Other
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..296c&link_type=abstract
Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at
Other
Scientific paper
Lunar occultation observations at 2.2 microns of the inner dust shell of the carbon rich long period variable IRC+10216 carried out in 1998 December (Variability phase 0.67)have yielded a one dimensional scan across the source at a position angle of 304 degrees with a high angular resolution of about 1 milli arcsec(mas).A uniform disk model fitted to the data yields a diameter of 294±0.5 mas.A model independent analysis shows significant departures from spherical symmetry indicating that the inner dust shell of IRC+10216 is extremely clumpy.Apart from the dominant component A atleast three other components B,C and D are seen within the clumpy structure.Comparison with concurrent and earlier speckle observations confirm the presence of these components and show that real spatial changes are taking place at the level of milli arcseconds on time scales of a few years in the inner dust shell of IRC+10216.
Chandrasekhar T.
Mondal Soumen
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