlations can be used to get some insight into the relative abundance of the different dust g…
Dust properties from GALEX observations of a UV halo around Spica
P. Shalima, Jayant Murthy, Ranjan Gupta
GALEX has detected ultraviolet halos extending as far as 5 around four bright stars (Murthy et al. (2011)). These halos are produced by scattering of starlight by dust gr…
Analytic formulas for frequency and size dependence of absorption and scattering efficiencies of astronomical polycyclic aromatic hydrocarbons
Ashim K. Roy, Subodh K. Sharma, Ranjan Gupta +1
In a series of two recent papers, the frequency and size distribution dependence of extinction spectra for astronomical silicate and graphite grains was analyzed by us in the conte…
Automated star-galaxy segregation using spectral and integrated band data for TAUVEX/ASTROSAT satellite data pipeline
Archana Bora, Ranjan Gupta, Harinder P. Singh +1
We employ an Artificial Neural Network (ANN) based technique to develop a pipeline for automated segregation of stars from the galaxies to be observed by Tel-Aviv University Ultra-…