Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102..200d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, July 1991, p. 200-207.
Astronomy and Astrophysics
Astronomy
28
Carbon Stars, Infrared Photometry, Light Curve, Stellar Envelopes, Infrared Interferometers, Speckle Interferometry, Stellar Models
Scientific paper
This paper presents results of NIR photometric observations of IRC + 10216 star during the time interval 1965-1990, which were combined with measurements of the circumstellar shell surrounding IRC + 10216 by IR speckle interferometry. Using these data together with published observations, a very precise light curve was constructed, demonstrating the occurrence of long-term changes in the circumstellar shell surrounding IRC + 10216. The observations are discussed in the framework of two alternatives: (1) the occurrence of dynamical changes in the shell and (2) blocking of the direct light from the star to a portion of the shell by intervening material.
Benson Andrew J.
Dyck Mel H.
Howell Robert R.
Joyce Richard R.
Leinert Ch.
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