The envelope of IRC+10216 seen at high angular resolution

Details The envelope of IRC+10216 seen at high angular resolution The envelope of IRC+10216 seen at high angular resolution

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..310m&link_type=abstract

Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at

Computer Science

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Scientific paper

The envelope of the nearby carbon star IRC+10216 has been imaged at optical wavelength in stellar and ambient Galactic light scattered by dust. In deep CFHT images, the envelope is seen up to a distance of 200 arcsec from the star, corresponding to 8000 years of expansion. Angular resolution down to 0.1 arcsec (corresponding to 4 years) is achieved by considering archive HST-WFPC2 data. This allows to study the detailed structure of the wind leaving the atmosphere. The envelope comprises multiple shells (or arcs) which are thin, nearly concentric but incomplete. In the center, a bipolar structure is seen, but it seems that on average the wind is isotropic. So, the data inform us about the mass loss history of the star and the mass loss mechanism, which is far from well understood. References: Mauron N. and Huggins P.J., 1999, AA 349, 203 Mauron N. and Huggins P.J., 2000, accepted by AA

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