Browsing by Subject "Grain size"

Now showing items 1-4 of 4

Anomalous dust in the environment of Herbig Ae/Be stars

Gorti, U; Bhatt, H. C (European Southern Observatory, 1993-04)

Photometric data in the UBVRI bands of Herbig Ae/Be stars have been analyzed to study the wavelength dependence of extinction to these objects. The color excess ratios E(U-B)/E(B-V), E(V-R)/E(B-V), E(V-I)/E(B-V) and ...
Large dust grains in the dark cloud B5

Bhatt, H. C (Royal Astronomical Society, 1986-09)

Polarization measurements of stars in the region of the dark cloud B5 indicate that the average dust grain size in the cloud is much larger than the mean interstellar grain size. Within the cloud, the average grain size ...
Polarimetric observations of the RV Tauri star AR Puppis

Raveendran, A. V; Kameswara Rao, N (European Southern Observatory, 1988-03)

UBVRI polarimetry of AR Pup is presented. Large variations are seen both in the amount and direction of polarization. On one occasion, the polarization in U was found to be as high as 14.6 percent. Polarization level ...
Polarimetry of Comet P/Halley - Properties of dust

Sen, A. K; Deshpande, M. R; Joshi, U. C; Kameswara Rao, N; Raveendran, A. V (European Southern Observatory, 1991-02)

Comet P/Halley was observed polarimetrically for seven nights in IHW and other continuum filters, during its pre- and postpreihelion passages. These polarimetric observations have been combined with the observations taken ...

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